thodg/libgit2

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e140608..c0a819e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,21 @@
-v0.22 + 1
+v0.23 + 1
+-------
+
+### Changes or improvements
+
+* Custom filters can now be registered with wildcard attributes, for
+  example `filter=*`.  Consumers should examine the attributes parameter
+  of the `check` function for details.
+
+### API additions
+
+### API removals
+
+### Breaking API changes
+
+* `git_cert` descendent types now have a proper `parent` member
+
+v0.23
 ------
 
 ### Changes or improvements
@@ -177,6 +194,9 @@ v0.22 + 1
 * `git_submodule_save()` has been removed. The submodules are no
   longer configured via the objects.
 
+* `git_submodule_reload_all()` has been removed as we no longer cache
+  submodules.
+
 ### Breaking API changes
 
 * `git_smart_subtransport_cb` now has a `param` parameter.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5c55ddd..20e3272 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,7 +12,7 @@
 # > cmake --build . --target install
 
 PROJECT(libgit2 C)
-CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 CMAKE_POLICY(SET CMP0015 NEW)
 
 # Add find modules to the path
@@ -336,6 +336,7 @@ IF (MSVC)
 
 	IF (MSVC_CRTDBG)
 		SET(CRT_FLAG_DEBUG "${CRT_FLAG_DEBUG} /DGIT_MSVC_CRTDBG")
+		SET(CMAKE_C_STANDARD_LIBRARIES "${CMAKE_C_STANDARD_LIBRARIES}" "Dbghelp.lib")
 	ENDIF()
 
 	# /Zi - Create debugging information
diff --git a/README.md b/README.md
index 4ee1fdc..3191aee 100644
--- a/README.md
+++ b/README.md
@@ -88,7 +88,7 @@ Under Unix-like systems, like Linux, \*BSD and Mac OS X, libgit2 expects `pthrea
 they should be installed by default on all systems. Under Windows, libgit2 uses the native Windows API
 for threading.
 
-The `libgit2` library is built using [CMake](<http://www.cmake.org>) (version 2.6 or newer) on all platforms.
+The `libgit2` library is built using [CMake](<http://www.cmake.org>) (version 2.8 or newer) on all platforms.
 
 On most systems you can build the library using the following commands
 
diff --git a/examples/network/fetch.c b/examples/network/fetch.c
index 67444cb..bc7a5a0 100644
--- a/examples/network/fetch.c
+++ b/examples/network/fetch.c
@@ -23,32 +23,6 @@ static int progress_cb(const char *str, int len, void *data)
 	return 0;
 }
 
-static void *download(void *ptr)
-{
-	struct dl_data *data = (struct dl_data *)ptr;
-
-	// Connect to the remote end specifying that we want to fetch
-	// information from it.
-	if (git_remote_connect(data->remote, GIT_DIRECTION_FETCH, &data->fetch_opts->callbacks) < 0) {
-		data->ret = -1;
-		goto exit;
-	}
-
-	// Download the packfile and index it. This function updates the
-	// amount of received data and the indexer stats which lets you
-	// inform the user about progress.
-	if (git_remote_download(data->remote, NULL, data->fetch_opts) < 0) {
-		data->ret = -1;
-		goto exit;
-	}
-
-	data->ret = 0;
-
-exit:
-	data->finished = 1;
-	return &data->ret;
-}
-
 /**
  * This function gets called for each remote-tracking branch that gets
  * updated. The message we output depends on whether it's a new one or
@@ -73,6 +47,24 @@ static int update_cb(const char *refname, const git_oid *a, const git_oid *b, vo
 	return 0;
 }
 
+/**
+ * This gets called during the download and indexing. Here we show
+ * processed and total objects in the pack and the amount of received
+ * data. Most frontends will probably want to show a percentage and
+ * the download rate.
+ */
+static int transfer_progress_cb(const git_transfer_progress *stats, void *payload)
+{
+	if (stats->received_objects == stats->total_objects) {
+		printf("Resolving deltas %d/%d\r",
+		       stats->indexed_deltas, stats->total_deltas);
+	} else if (stats->total_objects > 0) {
+		printf("Received %d/%d objects (%d) in %" PRIuZ " bytes\r",
+		       stats->received_objects, stats->total_objects,
+		       stats->indexed_objects, stats->received_bytes);
+	}
+}
+
 /** Entry point for this command */
 int fetch(git_repository *repo, int argc, char **argv)
 {
@@ -80,9 +72,6 @@ int fetch(git_repository *repo, int argc, char **argv)
 	const git_transfer_progress *stats;
 	struct dl_data data;
 	git_fetch_options fetch_opts = GIT_FETCH_OPTIONS_INIT;
-#ifndef _WIN32
-	pthread_t worker;
-#endif
 
 	if (argc < 2) {
 		fprintf(stderr, "usage: %s fetch <repo>\n", argv[-1]);
@@ -99,67 +88,31 @@ int fetch(git_repository *repo, int argc, char **argv)
 	// Set up the callbacks (only update_tips for now)
 	fetch_opts.callbacks.update_tips = &update_cb;
 	fetch_opts.callbacks.sideband_progress = &progress_cb;
+	fetch_opts.callbacks.transfer_progress = transfer_progress_cb;
 	fetch_opts.callbacks.credentials = cred_acquire_cb;
 
-	// Set up the information for the background worker thread
-	data.remote = remote;
-	data.fetch_opts = &fetch_opts;
-	data.ret = 0;
-	data.finished = 0;
-
-	stats = git_remote_stats(remote);
-
-#ifdef _WIN32
-	download(&data);
-#else
-	pthread_create(&worker, NULL, download, &data);
-
-	// Loop while the worker thread is still running. Here we show processed
-	// and total objects in the pack and the amount of received
-	// data. Most frontends will probably want to show a percentage and
-	// the download rate.
-	do {
-		usleep(10000);
-
-		if (stats->received_objects == stats->total_objects) {
-			printf("Resolving deltas %d/%d\r",
-			       stats->indexed_deltas, stats->total_deltas);
-		} else if (stats->total_objects > 0) {
-			printf("Received %d/%d objects (%d) in %" PRIuZ " bytes\r",
-			       stats->received_objects, stats->total_objects,
-				   stats->indexed_objects, stats->received_bytes);
-		}
-	} while (!data.finished);
-
-	if (data.ret < 0)
-		goto on_error;
-
-	pthread_join(worker, NULL);
-#endif
+	/**
+	 * Perform the fetch with the configured refspecs from the
+	 * config. Update the reflog for the updated references with
+	 * "fetch".
+	 */
+	if (git_remote_fetch(remote, NULL, &fetch_opts, "fetch") < 0)
+		return -1;
 
 	/**
 	 * If there are local objects (we got a thin pack), then tell
 	 * the user how many objects we saved from having to cross the
 	 * network.
 	 */
+	stats = git_remote_stats(remote);
 	if (stats->local_objects > 0) {
-		printf("\rReceived %d/%d objects in %zu bytes (used %d local objects)\n",
+		printf("\rReceived %d/%d objects in %" PRIuZ " bytes (used %d local objects)\n",
 		       stats->indexed_objects, stats->total_objects, stats->received_bytes, stats->local_objects);
 	} else{
-		printf("\rReceived %d/%d objects in %zu bytes\n",
+		printf("\rReceived %d/%d objects in %" PRIuZ "bytes\n",
 			stats->indexed_objects, stats->total_objects, stats->received_bytes);
 	}
 
-	// Disconnect the underlying connection to prevent from idling.
-	git_remote_disconnect(remote);
-
-	// Update the references in the remote's namespace to point to the
-	// right commits. This may be needed even if there was no packfile
-	// to download, which can happen e.g. when the branches have been
-	// changed but all the needed objects are available locally.
-	if (git_remote_update_tips(remote, &fetch_opts.callbacks, 1, fetch_opts.download_tags, NULL) < 0)
-		return -1;
-
 	git_remote_free(remote);
 
 	return 0;
diff --git a/git.git-authors b/git.git-authors
index 9131a1f..6a85224 100644
--- a/git.git-authors
+++ b/git.git-authors
@@ -39,6 +39,7 @@ ok	Adam Simpkins <adam@adamsimpkins.net> (http transport)
 ok	Adrian Johnson <ajohnson@redneon.com>
 ok	Alexey Shumkin <alex.crezoff@gmail.com>
 ok	Andreas Ericsson <ae@op5.se>
+ok	Antoine Pelisse <apelisse@gmail.com>
 ok	Boyd Lynn Gerber <gerberb@zenez.com>
 ok	Brandon Casey <drafnel@gmail.com>
 ok	Brian Downing <bdowning@lavos.net>
diff --git a/include/git2/diff.h b/include/git2/diff.h
index b3ab539..0abbc7f 100644
--- a/include/git2/diff.h
+++ b/include/git2/diff.h
@@ -836,6 +836,25 @@ GIT_EXTERN(int) git_diff_tree_to_workdir_with_index(
 	const git_diff_options *opts); /**< can be NULL for defaults */
 
 /**
+ * Create a diff with the difference between two index objects.
+ *
+ * The first index will be used for the "old_file" side of the delta and the
+ * second index will be used for the "new_file" side of the delta.
+ *
+ * @param diff Output pointer to a git_diff pointer to be allocated.
+ * @param repo The repository containing the indexes.
+ * @param old_index A git_index object to diff from.
+ * @param new_index A git_index object to diff to.
+ * @param opts Structure with options to influence diff or NULL for defaults.
+ */
+GIT_EXTERN(int) git_diff_index_to_index(
+	git_diff **diff,
+	git_repository *repo,
+	git_index *old_index,
+	git_index *new_index,
+	const git_diff_options *opts); /**< can be NULL for defaults */
+
+/**
  * Merge one diff into another.
  *
  * This merges items from the "from" list into the "onto" list.  The
diff --git a/include/git2/filter.h b/include/git2/filter.h
index 1828903..436a0f3 100644
--- a/include/git2/filter.h
+++ b/include/git2/filter.h
@@ -137,7 +137,13 @@ GIT_EXTERN(int) git_filter_list_apply_to_data(
 	git_buf *in);
 
 /**
- * Apply filter list to the contents of a file on disk
+ * Apply a filter list to the contents of a file on disk
+ *
+ * @param out buffer into which to store the filtered file
+ * @param filters the list of filters to apply
+ * @param repo the repository in which to perform the filtering
+ * @param path the path of the file to filter, a relative path will be
+ * taken as relative to the workdir
  */
 GIT_EXTERN(int) git_filter_list_apply_to_file(
 	git_buf *out,
@@ -146,24 +152,51 @@ GIT_EXTERN(int) git_filter_list_apply_to_file(
 	const char *path);
 
 /**
- * Apply filter list to the contents of a blob
+ * Apply a filter list to the contents of a blob
+ *
+ * @param out buffer into which to store the filtered file
+ * @param filters the list of filters to apply
+ * @param blob the blob to filter
  */
 GIT_EXTERN(int) git_filter_list_apply_to_blob(
 	git_buf *out,
 	git_filter_list *filters,
 	git_blob *blob);
 
+/**
+ * Apply a filter list to an arbitrary buffer as a stream
+ *
+ * @param filters the list of filters to apply
+ * @param data the buffer to filter
+ * @param target the stream into which the data will be written
+ */
 GIT_EXTERN(int) git_filter_list_stream_data(
 	git_filter_list *filters,
 	git_buf *data,
 	git_writestream *target);
 
+/**
+ * Apply a filter list to a file as a stream
+ *
+ * @param filters the list of filters to apply
+ * @param repo the repository in which to perform the filtering
+ * @param path the path of the file to filter, a relative path will be
+ * taken as relative to the workdir
+ * @param target the stream into which the data will be written
+ */
 GIT_EXTERN(int) git_filter_list_stream_file(
 	git_filter_list *filters,
 	git_repository *repo,
 	const char *path,
 	git_writestream *target);
 
+/**
+ * Apply a filter list to a blob as a stream
+ *
+ * @param filters the list of filters to apply
+ * @param blob the blob to filter
+ * @param target the stream into which the data will be written
+ */
 GIT_EXTERN(int) git_filter_list_stream_blob(
 	git_filter_list *filters,
 	git_blob *blob,
diff --git a/include/git2/remote.h b/include/git2/remote.h
index e47f008..444fe52 100644
--- a/include/git2/remote.h
+++ b/include/git2/remote.h
@@ -511,6 +511,14 @@ typedef enum {
 	GIT_REMOTE_DOWNLOAD_TAGS_ALL,
 } git_remote_autotag_option_t;
 
+/**
+ * Fetch options structure.
+ *
+ * Zero out for defaults.  Initialize with `GIT_FETCH_OPTIONS_INIT` macro to
+ * correctly set the `version` field.  E.g.
+ *
+ *		git_fetch_options opts = GIT_FETCH_OPTIONS_INIT;
+ */
 typedef struct {
 	int version;
 
@@ -739,7 +747,7 @@ GIT_EXTERN(int) git_remote_prune_refs(const git_remote *remote);
  * stored here for further processing by the caller. Always free this
  * strarray on successful return.
  * @param repo the repository in which to rename
- * @param name the current name of the reamote
+ * @param name the current name of the remote
  * @param new_name the new name the remote should bear
  * @return 0, GIT_EINVALIDSPEC, GIT_EEXISTS or an error code
  */
diff --git a/include/git2/submodule.h b/include/git2/submodule.h
index cbafccd..689fe4b 100644
--- a/include/git2/submodule.h
+++ b/include/git2/submodule.h
@@ -584,17 +584,6 @@ GIT_EXTERN(int) git_submodule_open(
 GIT_EXTERN(int) git_submodule_reload(git_submodule *submodule, int force);
 
 /**
- * Reread all submodule info.
- *
- * Call this to reload all cached submodule information for the repo.
- *
- * @param repo The repository to reload submodule data for
- * @param force Force full reload even if the data doesn't seem out of date
- * @return 0 on success, <0 on error
- */
-GIT_EXTERN(int) git_submodule_reload_all(git_repository *repo, int force);
-
-/**
  * Get the status for a submodule.
  *
  * This looks at a submodule and tries to determine the status.  It
diff --git a/include/git2/sys/filter.h b/include/git2/sys/filter.h
index 5fd8d55..baf1515 100644
--- a/include/git2/sys/filter.h
+++ b/include/git2/sys/filter.h
@@ -240,7 +240,10 @@ typedef void (*git_filter_cleanup_fn)(
  * for this filter (e.g. "eol crlf text").  If the attribute name is bare,
  * it will be simply loaded and passed to the `check` callback.  If it has
  * a value (i.e. "name=value"), the attribute must match that value for
- * the filter to be applied.
+ * the filter to be applied.  The value may be a wildcard (eg, "name=*"),
+ * in which case the filter will be invoked for any value for the given
+ * attribute name.  See the attribute parameter of the `check` callback
+ * for the attribute value that was specified.
  *
  * The `initialize`, `shutdown`, `check`, `apply`, and `cleanup` callbacks
  * are all documented above with the respective function pointer typedefs.
diff --git a/include/git2/transport.h b/include/git2/transport.h
index 2eeebd5..fd55eac 100644
--- a/include/git2/transport.h
+++ b/include/git2/transport.h
@@ -37,39 +37,32 @@ typedef enum {
  * Hostkey information taken from libssh2
  */
 typedef struct {
+	git_cert parent;
+
 	/**
-	 * Type of certificate. Here to share the header with
-	 * `git_cert`.
+	 * A hostkey type from libssh2, either
+	 * `GIT_CERT_SSH_MD5` or `GIT_CERT_SSH_SHA1`
 	 */
-	git_cert_t cert_type;
-        /**
-         * A hostkey type from libssh2, either
-         * `GIT_CERT_SSH_MD5` or `GIT_CERT_SSH_SHA1`
-         */
 	git_cert_ssh_t type;
 
-        /**
-         * Hostkey hash. If type has `GIT_CERT_SSH_MD5` set, this will
-         * have the MD5 hash of the hostkey.
-         */
+	/**
+	 * Hostkey hash. If type has `GIT_CERT_SSH_MD5` set, this will
+	 * have the MD5 hash of the hostkey.
+	 */
 	unsigned char hash_md5[16];
 
-        /**
-         * Hostkey hash. If type has `GIT_CERT_SSH_SHA1` set, this will
-         * have the SHA-1 hash of the hostkey.
-         */
-        unsigned char hash_sha1[20];
+	/**
+	 * Hostkey hash. If type has `GIT_CERT_SSH_SHA1` set, this will
+	 * have the SHA-1 hash of the hostkey.
+	 */
+	unsigned char hash_sha1[20];
 } git_cert_hostkey;
 
 /**
  * X.509 certificate information
  */
 typedef struct {
-	/**
-	 * Type of certificate. Here to share the header with
-	 * `git_cert`.
-	 */
-	git_cert_t cert_type;
+	git_cert parent;
 	/**
 	 * Pointer to the X.509 certificate data
 	 */
diff --git a/script/install-deps-osx.sh b/script/install-deps-osx.sh
index c2e0162..5510379 100755
--- a/script/install-deps-osx.sh
+++ b/script/install-deps-osx.sh
@@ -2,4 +2,5 @@
 
 set -x
 
-brew install libssh2 cmake
+brew update
+brew install libssh2
diff --git a/src/blame_git.c b/src/blame_git.c
index e863efe..f481426 100644
--- a/src/blame_git.c
+++ b/src/blame_git.c
@@ -304,21 +304,16 @@ static void blame_chunk(
 }
 
 static int my_emit(
-		xdfenv_t *xe,
-		xdchange_t *xscr,
-		xdemitcb_t *ecb,
-		xdemitconf_t const *xecfg)
+	long start_a, long count_a,
+	long start_b, long count_b,
+	void *cb_data)
 {
-	xdchange_t *xch = xscr;
-	GIT_UNUSED(xe);
-	GIT_UNUSED(xecfg);
-	while (xch) {
-		blame_chunk_cb_data *d = ecb->priv;
-		blame_chunk(d->blame, d->tlno, d->plno, xch->i2, d->target, d->parent);
-		d->plno = xch->i1 + xch->chg1;
-		d->tlno = xch->i2 + xch->chg2;
-		xch = xch->next;
-	}
+	blame_chunk_cb_data *d = (blame_chunk_cb_data *)cb_data;
+
+	blame_chunk(d->blame, d->tlno, d->plno, start_b, d->target, d->parent);
+	d->plno = start_a + count_a;
+	d->tlno = start_b + count_b;
+	
 	return 0;
 }
 
@@ -352,7 +347,7 @@ static int diff_hunks(mmfile_t file_a, mmfile_t file_b, void *cb_data)
 	xdemitconf_t xecfg = {0};
 	xdemitcb_t ecb = {0};
 
-	xecfg.emit_func = (void(*)(void))my_emit;
+	xecfg.hunk_func = my_emit;
 	ecb.priv = cb_data;
 
 	trim_common_tail(&file_a, &file_b, 0);
diff --git a/src/cache.c b/src/cache.c
index 2f3ad15..ca5173c 100644
--- a/src/cache.c
+++ b/src/cache.c
@@ -50,16 +50,16 @@ void git_cache_dump_stats(git_cache *cache)
 	if (kh_size(cache->map) == 0)
 		return;
 
-	printf("Cache %p: %d items cached, %d bytes\n",
-		cache, kh_size(cache->map), (int)cache->used_memory);
+	printf("Cache %p: %d items cached, %"PRIdZ" bytes\n",
+		cache, kh_size(cache->map), cache->used_memory);
 
 	kh_foreach_value(cache->map, object, {
 		char oid_str[9];
-		printf(" %s%c %s (%d)\n",
+		printf(" %s%c %s (%"PRIuZ")\n",
 			git_object_type2string(object->type),
 			object->flags == GIT_CACHE_STORE_PARSED ? '*' : ' ',
 			git_oid_tostr(oid_str, sizeof(oid_str), &object->oid),
-			(int)object->size
+			object->size
 		);
 	});
 }
diff --git a/src/checkout.c b/src/checkout.c
index a94d509..4b3acbc 100644
--- a/src/checkout.c
+++ b/src/checkout.c
@@ -1299,8 +1299,8 @@ static int checkout_get_actions(
 	if (counts[CHECKOUT_ACTION__CONFLICT] > 0 &&
 		(data->strategy & GIT_CHECKOUT_ALLOW_CONFLICTS) == 0)
 	{
-		giterr_set(GITERR_CHECKOUT, "%d %s checkout",
-			(int)counts[CHECKOUT_ACTION__CONFLICT],
+		giterr_set(GITERR_CHECKOUT, "%"PRIuZ" %s checkout",
+			counts[CHECKOUT_ACTION__CONFLICT],
 			counts[CHECKOUT_ACTION__CONFLICT] == 1 ?
 			"conflict prevents" : "conflicts prevent");
 		error = GIT_ECONFLICT;
diff --git a/src/common.h b/src/common.h
index cdb0b51..2b1dedc 100644
--- a/src/common.h
+++ b/src/common.h
@@ -46,6 +46,10 @@
 # ifdef GIT_THREADS
 #	include "win32/pthread.h"
 # endif
+# if defined(GIT_MSVC_CRTDBG)
+#   include "win32/w32_stack.h"
+#   include "win32/w32_crtdbg_stacktrace.h"
+# endif
 
 #else
 
diff --git a/src/curl_stream.c b/src/curl_stream.c
index 6534bdb..63421fc 100644
--- a/src/curl_stream.c
+++ b/src/curl_stream.c
@@ -67,9 +67,9 @@ static int curls_certificate(git_cert **out, git_stream *stream)
 
 	/* No information is available, can happen with SecureTransport */
 	if (certinfo->num_of_certs == 0) {
-		s->cert_info.cert_type = GIT_CERT_NONE;
-		s->cert_info.data      = NULL;
-		s->cert_info.len       = 0;
+		s->cert_info.parent.cert_type = GIT_CERT_NONE;
+		s->cert_info.data             = NULL;
+		s->cert_info.len              = 0;
 		return 0;
 	}
 
@@ -85,11 +85,11 @@ static int curls_certificate(git_cert **out, git_stream *stream)
 	s->cert_info_strings.strings = (char **) strings.contents;
 	s->cert_info_strings.count   = strings.length;
 
-	s->cert_info.cert_type = GIT_CERT_STRARRAY;
-	s->cert_info.data      = &s->cert_info_strings;
-	s->cert_info.len       = strings.length;
+	s->cert_info.parent.cert_type = GIT_CERT_STRARRAY;
+	s->cert_info.data             = &s->cert_info_strings;
+	s->cert_info.len              = strings.length;
 
-	*out = (git_cert *) &s->cert_info;
+	*out = &s->cert_info.parent;
 
 	return 0;
 }
diff --git a/src/diff.c b/src/diff.c
index c1adcc6..44f6278 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -1421,6 +1421,31 @@ int git_diff_tree_to_workdir_with_index(
 	return error;
 }
 
+int git_diff_index_to_index(
+	git_diff **diff,
+	git_repository *repo,
+	git_index *old_index,
+	git_index *new_index,
+	const git_diff_options *opts)
+{
+	int error = 0;
+
+	assert(diff && old_index && new_index);
+
+	DIFF_FROM_ITERATORS(
+		git_iterator_for_index(
+			&a, old_index, GIT_ITERATOR_DONT_IGNORE_CASE, pfx, pfx),
+		git_iterator_for_index(
+			&b, new_index, GIT_ITERATOR_DONT_IGNORE_CASE, pfx, pfx)
+	);
+
+	/* if index is in case-insensitive order, re-sort deltas to match */
+	if (!error && (old_index->ignore_case || new_index->ignore_case))
+		diff_set_ignore_case(*diff, true);
+
+	return error;
+}
+
 size_t git_diff_num_deltas(const git_diff *diff)
 {
 	assert(diff);
diff --git a/src/filter.c b/src/filter.c
index e25d37c..70c4fa3 100644
--- a/src/filter.c
+++ b/src/filter.c
@@ -433,8 +433,11 @@ static int filter_list_check_attributes(
 		want_type  = git_attr_value(want);
 		found_type = git_attr_value(strs[i]);
 
-		if (want_type != found_type ||
-			(want_type == GIT_ATTR_VALUE_T && strcmp(want, strs[i])))
+		if (want_type != found_type)
+			error = GIT_ENOTFOUND;
+		else if (want_type == GIT_ATTR_VALUE_T &&
+				strcmp(want, strs[i]) &&
+				strcmp(want, "*"))
 			error = GIT_ENOTFOUND;
 	}
 
diff --git a/src/global.c b/src/global.c
index cb22424..37a47bd 100644
--- a/src/global.c
+++ b/src/global.c
@@ -11,7 +11,10 @@
 #include "git2/global.h"
 #include "git2/sys/openssl.h"
 #include "thread-utils.h"
-
+#if defined(GIT_MSVC_CRTDBG)
+#include "win32/w32_stack.h"
+#include "win32/w32_crtdbg_stacktrace.h"
+#endif
 
 git_mutex git__mwindow_mutex;
 
@@ -225,6 +228,11 @@ int git_libgit2_init(void)
 
 	/* Only do work on a 0 -> 1 transition of the refcount */
 	if ((ret = git_atomic_inc(&git__n_inits)) == 1) {
+#if defined(GIT_MSVC_CRTDBG)
+		git_win32__crtdbg_stacktrace_init();
+		git_win32__stack_init();
+#endif
+
 		if (synchronized_threads_init() < 0)
 			ret = -1;
 	}
@@ -254,9 +262,15 @@ int git_libgit2_shutdown(void)
 	while (InterlockedCompareExchange(&_mutex, 1, 0)) { Sleep(0); }
 
 	/* Only do work on a 1 -> 0 transition of the refcount */
-	if ((ret = git_atomic_dec(&git__n_inits)) == 0)
+	if ((ret = git_atomic_dec(&git__n_inits)) == 0) {
 		synchronized_threads_shutdown();
 
+#if defined(GIT_MSVC_CRTDBG)
+		git_win32__crtdbg_stacktrace_cleanup();
+		git_win32__stack_cleanup();
+#endif
+	}
+
 	/* Exit the lock */
 	InterlockedExchange(&_mutex, 0);
 
diff --git a/src/iterator.c b/src/iterator.c
index 2c3a87a..a312afb 100644
--- a/src/iterator.c
+++ b/src/iterator.c
@@ -1921,8 +1921,8 @@ int git_iterator_walk(
 	}
 
 done:
-	git__free(iterator_item);
-	git__free(cur_items);
+	git__free((git_index_entry **)iterator_item);
+	git__free((git_index_entry **)cur_items);
 
 	if (error == GIT_ITEROVER)
 		error = 0;
diff --git a/src/khash.h b/src/khash.h
index 818ac83..71eb583 100644
--- a/src/khash.h
+++ b/src/khash.h
@@ -619,4 +619,4 @@ typedef const char *kh_cstr_t;
 #define KHASH_MAP_INIT_STR(name, khval_t)								\
 	KHASH_INIT(name, kh_cstr_t, khval_t, 1, kh_str_hash_func, kh_str_hash_equal)
 
-#endif /* __AC_KHASH_H */
\ No newline at end of file
+#endif /* __AC_KHASH_H */
diff --git a/src/merge.c b/src/merge.c
index 9d6252e..863ac8f 100644
--- a/src/merge.c
+++ b/src/merge.c
@@ -79,7 +79,7 @@ int merge_bases_many(git_commit_list **out, git_revwalk **walk_out, git_reposito
 	unsigned int i;
 
 	if (length < 2) {
-		giterr_set(GITERR_INVALID, "At least two commits are required to find an ancestor. Provided 'length' was %u.", length);
+		giterr_set(GITERR_INVALID, "At least two commits are required to find an ancestor. Provided 'length' was %" PRIuZ ".", length);
 		return -1;
 	}
 
@@ -185,7 +185,7 @@ int git_merge_base_octopus(git_oid *out, git_repository *repo, size_t length, co
 	assert(out && repo && input_array);
 
 	if (length < 2) {
-		giterr_set(GITERR_INVALID, "At least two commits are required to find an ancestor. Provided 'length' was %u.", length);
+		giterr_set(GITERR_INVALID, "At least two commits are required to find an ancestor. Provided 'length' was %" PRIuZ ".", length);
 		return -1;
 	}
 
@@ -2451,7 +2451,7 @@ int git_merge__check_result(git_repository *repo, git_index *index_new)
 		goto done;
 
 	if ((conflicts = index_conflicts + wd_conflicts) > 0) {
-		giterr_set(GITERR_MERGE, "%d uncommitted change%s would be overwritten by merge",
+		giterr_set(GITERR_MERGE, "%" PRIuZ " uncommitted change%s would be overwritten by merge",
 			conflicts, (conflicts != 1) ? "s" : "");
 		error = GIT_ECONFLICT;
 	}
diff --git a/src/openssl_stream.c b/src/openssl_stream.c
index 958252e..8ff53d4 100644
--- a/src/openssl_stream.c
+++ b/src/openssl_stream.c
@@ -324,7 +324,9 @@ int openssl_connect(git_stream *stream)
 
 	SSL_set_bio(st->ssl, bio, bio);
 	/* specify the host in case SNI is needed */
+#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
 	SSL_set_tlsext_host_name(st->ssl, st->host);
+#endif
 
 	if ((ret = SSL_connect(st->ssl)) <= 0)
 		return ssl_set_error(st->ssl, ret);
@@ -358,11 +360,12 @@ int openssl_certificate(git_cert **out, git_stream *stream)
 		return -1;
 	}
 
-	st->cert_info.cert_type = GIT_CERT_X509;
+	st->cert_info.parent.cert_type = GIT_CERT_X509;
 	st->cert_info.data = encoded_cert;
 	st->cert_info.len = len;
 
-	*out = (git_cert *)&st->cert_info;
+	*out = &st->cert_info.parent;
+
 	return 0;
 }
 
diff --git a/src/rebase.c b/src/rebase.c
index 8da7b4f..17536c0 100644
--- a/src/rebase.c
+++ b/src/rebase.c
@@ -436,7 +436,7 @@ static int rebase_setupfiles_merge(git_rebase *rebase)
 	size_t i;
 	int error = 0;
 
-	if ((error = rebase_setupfile(rebase, END_FILE, -1, "%d\n", git_array_size(rebase->operations))) < 0 ||
+	if ((error = rebase_setupfile(rebase, END_FILE, -1, "%" PRIuZ "\n", git_array_size(rebase->operations))) < 0 ||
 		(error = rebase_setupfile(rebase, ONTO_NAME_FILE, -1, "%s\n", rebase->onto_name)) < 0)
 		goto done;
 
@@ -789,7 +789,7 @@ static int rebase_next_merge(
 	normalize_checkout_options_for_apply(&checkout_opts, rebase, current_commit);
 
 	if ((error = git_indexwriter_init_for_operation(&indexwriter, rebase->repo, &checkout_opts.checkout_strategy)) < 0 ||
-		(error = rebase_setupfile(rebase, MSGNUM_FILE, -1, "%d\n", rebase->current+1)) < 0 ||
+		(error = rebase_setupfile(rebase, MSGNUM_FILE, -1, "%" PRIuZ "\n", rebase->current+1)) < 0 ||
 		(error = rebase_setupfile(rebase, CURRENT_FILE, -1, "%.*s\n", GIT_OID_HEXSZ, current_idstr)) < 0 ||
 		(error = git_merge_trees(&index, rebase->repo, parent_tree, head_tree, current_tree, NULL)) < 0 ||
 		(error = git_merge__check_result(rebase->repo, index)) < 0 ||
diff --git a/src/repository.c b/src/repository.c
index 82d9981..08f4baa 100644
--- a/src/repository.c
+++ b/src/repository.c
@@ -867,7 +867,9 @@ static int reserved_names_add8dot3(git_repository *repo, const char *path)
 {
 	char *name = git_win32_path_8dot3_name(path);
 	const char *def = GIT_DIR_SHORTNAME;
+	const char *def_dot_git = DOT_GIT;
 	size_t name_len, def_len = CONST_STRLEN(GIT_DIR_SHORTNAME);
+	size_t def_dot_git_len = CONST_STRLEN(DOT_GIT);
 	git_buf *buf;
 
 	if (!name)
@@ -875,7 +877,8 @@ static int reserved_names_add8dot3(git_repository *repo, const char *path)
 
 	name_len = strlen(name);
 
-	if (name_len == def_len && memcmp(name, def, def_len) == 0) {
+	if ((name_len == def_len && memcmp(name, def, def_len) == 0) || 
+		(name_len == def_dot_git_len && memcmp(name, def_dot_git, def_dot_git_len) == 0)) {
 		git__free(name);
 		return 0;
 	}
diff --git a/src/stash.c b/src/stash.c
index acf8944..fcb1112 100644
--- a/src/stash.c
+++ b/src/stash.c
@@ -770,7 +770,7 @@ static int ensure_clean_index(git_repository *repo, git_index *index)
 		goto done;
 
 	if (git_diff_num_deltas(index_diff) > 0) {
-		giterr_set(GITERR_STASH, "%d uncommitted changes exist in the index",
+		giterr_set(GITERR_STASH, "%" PRIuZ " uncommitted changes exist in the index",
 			git_diff_num_deltas(index_diff));
 		error = GIT_EUNCOMMITTED;
 	}
diff --git a/src/stransport_stream.c b/src/stransport_stream.c
index 10e1916..33b6c5c 100644
--- a/src/stransport_stream.c
+++ b/src/stransport_stream.c
@@ -108,7 +108,7 @@ int stransport_certificate(git_cert **out, git_stream *stream)
 		return -1;
 	}
 
-	st->cert_info.cert_type = GIT_CERT_X509;
+	st->cert_info.parent.cert_type = GIT_CERT_X509;
 	st->cert_info.data = (void *) CFDataGetBytePtr(st->der_data);
 	st->cert_info.len = CFDataGetLength(st->der_data);
 
diff --git a/src/submodule.c b/src/submodule.c
index 17e1a35..892c983 100644
--- a/src/submodule.c
+++ b/src/submodule.c
@@ -1385,7 +1385,7 @@ int git_submodule_reload(git_submodule *sm, int force)
 
 		git_buf_sets(&path, "submodule\\.");
 		git_buf_text_puts_escape_regex(&path, sm->name);
-		git_buf_puts(&path, ".*");
+		git_buf_puts(&path, "\\..*");
 
 		if (git_buf_oom(&path)) {
 			error = -1;
@@ -1647,7 +1647,7 @@ static int submodule_load_from_config(
 	} else {
 		khiter_t pos;
 		git_strmap *map = data->map;
-		pos = git_strmap_lookup_index(map, name.ptr);
+		pos = git_strmap_lookup_index(map, path ? path : name.ptr);
 		if (git_strmap_valid_index(map, pos)) {
 			sm = git_strmap_value_at(map, pos);
 		} else {
diff --git a/src/thread-utils.c b/src/thread-utils.c
index c3baf41..dc9b2f0 100644
--- a/src/thread-utils.c
+++ b/src/thread-utils.c
@@ -8,7 +8,9 @@
 #include "thread-utils.h"
 
 #ifdef _WIN32
+#ifndef WIN32_LEAN_AND_MEAN
 #	define WIN32_LEAN_AND_MEAN
+#endif
 #	include <windows.h>
 #elif defined(hpux) || defined(__hpux) || defined(_hpux)
 #	include <sys/pstat.h>
diff --git a/src/transports/http.c b/src/transports/http.c
index dd44264..1ed292b 100644
--- a/src/transports/http.c
+++ b/src/transports/http.c
@@ -511,7 +511,7 @@ static int write_chunk(git_stream *io, const char *buffer, size_t len)
 	git_buf buf = GIT_BUF_INIT;
 
 	/* Chunk header */
-	git_buf_printf(&buf, "%X\r\n", (unsigned)len);
+	git_buf_printf(&buf, "%" PRIxZ "\r\n", len);
 
 	if (git_buf_oom(&buf))
 		return -1;
diff --git a/src/transports/smart_pkt.c b/src/transports/smart_pkt.c
index d214c9f..9ccbd80 100644
--- a/src/transports/smart_pkt.c
+++ b/src/transports/smart_pkt.c
@@ -523,7 +523,7 @@ static int buffer_want_with_caps(const git_remote_head *head, transport_smart_ca
 
 	if (len > 0xffff) {
 		giterr_set(GITERR_NET,
-			"Tried to produce packet with invalid length %d", len);
+			"Tried to produce packet with invalid length %" PRIuZ, len);
 		return -1;
 	}
 
diff --git a/src/transports/ssh.c b/src/transports/ssh.c
index 83af137..0b0d4ba 100644
--- a/src/transports/ssh.c
+++ b/src/transports/ssh.c
@@ -525,10 +525,10 @@ static int _git_ssh_setup_conn(
 		goto done;
 
 	if (t->owner->certificate_check_cb != NULL) {
-		git_cert_hostkey cert = { 0 }, *cert_ptr;
+		git_cert_hostkey cert = {{ 0 }}, *cert_ptr;
 		const char *key;
 
-		cert.cert_type = GIT_CERT_HOSTKEY_LIBSSH2;
+		cert.parent.cert_type = GIT_CERT_HOSTKEY_LIBSSH2;
 
 		key = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);
 		if (key != NULL) {
diff --git a/src/transports/winhttp.c b/src/transports/winhttp.c
index da047d6..0c43c4b 100644
--- a/src/transports/winhttp.c
+++ b/src/transports/winhttp.c
@@ -228,7 +228,7 @@ static int certificate_check(winhttp_stream *s, int valid)
 	}
 
 	giterr_clear();
-	cert.cert_type = GIT_CERT_X509;
+	cert.parent.cert_type = GIT_CERT_X509;
 	cert.data = cert_ctx->pbCertEncoded;
 	cert.len = cert_ctx->cbCertEncoded;
 	error = t->owner->certificate_check_cb((git_cert *) &cert, valid, t->connection_data.host, t->owner->cred_acquire_payload);
diff --git a/src/util.h b/src/util.h
index 458b0db..d0c3cd0 100644
--- a/src/util.h
+++ b/src/util.h
@@ -38,6 +38,7 @@
  */
 #include <stdlib.h>
 #include <crtdbg.h>
+#include "win32/w32_crtdbg_stacktrace.h"
 #endif
 
 #include "common.h"
@@ -65,23 +66,24 @@
 #define CONST_STRLEN(x) ((sizeof(x)/sizeof(x[0])) - 1)
 
 #if defined(GIT_MSVC_CRTDBG)
+
 GIT_INLINE(void *) git__crtdbg__malloc(size_t len, const char *file, int line)
 {
-	void *ptr = _malloc_dbg(len, _NORMAL_BLOCK, file, line);
+	void *ptr = _malloc_dbg(len, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
 	if (!ptr) giterr_set_oom();
 	return ptr;
 }
 
 GIT_INLINE(void *) git__crtdbg__calloc(size_t nelem, size_t elsize, const char *file, int line)
 {
-	void *ptr = _calloc_dbg(nelem, elsize, _NORMAL_BLOCK, file, line);
+	void *ptr = _calloc_dbg(nelem, elsize, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
 	if (!ptr) giterr_set_oom();
 	return ptr;
 }
 
 GIT_INLINE(char *) git__crtdbg__strdup(const char *str, const char *file, int line)
 {
-	char *ptr = _strdup_dbg(str, _NORMAL_BLOCK, file, line);
+	char *ptr = _strdup_dbg(str, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
 	if (!ptr) giterr_set_oom();
 	return ptr;
 }
@@ -121,7 +123,7 @@ GIT_INLINE(char *) git__crtdbg__substrdup(const char *start, size_t n, const cha
 
 GIT_INLINE(void *) git__crtdbg__realloc(void *ptr, size_t size, const char *file, int line)
 {
-	void *new_ptr = _realloc_dbg(ptr, size, _NORMAL_BLOCK, file, line);
+	void *new_ptr = _realloc_dbg(ptr, size, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
 	if (!new_ptr) giterr_set_oom();
 	return new_ptr;
 }
@@ -129,8 +131,9 @@ GIT_INLINE(void *) git__crtdbg__realloc(void *ptr, size_t size, const char *file
 GIT_INLINE(void *) git__crtdbg__reallocarray(void *ptr, size_t nelem, size_t elsize, const char *file, int line)
 {
 	size_t newsize;
+
 	return GIT_MULTIPLY_SIZET_OVERFLOW(&newsize, nelem, elsize) ?
-		NULL : _realloc_dbg(ptr, newsize, _NORMAL_BLOCK, file, line);
+		NULL : _realloc_dbg(ptr, newsize, _NORMAL_BLOCK, git_win32__crtdbg_stacktrace(1,file), line);
 }
 
 GIT_INLINE(void *) git__crtdbg__mallocarray(size_t nelem, size_t elsize, const char *file, int line)
diff --git a/src/win32/w32_crtdbg_stacktrace.c b/src/win32/w32_crtdbg_stacktrace.c
new file mode 100644
index 0000000..a778f41
--- /dev/null
+++ b/src/win32/w32_crtdbg_stacktrace.c
@@ -0,0 +1,343 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#if defined(GIT_MSVC_CRTDBG)
+#include "w32_stack.h"
+#include "w32_crtdbg_stacktrace.h"
+
+#define CRTDBG_STACKTRACE__UID_LEN (15)
+
+/**
+ * The stacktrace of an allocation can be distilled
+ * to a unique id based upon the stackframe pointers
+ * and ignoring any size arguments. We will use these
+ * UIDs as the (char const*) __FILE__ argument we
+ * give to the CRT malloc routines.
+ */
+typedef struct {
+	char uid[CRTDBG_STACKTRACE__UID_LEN + 1];
+} git_win32__crtdbg_stacktrace__uid;
+
+/**
+ * All mallocs with the same stacktrace will be de-duped
+ * and aggregated into this row.
+ */
+typedef struct {
+	git_win32__crtdbg_stacktrace__uid uid; /* must be first */
+	git_win32__stack__raw_data raw_data;
+	unsigned int count_allocs; /* times this alloc signature seen since init */
+	unsigned int count_allocs_at_last_checkpoint; /* times since last mark */
+	unsigned int transient_count_leaks; /* sum of leaks */
+} git_win32__crtdbg_stacktrace__row;
+
+static CRITICAL_SECTION g_crtdbg_stacktrace_cs;
+
+/**
+ * CRTDBG memory leak tracking takes a "char const * const file_name"
+ * and stores the pointer in the heap data (instead of allocing a copy
+ * for itself).  Normally, this is not a problem, since we usually pass
+ * in __FILE__.  But I'm going to lie to it and pass in the address of
+ * the UID in place of the file_name.  Also, I do not want to alloc the
+ * stacktrace data (because we are called from inside our alloc routines).
+ * Therefore, I'm creating a very large static pool array to store row
+ * data. This also eliminates the temptation to realloc it (and move the
+ * UID pointers).
+ *
+ * And to efficiently look for duplicates we need an index on the rows
+ * so we can bsearch it.  Again, without mallocing.
+ *
+ * If we observe more than MY_ROW_LIMIT unique malloc signatures, we
+ * fall through and use the traditional __FILE__ processing and don't
+ * try to de-dup them.  If your testing hits this limit, just increase
+ * it and try again.
+ */
+
+#define MY_ROW_LIMIT (1024 * 1024)
+static git_win32__crtdbg_stacktrace__row  g_cs_rows[MY_ROW_LIMIT];
+static git_win32__crtdbg_stacktrace__row *g_cs_index[MY_ROW_LIMIT];
+
+static unsigned int g_cs_end = MY_ROW_LIMIT;
+static unsigned int g_cs_ins = 0; /* insertion point == unique allocs seen */
+static unsigned int g_count_total_allocs = 0; /* number of allocs seen */
+static unsigned int g_transient_count_total_leaks = 0; /* number of total leaks */
+static unsigned int g_transient_count_dedup_leaks = 0; /* number of unique leaks */
+static bool g_limit_reached = false; /* had allocs after we filled row table */
+
+static unsigned int g_checkpoint_id = 0; /* to better label leak checkpoints */
+static bool g_transient_leaks_since_mark = false; /* payload for hook */
+
+/**
+ * Compare function for bsearch on g_cs_index table.
+ */
+static int row_cmp(const void *v1, const void *v2)
+{
+	git_win32__stack__raw_data *d1 = (git_win32__stack__raw_data*)v1;
+	git_win32__crtdbg_stacktrace__row *r2 = (git_win32__crtdbg_stacktrace__row *)v2;
+
+	return (git_win32__stack_compare(d1, &r2->raw_data));
+}
+
+/**
+ * Unique insert the new data into the row and index tables.
+ * We have to sort by the stackframe data itself, not the uid.
+ */
+static git_win32__crtdbg_stacktrace__row * insert_unique(
+	const git_win32__stack__raw_data *pdata)
+{
+	size_t pos;
+	if (git__bsearch(g_cs_index, g_cs_ins, pdata, row_cmp, &pos) < 0) {
+		/* Append new unique item to row table. */
+		memcpy(&g_cs_rows[g_cs_ins].raw_data, pdata, sizeof(*pdata));
+		sprintf(g_cs_rows[g_cs_ins].uid.uid, "##%08lx", g_cs_ins);
+
+		/* Insert pointer to it into the proper place in the index table. */
+		if (pos < g_cs_ins)
+			memmove(&g_cs_index[pos+1], &g_cs_index[pos], (g_cs_ins - pos)*sizeof(g_cs_index[0]));
+		g_cs_index[pos] = &g_cs_rows[g_cs_ins];
+
+		g_cs_ins++;
+	}
+
+	g_cs_index[pos]->count_allocs++;
+
+	return g_cs_index[pos];
+}
+
+/**
+ * Hook function to receive leak data from the CRT. (This includes
+ * both "<file_name>:(<line_number>)" data, but also each of the
+ * various headers and fields.
+ *
+ * Scan this for the special "##<pos>" UID forms that we substituted
+ * for the "<file_name>".  Map <pos> back to the row data and
+ * increment its leak count.
+ *
+ * See https://msdn.microsoft.com/en-us/library/74kabxyx.aspx
+ *
+ * We suppress the actual crtdbg output.
+ */
+static int __cdecl report_hook(int nRptType, char *szMsg, int *retVal)
+{
+	static int hook_result = TRUE; /* FALSE to get stock dump; TRUE to suppress. */
+	unsigned int pos;
+
+	*retVal = 0; /* do not invoke debugger */
+
+	if ((szMsg[0] != '#') || (szMsg[1] != '#'))
+		return hook_result;
+
+	if (sscanf(&szMsg[2], "%08lx", &pos) < 1)
+		return hook_result;
+	if (pos >= g_cs_ins)
+		return hook_result;
+
+	if (g_transient_leaks_since_mark) {
+		if (g_cs_rows[pos].count_allocs == g_cs_rows[pos].count_allocs_at_last_checkpoint)
+			return hook_result;
+	}
+
+	g_cs_rows[pos].transient_count_leaks++;
+
+	if (g_cs_rows[pos].transient_count_leaks == 1)
+		g_transient_count_dedup_leaks++;
+
+	g_transient_count_total_leaks++;
+
+	return hook_result;
+}
+
+/**
+ * Write leak data to all of the various places we need.
+ * We force the caller to sprintf() the message first
+ * because we want to avoid fprintf() because it allocs.
+ */
+static void my_output(const char *buf)
+{
+	fwrite(buf, strlen(buf), 1, stderr);
+	OutputDebugString(buf);
+}
+
+/**
+ * For each row with leaks, dump a stacktrace for it.
+ */
+static void dump_summary(const char *label)
+{
+	unsigned int k;
+	char buf[10 * 1024];
+
+	if (g_transient_count_total_leaks == 0)
+		return;
+
+	fflush(stdout);
+	fflush(stderr);
+	my_output("\n");
+
+	if (g_limit_reached) {
+		sprintf(buf,
+				"LEAK SUMMARY: de-dup row table[%d] filled. Increase MY_ROW_LIMIT.\n",
+				MY_ROW_LIMIT);
+		my_output(buf);
+	}
+
+	if (!label)
+		label = "";
+
+	if (g_transient_leaks_since_mark) {
+		sprintf(buf, "LEAK CHECKPOINT %d: leaks %d unique %d: %s\n",
+				g_checkpoint_id, g_transient_count_total_leaks, g_transient_count_dedup_leaks, label);
+		my_output(buf);
+	} else {
+		sprintf(buf, "LEAK SUMMARY: TOTAL leaks %d de-duped %d: %s\n",
+				g_transient_count_total_leaks, g_transient_count_dedup_leaks, label);
+		my_output(buf);
+	}
+	my_output("\n");
+
+	for (k = 0; k < g_cs_ins; k++) {
+		if (g_cs_rows[k].transient_count_leaks > 0) {
+			sprintf(buf, "LEAK: %s leaked %d of %d times:\n",
+					g_cs_rows[k].uid.uid,
+					g_cs_rows[k].transient_count_leaks,
+					g_cs_rows[k].count_allocs);
+			my_output(buf);
+
+			if (git_win32__stack_format(
+					buf, sizeof(buf), &g_cs_rows[k].raw_data,
+					NULL, NULL) >= 0) {
+				my_output(buf);
+			}
+
+			my_output("\n");
+		}
+	}
+
+	fflush(stderr);
+}
+
+void git_win32__crtdbg_stacktrace_init(void)
+{
+	InitializeCriticalSection(&g_crtdbg_stacktrace_cs);
+
+	EnterCriticalSection(&g_crtdbg_stacktrace_cs);
+
+	_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
+
+	_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
+	_CrtSetReportMode(_CRT_ERROR,  _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
+	_CrtSetReportMode(_CRT_WARN,   _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
+
+	_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
+	_CrtSetReportFile(_CRT_ERROR,  _CRTDBG_FILE_STDERR);
+	_CrtSetReportFile(_CRT_WARN,   _CRTDBG_FILE_STDERR);
+
+	LeaveCriticalSection(&g_crtdbg_stacktrace_cs);
+}
+
+int git_win32__crtdbg_stacktrace__dump(
+	git_win32__crtdbg_stacktrace_options opt,
+	const char *label)
+{
+	_CRT_REPORT_HOOK old;
+	unsigned int k;
+	int r = 0;
+
+#define IS_BIT_SET(o,b) (((o) & (b)) != 0)
+
+	bool b_set_mark         = IS_BIT_SET(opt, GIT_WIN32__CRTDBG_STACKTRACE__SET_MARK);
+	bool b_leaks_since_mark = IS_BIT_SET(opt, GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_SINCE_MARK);
+	bool b_leaks_total      = IS_BIT_SET(opt, GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_TOTAL);
+	bool b_quiet            = IS_BIT_SET(opt, GIT_WIN32__CRTDBG_STACKTRACE__QUIET);
+
+	if (b_leaks_since_mark && b_leaks_total) {
+		giterr_set(GITERR_INVALID, "Cannot combine LEAKS_SINCE_MARK and LEAKS_TOTAL.");
+		return GIT_ERROR;
+	}
+	if (!b_set_mark && !b_leaks_since_mark && !b_leaks_total) {
+		giterr_set(GITERR_INVALID, "Nothing to do.");
+		return GIT_ERROR;
+	}
+
+	EnterCriticalSection(&g_crtdbg_stacktrace_cs);
+
+	if (b_leaks_since_mark || b_leaks_total) {
+		/* All variables with "transient" in the name are per-dump counters
+		 * and reset before each dump.  This lets us handle checkpoints.
+		 */
+		g_transient_count_total_leaks = 0;
+		g_transient_count_dedup_leaks = 0;
+		for (k = 0; k < g_cs_ins; k++) {
+			g_cs_rows[k].transient_count_leaks = 0;
+		}
+	}
+
+	g_transient_leaks_since_mark = b_leaks_since_mark;
+
+	old = _CrtSetReportHook(report_hook);
+	_CrtDumpMemoryLeaks();
+	_CrtSetReportHook(old);
+
+	if (b_leaks_since_mark || b_leaks_total) {
+		r = g_transient_count_dedup_leaks;
+
+		if (!b_quiet)
+			dump_summary(label);
+	}
+
+	if (b_set_mark) {
+		for (k = 0; k < g_cs_ins; k++) {
+			g_cs_rows[k].count_allocs_at_last_checkpoint = g_cs_rows[k].count_allocs;
+		}
+
+		g_checkpoint_id++;
+	}
+
+	LeaveCriticalSection(&g_crtdbg_stacktrace_cs);
+
+	return r;
+}
+
+void git_win32__crtdbg_stacktrace_cleanup(void)
+{
+	/* At shutdown/cleanup, dump cummulative leak info
+	 * with everything since startup.  This might generate
+	 * extra noise if the caller has been doing checkpoint
+	 * dumps, but it might also eliminate some false
+	 * positives for resources previously reported during
+	 * checkpoints.
+	 */
+	git_win32__crtdbg_stacktrace__dump(
+		GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_TOTAL,
+		"CLEANUP");
+
+	DeleteCriticalSection(&g_crtdbg_stacktrace_cs);
+}
+
+const char *git_win32__crtdbg_stacktrace(int skip, const char *file)
+{
+	git_win32__stack__raw_data new_data;
+	git_win32__crtdbg_stacktrace__row *row;
+	const char * result = file;
+
+	if (git_win32__stack_capture(&new_data, skip+1) < 0)
+		return result;
+
+	EnterCriticalSection(&g_crtdbg_stacktrace_cs);
+
+	if (g_cs_ins < g_cs_end) {
+		row = insert_unique(&new_data);
+		result = row->uid.uid;
+	} else {
+		g_limit_reached = true;
+	}
+
+	g_count_total_allocs++;
+
+	LeaveCriticalSection(&g_crtdbg_stacktrace_cs);
+
+	return result;
+}
+#endif
diff --git a/src/win32/w32_crtdbg_stacktrace.h b/src/win32/w32_crtdbg_stacktrace.h
new file mode 100644
index 0000000..40ca60d
--- /dev/null
+++ b/src/win32/w32_crtdbg_stacktrace.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_w32_crtdbg_stacktrace_h__
+#define INCLUDE_w32_crtdbg_stacktrace_h__
+
+#if defined(GIT_MSVC_CRTDBG)
+
+/**
+ * Initialize our memory leak tracking and de-dup data structures.
+ * This should ONLY be called by git_libgit2_init().
+ */
+void git_win32__crtdbg_stacktrace_init(void);
+
+/**
+ * Shutdown our memory leak tracking and dump summary data.
+ * This should ONLY be called by git_libgit2_shutdown().
+ *
+ * We explicitly call _CrtDumpMemoryLeaks() during here so
+ * that we can compute summary data for the leaks. We print
+ * the stacktrace of each unique leak.
+ *
+ * This cleanup does not happen if the app calls exit()
+ * without calling the libgit2 shutdown code.
+ *
+ * This info we print here is independent of any automatic
+ * reporting during exit() caused by _CRTDBG_LEAK_CHECK_DF.
+ * Set it in your app if you also want traditional reporting.
+ */
+void git_win32__crtdbg_stacktrace_cleanup(void);
+
+/**
+ * Checkpoint options.
+ */
+typedef enum git_win32__crtdbg_stacktrace_options {
+	/**
+	 * Set checkpoint marker.
+	 */
+	GIT_WIN32__CRTDBG_STACKTRACE__SET_MARK         = (1 << 0),
+
+	/**
+	 * Dump leaks since last checkpoint marker.
+	 * May not be combined with __LEAKS_TOTAL.
+	 *
+	 * Note that this may generate false positives for global TLS
+	 * error state and other global caches that aren't cleaned up
+	 * until the thread/process terminates.  So when using this
+	 * around a region of interest, also check the final (at exit)
+	 * dump before digging into leaks reported here.
+	 */
+	GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_SINCE_MARK = (1 << 1),
+
+	/**
+	 * Dump leaks since init.  May not be combined
+	 * with __LEAKS_SINCE_MARK.
+	 */
+	GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_TOTAL      = (1 << 2),
+
+	/**
+	 * Suppress printing during dumps.
+	 * Just return leak count.
+	 */
+	GIT_WIN32__CRTDBG_STACKTRACE__QUIET            = (1 << 3),
+
+} git_win32__crtdbg_stacktrace_options;
+
+/**
+ * Checkpoint memory state and/or dump unique stack traces of
+ * current memory leaks.
+ *
+ * @return number of unique leaks (relative to requested starting
+ * point) or error.
+ */
+GIT_EXTERN(int) git_win32__crtdbg_stacktrace__dump(
+	git_win32__crtdbg_stacktrace_options opt,
+	const char *label);
+
+/**
+ * Construct stacktrace and append it to the global buffer.
+ * Return pointer to start of this string.  On any error or
+ * lack of buffer space, just return the given file buffer
+ * so it will behave as usual.
+ *
+ * This should ONLY be called by our internal memory allocations
+ * routines.
+ */
+const char *git_win32__crtdbg_stacktrace(int skip, const char *file);
+
+#endif
+#endif
diff --git a/src/win32/w32_stack.c b/src/win32/w32_stack.c
new file mode 100644
index 0000000..15af3dc
--- /dev/null
+++ b/src/win32/w32_stack.c
@@ -0,0 +1,192 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#if defined(GIT_MSVC_CRTDBG)
+#include "Windows.h"
+#include "Dbghelp.h"
+#include "win32/posix.h"
+#include "w32_stack.h"
+#include "hash.h"
+
+/**
+ * This is supposedly defined in WinBase.h (from Windows.h) but there were linker issues.
+ */
+USHORT WINAPI RtlCaptureStackBackTrace(ULONG, ULONG, PVOID*, PULONG);
+
+static bool   g_win32_stack_initialized = false;
+static HANDLE g_win32_stack_process = INVALID_HANDLE_VALUE;
+static git_win32__stack__aux_cb_alloc  g_aux_cb_alloc  = NULL;
+static git_win32__stack__aux_cb_lookup g_aux_cb_lookup = NULL;
+
+int git_win32__stack__set_aux_cb(
+	git_win32__stack__aux_cb_alloc cb_alloc,
+	git_win32__stack__aux_cb_lookup cb_lookup)
+{
+	g_aux_cb_alloc = cb_alloc;
+	g_aux_cb_lookup = cb_lookup;
+
+	return 0;
+}
+
+void git_win32__stack_init(void)
+{
+	if (!g_win32_stack_initialized) {
+		g_win32_stack_process = GetCurrentProcess();
+		SymSetOptions(SYMOPT_LOAD_LINES);
+		SymInitialize(g_win32_stack_process, NULL, TRUE);
+		g_win32_stack_initialized = true;
+	}
+}
+
+void git_win32__stack_cleanup(void)
+{
+	if (g_win32_stack_initialized) {
+		SymCleanup(g_win32_stack_process);
+		g_win32_stack_process = INVALID_HANDLE_VALUE;
+		g_win32_stack_initialized = false;
+	}
+}
+
+int git_win32__stack_capture(git_win32__stack__raw_data *pdata, int skip)
+{
+	if (!g_win32_stack_initialized) {
+		giterr_set(GITERR_INVALID, "git_win32_stack not initialized.");
+		return GIT_ERROR;
+	}
+
+	memset(pdata, 0, sizeof(*pdata));
+	pdata->nr_frames = RtlCaptureStackBackTrace(
+		skip+1, GIT_WIN32__STACK__MAX_FRAMES, pdata->frames, NULL);
+
+	/* If an "aux" data provider was registered, ask it to capture
+	 * whatever data it needs and give us an "aux_id" to it so that
+	 * we can refer to it later when reporting.
+	 */
+	if (g_aux_cb_alloc)
+		(g_aux_cb_alloc)(&pdata->aux_id);
+
+	return 0;
+}
+
+int git_win32__stack_compare(
+	git_win32__stack__raw_data *d1,
+	git_win32__stack__raw_data *d2)
+{
+	return memcmp(d1, d2, sizeof(*d1));
+}
+
+int git_win32__stack_format(
+	char *pbuf, int buf_len,
+	const git_win32__stack__raw_data *pdata,
+	const char *prefix, const char *suffix)
+{
+#define MY_MAX_FILENAME 255
+
+	/* SYMBOL_INFO has char FileName[1] at the end.  The docs say to
+	 * to malloc it with extra space for your desired max filename.
+	 */
+	struct {
+		SYMBOL_INFO symbol;
+		char extra[MY_MAX_FILENAME + 1];
+	} s;
+
+	IMAGEHLP_LINE64 line;
+	int buf_used = 0;
+	unsigned int k;
+	char detail[MY_MAX_FILENAME * 2]; /* filename plus space for function name and formatting */
+	int detail_len;
+
+	if (!g_win32_stack_initialized) {
+		giterr_set(GITERR_INVALID, "git_win32_stack not initialized.");
+		return GIT_ERROR;
+	}
+
+	if (!prefix)
+		prefix = "\t";
+	if (!suffix)
+		suffix = "\n";
+
+	memset(pbuf, 0, buf_len);
+
+	memset(&s, 0, sizeof(s));
+	s.symbol.MaxNameLen = MY_MAX_FILENAME;
+	s.symbol.SizeOfStruct = sizeof(SYMBOL_INFO);
+
+	memset(&line, 0, sizeof(line));
+	line.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
+
+	for (k=0; k < pdata->nr_frames; k++) {
+		DWORD64 frame_k = (DWORD64)pdata->frames[k];
+		DWORD dwUnused;
+
+		if (SymFromAddr(g_win32_stack_process, frame_k, 0, &s.symbol) &&
+			SymGetLineFromAddr64(g_win32_stack_process, frame_k, &dwUnused, &line)) {
+			const char *pslash;
+			const char *pfile;
+
+			pslash = strrchr(line.FileName, '\\');
+			pfile = ((pslash) ? (pslash+1) : line.FileName);
+			p_snprintf(detail, sizeof(detail), "%s%s:%d> %s%s",
+					   prefix, pfile, line.LineNumber, s.symbol.Name, suffix);
+		} else {
+			/* This happens when we cross into another module.
+			 * For example, in CLAR tests, this is typically
+			 * the CRT startup code.  Just print an unknown
+			 * frame and continue.
+			 */
+			p_snprintf(detail, sizeof(detail), "%s??%s", prefix, suffix);
+		}
+		detail_len = strlen(detail);
+
+		if (buf_len < (buf_used + detail_len + 1)) {
+			/* we don't have room for this frame in the buffer, so just stop. */
+			break;
+		}
+
+		memcpy(&pbuf[buf_used], detail, detail_len);
+		buf_used += detail_len;
+	}
+
+	/* "aux_id" 0 is reserved to mean no aux data. This is needed to handle
+	 * allocs that occur before the aux callbacks were registered.
+	 */
+	if (pdata->aux_id > 0) {
+		p_snprintf(detail, sizeof(detail), "%saux_id: %d%s",
+				   prefix, pdata->aux_id, suffix);
+		detail_len = strlen(detail);
+		if ((buf_used + detail_len + 1) < buf_len) {
+			memcpy(&pbuf[buf_used], detail, detail_len);
+			buf_used += detail_len;
+		}
+
+		/* If an "aux" data provider is still registered, ask it to append its detailed
+		 * data to the end of ours using the "aux_id" it gave us when this de-duped
+		 * item was created.
+		 */
+		if (g_aux_cb_lookup)
+			(g_aux_cb_lookup)(pdata->aux_id, &pbuf[buf_used], (buf_len - buf_used - 1));
+	}
+
+	return GIT_OK;
+}
+
+int git_win32__stack(
+	char * pbuf, int buf_len,
+	int skip,
+	const char *prefix, const char *suffix)
+{
+	git_win32__stack__raw_data data;
+	int error;
+
+	if ((error = git_win32__stack_capture(&data, skip)) < 0)
+		return error;
+	if ((error = git_win32__stack_format(pbuf, buf_len, &data, prefix, suffix)) < 0)
+		return error;
+	return 0;
+}
+
+#endif
diff --git a/src/win32/w32_stack.h b/src/win32/w32_stack.h
new file mode 100644
index 0000000..21170bd
--- /dev/null
+++ b/src/win32/w32_stack.h
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_w32_stack_h__
+#define INCLUDE_w32_stack_h__
+
+#if defined(GIT_MSVC_CRTDBG)
+
+/**
+ * This type defines a callback to be used to augment a C stacktrace
+ * with "aux" data. This can be used, for example, to allow LibGit2Sharp
+ * (or other interpreted consumer libraries) to give us C# stacktrace
+ * data for the PInvoke.
+ *
+ * This callback will be called during crtdbg-instrumented allocs.
+ *
+ * @param aux_id [out] A returned "aux_id" representing a unique
+ * (de-duped at the C# layer) stacktrace.  "aux_id" 0 is reserved
+ * to mean no aux stacktrace data.
+ */
+typedef void (*git_win32__stack__aux_cb_alloc)(unsigned int *aux_id);
+
+/**
+ * This type defines a callback to be used to augment the output of
+ * a stacktrace.  This will be used to request the C# layer format
+ * the C# stacktrace associated with "aux_id" into the provided
+ * buffer.
+ *
+ * This callback will be called during leak reporting.
+ *
+ * @param aux_id The "aux_id" key associated with a stacktrace.
+ * @param aux_msg A buffer where a formatted message should be written.
+ * @param aux_msg_len The size of the buffer.
+ */
+typedef void (*git_win32__stack__aux_cb_lookup)(unsigned int aux_id, char *aux_msg, unsigned int aux_msg_len);
+
+/**
+ * Register an "aux" data provider to augment our C stacktrace data.
+ *
+ * This can be used, for example, to allow LibGit2Sharp (or other
+ * interpreted consumer libraries) to give us the C# stacktrace of
+ * the PInvoke.
+ *
+ * If you choose to use this feature, it should be registered during
+ * initialization and not changed for the duration of the process.
+ */
+GIT_EXTERN(int) git_win32__stack__set_aux_cb(
+	git_win32__stack__aux_cb_alloc cb_alloc,
+	git_win32__stack__aux_cb_lookup cb_lookup);
+
+/**
+ * Maximum number of stackframes to record for a
+ * single stacktrace.
+ */
+#define GIT_WIN32__STACK__MAX_FRAMES 30
+
+/**
+ * Wrapper containing the raw unprocessed stackframe
+ * data for a single stacktrace and any "aux_id".
+ *
+ * I put the aux_id first so leaks will be sorted by it.
+ * So, for example, if a specific callstack in C# leaks
+ * a repo handle, all of the pointers within the associated
+ * repo pointer will be grouped together.
+ */
+typedef struct {
+	unsigned int aux_id;
+	unsigned int nr_frames;
+	void *frames[GIT_WIN32__STACK__MAX_FRAMES];
+} git_win32__stack__raw_data;
+
+
+/**
+ * Load symbol table data.  This should be done in the primary
+ * thread at startup (under a lock if there are other threads
+ * active).
+ */
+void git_win32__stack_init(void);
+
+/**
+ * Cleanup symbol table data.  This should be done in the
+ * primary thead at shutdown (under a lock if there are other
+ * threads active).
+ */
+void git_win32__stack_cleanup(void);
+
+
+/**
+ * Capture raw stack trace data for the current process/thread.
+ *
+ * @param skip Number of initial frames to skip.  Pass 0 to
+ * begin with the caller of this routine. Pass 1 to begin
+ * with its caller.  And so on.
+ */
+int git_win32__stack_capture(git_win32__stack__raw_data *pdata, int skip);
+
+/**
+ * Compare 2 raw stacktraces with the usual -1,0,+1 result.
+ * This includes any "aux_id" values in the comparison, so that
+ * our de-dup is also "aux" context relative.
+ */
+int git_win32__stack_compare(
+	git_win32__stack__raw_data *d1,
+	git_win32__stack__raw_data *d2);
+
+/**
+ * Format raw stacktrace data into buffer WITHOUT using any mallocs.
+ *
+ * @param prefix String written before each frame; defaults to "\t".
+ * @param suffix String written after each frame; defaults to "\n".
+ */
+int git_win32__stack_format(
+	char *pbuf, int buf_len,
+	const git_win32__stack__raw_data *pdata,
+	const char *prefix, const char *suffix);
+
+/**
+ * Convenience routine to capture and format stacktrace into
+ * a buffer WITHOUT using any mallocs.  This is primarily a
+ * wrapper for testing.
+ *
+ * @param skip Number of initial frames to skip. Pass 0 to
+ * begin with the caller of this routine.  Pass 1 to begin
+ * with its caller.  And so on.
+ * @param prefix String written before each frame; defaults to "\t".
+ * @param suffix String written after each frame; defaults to "\n".
+ */
+int git_win32__stack(
+	char * pbuf, int buf_len,
+	int skip,
+	const char *prefix, const char *suffix);
+
+#endif /* GIT_MSVC_CRTDBG */
+#endif /* INCLUDE_w32_stack_h__ */
diff --git a/src/xdiff/xdiff.h b/src/xdiff/xdiff.h
index cb8b235..e2f1e89 100644
--- a/src/xdiff/xdiff.h
+++ b/src/xdiff/xdiff.h
@@ -32,14 +32,14 @@ extern "C" {
 #define XDF_IGNORE_WHITESPACE (1 << 2)
 #define XDF_IGNORE_WHITESPACE_CHANGE (1 << 3)
 #define XDF_IGNORE_WHITESPACE_AT_EOL (1 << 4)
+#define XDF_WHITESPACE_FLAGS (XDF_IGNORE_WHITESPACE | XDF_IGNORE_WHITESPACE_CHANGE | XDF_IGNORE_WHITESPACE_AT_EOL)
+
 #define XDF_PATIENCE_DIFF (1 << 5)
 #define XDF_HISTOGRAM_DIFF (1 << 6)
-#define XDF_WHITESPACE_FLAGS (XDF_IGNORE_WHITESPACE | XDF_IGNORE_WHITESPACE_CHANGE | XDF_IGNORE_WHITESPACE_AT_EOL)
+#define XDF_DIFF_ALGORITHM_MASK (XDF_PATIENCE_DIFF | XDF_HISTOGRAM_DIFF)
+#define XDF_DIFF_ALG(x) ((x) & XDF_DIFF_ALGORITHM_MASK)
 
-#define XDL_PATCH_NORMAL '-'
-#define XDL_PATCH_REVERSE '+'
-#define XDL_PATCH_MODEMASK ((1 << 8) - 1)
-#define XDL_PATCH_IGNOREBSPACE (1 << 8)
+#define XDF_IGNORE_BLANK_LINES (1 << 7)
 
 #define XDL_EMIT_FUNCNAMES (1 << 0)
 #define XDL_EMIT_COMMON (1 << 1)
@@ -88,13 +88,17 @@ typedef struct s_xdemitcb {
 
 typedef long (*find_func_t)(const char *line, long line_len, char *buffer, long buffer_size, void *priv);
 
+typedef int (*xdl_emit_hunk_consume_func_t)(long start_a, long count_a,
+					    long start_b, long count_b,
+					    void *cb_data);
+
 typedef struct s_xdemitconf {
 	long ctxlen;
 	long interhunkctxlen;
 	unsigned long flags;
 	find_func_t find_func;
 	void *find_func_priv;
-	void (*emit_func)(void);
+	xdl_emit_hunk_consume_func_t hunk_func;
 } xdemitconf_t;
 
 typedef struct s_bdiffparam {
diff --git a/src/xdiff/xdiffi.c b/src/xdiff/xdiffi.c
index 84aa0fc..0620e5f 100644
--- a/src/xdiff/xdiffi.c
+++ b/src/xdiff/xdiffi.c
@@ -328,10 +328,10 @@ int xdl_do_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
 	xdalgoenv_t xenv;
 	diffdata_t dd1, dd2;
 
-	if (xpp->flags & XDF_PATIENCE_DIFF)
+	if (XDF_DIFF_ALG(xpp->flags) == XDF_PATIENCE_DIFF)
 		return xdl_do_patience_diff(mf1, mf2, xpp, xe);
 
-	if (xpp->flags & XDF_HISTOGRAM_DIFF)
+	if (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF)
 		return xdl_do_histogram_diff(mf1, mf2, xpp, xe);
 
 	if (xdl_prepare_env(mf1, mf2, xpp, xe) < 0) {
@@ -394,6 +394,7 @@ static xdchange_t *xdl_add_change(xdchange_t *xscr, long i1, long i2, long chg1,
 	xch->i2 = i2;
 	xch->chg1 = chg1;
 	xch->chg2 = chg2;
+	xch->ignore = 0;
 
 	return xch;
 }
@@ -538,13 +539,51 @@ void xdl_free_script(xdchange_t *xscr) {
 	}
 }
 
+static int xdl_call_hunk_func(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
+			      xdemitconf_t const *xecfg)
+{
+	xdchange_t *xch, *xche;
+
+	(void)xe;
+
+	for (xch = xscr; xch; xch = xche->next) {
+		xche = xdl_get_hunk(&xch, xecfg);
+		if (!xch)
+			break;
+		if (xecfg->hunk_func(xch->i1, xche->i1 + xche->chg1 - xch->i1,
+				     xch->i2, xche->i2 + xche->chg2 - xch->i2,
+				     ecb->priv) < 0)
+			return -1;
+	}
+	return 0;
+}
+
+static void xdl_mark_ignorable(xdchange_t *xscr, xdfenv_t *xe, long flags)
+{
+	xdchange_t *xch;
+
+	for (xch = xscr; xch; xch = xch->next) {
+		int ignore = 1;
+		xrecord_t **rec;
+		long i;
+
+		rec = &xe->xdf1.recs[xch->i1];
+		for (i = 0; i < xch->chg1 && ignore; i++)
+			ignore = xdl_blankline(rec[i]->ptr, rec[i]->size, flags);
+
+		rec = &xe->xdf2.recs[xch->i2];
+		for (i = 0; i < xch->chg2 && ignore; i++)
+			ignore = xdl_blankline(rec[i]->ptr, rec[i]->size, flags);
+
+		xch->ignore = ignore;
+	}
+}
 
 int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
 	     xdemitconf_t const *xecfg, xdemitcb_t *ecb) {
 	xdchange_t *xscr;
 	xdfenv_t xe;
-	emit_func_t ef = xecfg->emit_func ?
-		(emit_func_t)xecfg->emit_func : xdl_emit_diff;
+	emit_func_t ef = xecfg->hunk_func ? xdl_call_hunk_func : xdl_emit_diff;
 
 	if (xdl_do_diff(mf1, mf2, xpp, &xe) < 0) {
 
@@ -558,6 +597,9 @@ int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
 		return -1;
 	}
 	if (xscr) {
+		if (xpp->flags & XDF_IGNORE_BLANK_LINES)
+			xdl_mark_ignorable(xscr, &xe, xpp->flags);
+
 		if (ef(&xe, xscr, ecb, xecfg) < 0) {
 
 			xdl_free_script(xscr);
diff --git a/src/xdiff/xdiffi.h b/src/xdiff/xdiffi.h
index 7a92ea9..8b81206 100644
--- a/src/xdiff/xdiffi.h
+++ b/src/xdiff/xdiffi.h
@@ -41,6 +41,7 @@ typedef struct s_xdchange {
 	struct s_xdchange *next;
 	long i1, i2;
 	long chg1, chg2;
+	int ignore;
 } xdchange_t;
 
 
diff --git a/src/xdiff/xemit.c b/src/xdiff/xemit.c
index e3e63d9..600fd1f 100644
--- a/src/xdiff/xemit.c
+++ b/src/xdiff/xemit.c
@@ -56,16 +56,51 @@ static int xdl_emit_record(xdfile_t *xdf, long ri, char const *pre, xdemitcb_t *
 /*
  * Starting at the passed change atom, find the latest change atom to be included
  * inside the differential hunk according to the specified configuration.
+ * Also advance xscr if the first changes must be discarded.
  */
-xdchange_t *xdl_get_hunk(xdchange_t *xscr, xdemitconf_t const *xecfg) {
-	xdchange_t *xch, *xchp;
+xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg)
+{
+	xdchange_t *xch, *xchp, *lxch;
 	long max_common = 2 * xecfg->ctxlen + xecfg->interhunkctxlen;
+	long max_ignorable = xecfg->ctxlen;
+	unsigned long ignored = 0; /* number of ignored blank lines */
+
+	/* remove ignorable changes that are too far before other changes */
+	for (xchp = *xscr; xchp && xchp->ignore; xchp = xchp->next) {
+		xch = xchp->next;
+
+		if (xch == NULL ||
+		    xch->i1 - (xchp->i1 + xchp->chg1) >= max_ignorable)
+			*xscr = xch;
+	}
+
+	if (*xscr == NULL)
+		return NULL;
+
+	lxch = *xscr;
 
-	for (xchp = xscr, xch = xscr->next; xch; xchp = xch, xch = xch->next)
-		if (xch->i1 - (xchp->i1 + xchp->chg1) > max_common)
+	for (xchp = *xscr, xch = xchp->next; xch; xchp = xch, xch = xch->next) {
+		long distance = xch->i1 - (xchp->i1 + xchp->chg1);
+		if (distance > max_common)
 			break;
 
-	return xchp;
+		if (distance < max_ignorable && (!xch->ignore || lxch == xchp)) {
+			lxch = xch;
+			ignored = 0;
+		} else if (distance < max_ignorable && xch->ignore) {
+			ignored += xch->chg2;
+		} else if (lxch != xchp &&
+			   xch->i1 + ignored - (lxch->i1 + lxch->chg1) > (unsigned long)max_common) {
+			break;
+		} else if (!xch->ignore) {
+			lxch = xch;
+			ignored = 0;
+		} else {
+			ignored += xch->chg2;
+		}
+	}
+
+	return lxch;
 }
 
 
@@ -144,7 +179,9 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
 		return xdl_emit_common(xe, xscr, ecb, xecfg);
 
 	for (xch = xscr; xch; xch = xche->next) {
-		xche = xdl_get_hunk(xch, xecfg);
+		xche = xdl_get_hunk(&xch, xecfg);
+		if (!xch)
+			break;
 
 		s1 = XDL_MAX(xch->i1 - xecfg->ctxlen, 0);
 		s2 = XDL_MAX(xch->i2 - xecfg->ctxlen, 0);
diff --git a/src/xdiff/xemit.h b/src/xdiff/xemit.h
index c2e2e83..d297107 100644
--- a/src/xdiff/xemit.h
+++ b/src/xdiff/xemit.h
@@ -27,7 +27,7 @@
 typedef int (*emit_func_t)(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
 			   xdemitconf_t const *xecfg);
 
-xdchange_t *xdl_get_hunk(xdchange_t *xscr, xdemitconf_t const *xecfg);
+xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg);
 int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
 		  xdemitconf_t const *xecfg);
 
diff --git a/src/xdiff/xhistogram.c b/src/xdiff/xhistogram.c
index c848128..500d811 100644
--- a/src/xdiff/xhistogram.c
+++ b/src/xdiff/xhistogram.c
@@ -258,7 +258,7 @@ static int fall_back_to_classic_diff(struct histindex *index,
 		int line1, int count1, int line2, int count2)
 {
 	xpparam_t xpp;
-	xpp.flags = index->xpp->flags & ~XDF_HISTOGRAM_DIFF;
+	xpp.flags = index->xpp->flags & ~XDF_DIFF_ALGORITHM_MASK;
 
 	return xdl_fall_back_diff(index->env, &xpp,
 				  line1, count1, line2, count2);
diff --git a/src/xdiff/xmerge.c b/src/xdiff/xmerge.c
index 84e4246..b11e598 100644
--- a/src/xdiff/xmerge.c
+++ b/src/xdiff/xmerge.c
@@ -245,11 +245,11 @@ static int xdl_fill_merge_buffer(xdfenv_t *xe1, const char *name1,
 					      dest ? dest + size : NULL);
 			/* Postimage from side #1 */
 			if (m->mode & 1)
-				size += xdl_recs_copy(xe1, m->i1, m->chg1, 1,
+				size += xdl_recs_copy(xe1, m->i1, m->chg1, (m->mode & 2),
 						      dest ? dest + size : NULL);
 			/* Postimage from side #2 */
 			if (m->mode & 2)
-				size += xdl_recs_copy(xe2, m->i2, m->chg2, 1,
+				size += xdl_recs_copy(xe2, m->i2, m->chg2, 0,
 						      dest ? dest + size : NULL);
 		} else
 			continue;
diff --git a/src/xdiff/xpatience.c b/src/xdiff/xpatience.c
index fdd7d02..04e1a1a 100644
--- a/src/xdiff/xpatience.c
+++ b/src/xdiff/xpatience.c
@@ -288,7 +288,7 @@ static int fall_back_to_classic_diff(struct hashmap *map,
 		int line1, int count1, int line2, int count2)
 {
 	xpparam_t xpp;
-	xpp.flags = map->xpp->flags & ~XDF_PATIENCE_DIFF;
+	xpp.flags = map->xpp->flags & ~XDF_DIFF_ALGORITHM_MASK;
 
 	return xdl_fall_back_diff(map->env, &xpp,
 				  line1, count1, line2, count2);
diff --git a/src/xdiff/xprepare.c b/src/xdiff/xprepare.c
index e419f4f..63a22c6 100644
--- a/src/xdiff/xprepare.c
+++ b/src/xdiff/xprepare.c
@@ -181,7 +181,7 @@ static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_
 	if (!(recs = (xrecord_t **) xdl_malloc(narec * sizeof(xrecord_t *))))
 		goto abort;
 
-	if (xpp->flags & XDF_HISTOGRAM_DIFF)
+	if (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF)
 		hbits = hsize = 0;
 	else {
 		hbits = xdl_hashbits((unsigned int) narec);
@@ -209,8 +209,8 @@ static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_
 			crec->ha = hav;
 			recs[nrec++] = crec;
 
-			if (!(xpp->flags & XDF_HISTOGRAM_DIFF) &&
-				xdl_classify_record(pass, cf, rhash, hbits, crec) < 0)
+			if ((XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF) &&
+			    xdl_classify_record(pass, cf, rhash, hbits, crec) < 0)
 				goto abort;
 		}
 	}
@@ -273,16 +273,15 @@ int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
 	 * (nrecs) will be updated correctly anyway by
 	 * xdl_prepare_ctx().
 	 */
-	sample = xpp->flags & XDF_HISTOGRAM_DIFF ? XDL_GUESS_NLINES2 : XDL_GUESS_NLINES1;
+	sample = (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF
+		  ? XDL_GUESS_NLINES2 : XDL_GUESS_NLINES1);
 
 	enl1 = xdl_guess_lines(mf1, sample) + 1;
 	enl2 = xdl_guess_lines(mf2, sample) + 1;
 
-	if (!(xpp->flags & XDF_HISTOGRAM_DIFF) &&
-		xdl_init_classifier(&cf, enl1 + enl2 + 1, xpp->flags) < 0) {
-
+	if (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF &&
+	    xdl_init_classifier(&cf, enl1 + enl2 + 1, xpp->flags) < 0)
 		return -1;
-	}
 
 	if (xdl_prepare_ctx(1, mf1, enl1, xpp, &cf, &xe->xdf1) < 0) {
 
@@ -296,9 +295,9 @@ int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
 		return -1;
 	}
 
-	if (!(xpp->flags & XDF_PATIENCE_DIFF) &&
-			!(xpp->flags & XDF_HISTOGRAM_DIFF) &&
-			xdl_optimize_ctxs(&cf, &xe->xdf1, &xe->xdf2) < 0) {
+	if ((XDF_DIFF_ALG(xpp->flags) != XDF_PATIENCE_DIFF) &&
+	    (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF) &&
+	    xdl_optimize_ctxs(&cf, &xe->xdf1, &xe->xdf2) < 0) {
 
 		xdl_free_ctx(&xe->xdf2);
 		xdl_free_ctx(&xe->xdf1);
diff --git a/src/xdiff/xutils.c b/src/xdiff/xutils.c
index bb7bdee..30f2a30 100644
--- a/src/xdiff/xutils.c
+++ b/src/xdiff/xutils.c
@@ -120,35 +120,6 @@ void *xdl_cha_alloc(chastore_t *cha) {
 	return data;
 }
 
-
-void *xdl_cha_first(chastore_t *cha) {
-	chanode_t *sncur;
-
-	if (!(cha->sncur = sncur = cha->head))
-		return NULL;
-
-	cha->scurr = 0;
-
-	return (char *) sncur + sizeof(chanode_t) + cha->scurr;
-}
-
-
-void *xdl_cha_next(chastore_t *cha) {
-	chanode_t *sncur;
-
-	if (!(sncur = cha->sncur))
-		return NULL;
-	cha->scurr += cha->isize;
-	if (cha->scurr == sncur->icurr) {
-		if (!(sncur = cha->sncur = sncur->next))
-			return NULL;
-		cha->scurr = 0;
-	}
-
-	return (char *) sncur + sizeof(chanode_t) + cha->scurr;
-}
-
-
 long xdl_guess_lines(mmfile_t *mf, long sample) {
 	long nl = 0, size, tsize = 0;
 	char const *data, *cur, *top;
@@ -170,6 +141,19 @@ long xdl_guess_lines(mmfile_t *mf, long sample) {
 	return nl + 1;
 }
 
+int xdl_blankline(const char *line, long size, long flags)
+{
+	long i;
+
+	if (!(flags & XDF_WHITESPACE_FLAGS))
+		return (size <= 1);
+
+	for (i = 0; i < size && XDL_ISSPACE(line[i]); i++)
+		;
+
+	return (i == size);
+}
+
 int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags)
 {
 	int i1, i2;
diff --git a/src/xdiff/xutils.h b/src/xdiff/xutils.h
index 714719a..8f952a8 100644
--- a/src/xdiff/xutils.h
+++ b/src/xdiff/xutils.h
@@ -34,6 +34,7 @@ void *xdl_cha_alloc(chastore_t *cha);
 void *xdl_cha_first(chastore_t *cha);
 void *xdl_cha_next(chastore_t *cha);
 long xdl_guess_lines(mmfile_t *mf, long sample);
+int xdl_blankline(const char *line, long size, long flags);
 int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags);
 unsigned long xdl_hash_record(char const **data, char const *top, long flags);
 unsigned int xdl_hashbits(unsigned int size);
diff --git a/tests/blame/blame_helpers.c b/tests/blame/blame_helpers.c
index 21cd1a6..b305ba1 100644
--- a/tests/blame/blame_helpers.c
+++ b/tests/blame/blame_helpers.c
@@ -4,7 +4,7 @@ void hunk_message(size_t idx, const git_blame_hunk *hunk, const char *fmt, ...)
 {
 	va_list arglist;
 
-	printf("Hunk %zd (line %d +%d): ", idx,
+	printf("Hunk %"PRIuZ" (line %d +%d): ", idx,
 			hunk->final_start_line_number, hunk->lines_in_hunk-1);
 
 	va_start(arglist, fmt);
diff --git a/tests/clar_libgit2.c b/tests/clar_libgit2.c
index f73fc5b..cc687ba 100644
--- a/tests/clar_libgit2.c
+++ b/tests/clar_libgit2.c
@@ -486,8 +486,8 @@ void clar__assert_equal_file(
 			for (pos = 0; pos < bytes && expected_data[pos] == buf[pos]; ++pos)
 				/* find differing byte offset */;
 			p_snprintf(
-				buf, sizeof(buf), "file content mismatch at byte %d",
-				(int)(total_bytes + pos));
+				buf, sizeof(buf), "file content mismatch at byte %"PRIdZ,
+				(ssize_t)(total_bytes + pos));
 			p_close(fd);
 			clar__fail(file, line, path, buf, 1);
 		}
diff --git a/tests/clar_libgit2_trace.c b/tests/clar_libgit2_trace.c
index ae582d1..aaeeb78 100644
--- a/tests/clar_libgit2_trace.c
+++ b/tests/clar_libgit2_trace.c
@@ -142,9 +142,28 @@ void _cl_trace_cb__event_handler(
 	switch (ev) {
 	case CL_TRACE__SUITE_BEGIN:
 		git_trace(GIT_TRACE_TRACE, "\n\n%s\n%s: Begin Suite", HR, suite_name);
+#if 0 && defined(GIT_MSVC_CRTDBG)
+		git_win32__crtdbg_stacktrace__dump(
+			GIT_WIN32__CRTDBG_STACKTRACE__SET_MARK,
+			suite_name);
+#endif
 		break;
 
 	case CL_TRACE__SUITE_END:
+#if 0 && defined(GIT_MSVC_CRTDBG)
+		/* As an example of checkpointing, dump leaks within this suite.
+		 * This may generate false positives for things like the global
+		 * TLS error state and maybe the odb cache since they aren't
+		 * freed until the global shutdown and outside the scope of this
+		 * set of tests.
+		 *
+		 * This may under-report if the test itself uses a checkpoint.
+		 * See tests/trace/windows/stacktrace.c
+		 */
+		git_win32__crtdbg_stacktrace__dump(
+			GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_SINCE_MARK,
+			suite_name);
+#endif
 		git_trace(GIT_TRACE_TRACE, "\n\n%s: End Suite\n%s", suite_name, HR);
 		break;
 
diff --git a/tests/diff/index.c b/tests/diff/index.c
index f702568..df45ad2 100644
--- a/tests/diff/index.c
+++ b/tests/diff/index.c
@@ -268,3 +268,35 @@ void test_diff_index__not_in_head_conflicted(void)
 	git_index_free(index);
 	git_tree_free(a);
 }
+
+void test_diff_index__to_index(void)
+{
+	const char *a_commit = "26a125ee1bf"; /* the current HEAD */
+	git_tree *old_tree;
+	git_index *old_index;
+	git_index *new_index;
+	git_diff *diff;
+	diff_expects exp;
+
+	cl_git_pass(git_index_new(&old_index));
+	old_tree = resolve_commit_oid_to_tree(g_repo, a_commit);
+	cl_git_pass(git_index_read_tree(old_index, old_tree));
+
+	cl_git_pass(git_repository_index(&new_index, g_repo));
+
+	cl_git_pass(git_diff_index_to_index(&diff, g_repo, old_index, new_index, NULL));
+
+	memset(&exp, 0, sizeof(diff_expects));
+	cl_git_pass(git_diff_foreach(
+		diff, diff_file_cb, diff_binary_cb, diff_hunk_cb, diff_line_cb, &exp));
+	cl_assert_equal_i(8, exp.files);
+	cl_assert_equal_i(3, exp.file_status[GIT_DELTA_ADDED]);
+	cl_assert_equal_i(2, exp.file_status[GIT_DELTA_DELETED]);
+	cl_assert_equal_i(3, exp.file_status[GIT_DELTA_MODIFIED]);
+	cl_assert_equal_i(0, exp.file_status[GIT_DELTA_CONFLICTED]);
+
+	git_diff_free(diff);
+	git_index_free(new_index);
+	git_index_free(old_index);
+	git_tree_free(old_tree);
+}
diff --git a/tests/filter/custom.c b/tests/filter/custom.c
index 493d26c..fd1cd27 100644
--- a/tests/filter/custom.c
+++ b/tests/filter/custom.c
@@ -5,6 +5,7 @@
 #include "buf_text.h"
 #include "git2/sys/filter.h"
 #include "git2/sys/repository.h"
+#include "custom_helpers.h"
 
 /* going TO_WORKDIR, filters are executed low to high
  * going TO_ODB, filters are executed high to low
@@ -12,8 +13,6 @@
 #define BITFLIP_FILTER_PRIORITY -1
 #define REVERSE_FILTER_PRIORITY -2
 
-#define VERY_SECURE_ENCRYPTION(b) ((b) ^ 0xff)
-
 #ifdef GIT_WIN32
 # define NEWLINE "\r\n"
 #else
@@ -27,6 +26,8 @@ static char workdir_data[] =
 	"trivially" NEWLINE
 	"scrambled." NEWLINE;
 
+#define REVERSED_DATA_LEN 51
+
 /* Represents the data above scrambled (bits flipped) after \r\n -> \n
  * conversion, then bytewise reversed
  */
@@ -63,107 +64,6 @@ void test_filter_custom__cleanup(void)
 	g_repo = NULL;
 }
 
-static int bitflip_filter_apply(
-	git_filter     *self,
-	void          **payload,
-	git_buf        *to,
-	const git_buf  *from,
-	const git_filter_source *source)
-{
-	const unsigned char *src = (const unsigned char *)from->ptr;
-	unsigned char *dst;
-	size_t i;
-
-	GIT_UNUSED(self); GIT_UNUSED(payload);
-
-	/* verify that attribute path match worked as expected */
-	cl_assert_equal_i(
-		0, git__strncmp("hero", git_filter_source_path(source), 4));
-
-	if (!from->size)
-		return 0;
-
-	cl_git_pass(git_buf_grow(to, from->size));
-
-	dst = (unsigned char *)to->ptr;
-
-	for (i = 0; i < from->size; i++)
-		dst[i] = VERY_SECURE_ENCRYPTION(src[i]);
-
-	to->size = from->size;
-
-	return 0;
-}
-
-static void bitflip_filter_free(git_filter *f)
-{
-	git__free(f);
-}
-
-static git_filter *create_bitflip_filter(void)
-{
-	git_filter *filter = git__calloc(1, sizeof(git_filter));
-	cl_assert(filter);
-
-	filter->version = GIT_FILTER_VERSION;
-	filter->attributes = "+bitflip";
-	filter->shutdown = bitflip_filter_free;
-	filter->apply = bitflip_filter_apply;
-
-	return filter;
-}
-
-
-static int reverse_filter_apply(
-	git_filter     *self,
-	void          **payload,
-	git_buf        *to,
-	const git_buf  *from,
-	const git_filter_source *source)
-{
-	const unsigned char *src = (const unsigned char *)from->ptr;
-	const unsigned char *end = src + from->size;
-	unsigned char *dst;
-
-	GIT_UNUSED(self); GIT_UNUSED(payload); GIT_UNUSED(source);
-
-	/* verify that attribute path match worked as expected */
-	cl_assert_equal_i(
-		0, git__strncmp("hero", git_filter_source_path(source), 4));
-
-	if (!from->size)
-		return 0;
-
-	cl_git_pass(git_buf_grow(to, from->size));
-
-	dst = (unsigned char *)to->ptr + from->size - 1;
-
-	while (src < end)
-		*dst-- = *src++;
-
-	to->size = from->size;
-
-	return 0;
-}
-
-static void reverse_filter_free(git_filter *f)
-{
-	git__free(f);
-}
-
-static git_filter *create_reverse_filter(const char *attrs)
-{
-	git_filter *filter = git__calloc(1, sizeof(git_filter));
-	cl_assert(filter);
-
-	filter->version = GIT_FILTER_VERSION;
-	filter->attributes = attrs;
-	filter->shutdown = reverse_filter_free;
-	filter->apply = reverse_filter_apply;
-
-	return filter;
-}
-
 static void register_custom_filters(void)
 {
 	static int filters_registered = 0;
@@ -186,7 +86,6 @@ static void register_custom_filters(void)
 	}
 }
 
-
 void test_filter_custom__to_odb(void)
 {
 	git_filter_list *fl;
diff --git a/tests/filter/custom_helpers.c b/tests/filter/custom_helpers.c
new file mode 100644
index 0000000..2c80212
--- /dev/null
+++ b/tests/filter/custom_helpers.c
@@ -0,0 +1,108 @@
+#include "clar_libgit2.h"
+#include "posix.h"
+#include "filter.h"
+#include "buf_text.h"
+#include "git2/sys/filter.h"
+
+#define VERY_SECURE_ENCRYPTION(b) ((b) ^ 0xff)
+
+int bitflip_filter_apply(
+	git_filter     *self,
+	void          **payload,
+	git_buf        *to,
+	const git_buf  *from,
+	const git_filter_source *source)
+{
+	const unsigned char *src = (const unsigned char *)from->ptr;
+	unsigned char *dst;
+	size_t i;
+
+	GIT_UNUSED(self); GIT_UNUSED(payload);
+
+	/* verify that attribute path match worked as expected */
+	cl_assert_equal_i(
+		0, git__strncmp("hero", git_filter_source_path(source), 4));
+
+	if (!from->size)
+		return 0;
+
+	cl_git_pass(git_buf_grow(to, from->size));
+
+	dst = (unsigned char *)to->ptr;
+
+	for (i = 0; i < from->size; i++)
+		dst[i] = VERY_SECURE_ENCRYPTION(src[i]);
+
+	to->size = from->size;
+
+	return 0;
+}
+
+static void bitflip_filter_free(git_filter *f)
+{
+	git__free(f);
+}
+
+git_filter *create_bitflip_filter(void)
+{
+	git_filter *filter = git__calloc(1, sizeof(git_filter));
+	cl_assert(filter);
+
+	filter->version = GIT_FILTER_VERSION;
+	filter->attributes = "+bitflip";
+	filter->shutdown = bitflip_filter_free;
+	filter->apply = bitflip_filter_apply;
+
+	return filter;
+}
+
+
+int reverse_filter_apply(
+	git_filter     *self,
+	void          **payload,
+	git_buf        *to,
+	const git_buf  *from,
+	const git_filter_source *source)
+{
+	const unsigned char *src = (const unsigned char *)from->ptr;
+	const unsigned char *end = src + from->size;
+	unsigned char *dst;
+
+	GIT_UNUSED(self); GIT_UNUSED(payload); GIT_UNUSED(source);
+
+	/* verify that attribute path match worked as expected */
+	cl_assert_equal_i(
+		0, git__strncmp("hero", git_filter_source_path(source), 4));
+
+	if (!from->size)
+		return 0;
+
+	cl_git_pass(git_buf_grow(to, from->size));
+
+	dst = (unsigned char *)to->ptr + from->size - 1;
+
+	while (src < end)
+		*dst-- = *src++;
+
+	to->size = from->size;
+
+	return 0;
+}
+
+static void reverse_filter_free(git_filter *f)
+{
+	git__free(f);
+}
+
+git_filter *create_reverse_filter(const char *attrs)
+{
+	git_filter *filter = git__calloc(1, sizeof(git_filter));
+	cl_assert(filter);
+
+	filter->version = GIT_FILTER_VERSION;
+	filter->attributes = attrs;
+	filter->shutdown = reverse_filter_free;
+	filter->apply = reverse_filter_apply;
+
+	return filter;
+}
diff --git a/tests/filter/custom_helpers.h b/tests/filter/custom_helpers.h
new file mode 100644
index 0000000..13cfb23
--- /dev/null
+++ b/tests/filter/custom_helpers.h
@@ -0,0 +1,18 @@
+#include "git2/sys/filter.h"
+
+extern git_filter *create_bitflip_filter(void);
+extern git_filter *create_reverse_filter(const char *attr);
+
+extern int bitflip_filter_apply(
+	git_filter     *self,
+	void          **payload,
+	git_buf        *to,
+	const git_buf  *from,
+	const git_filter_source *source);
+
+extern int reverse_filter_apply(
+	git_filter     *self,
+	void          **payload,
+	git_buf        *to,
+	const git_buf  *from,
+	const git_filter_source *source);
diff --git a/tests/filter/stream.c b/tests/filter/stream.c
index 9228911..30f5e50 100644
--- a/tests/filter/stream.c
+++ b/tests/filter/stream.c
@@ -25,6 +25,7 @@ void test_filter_stream__cleanup(void)
 	g_repo = NULL;
 
 	git_filter_unregister("compress");
+	git__free(compress_filter);
 }
 
 #define CHUNKSIZE 10240
@@ -123,11 +124,6 @@ static int compress_filter_stream_init(
 	return 0;
 }
 
-static void compress_filter_free(git_filter *f)
-{
-	git__free(f);
-}
-
 git_filter *create_compress_filter(void)
 {
 	git_filter *filter = git__calloc(1, sizeof(git_filter));
@@ -136,7 +132,6 @@ git_filter *create_compress_filter(void)
 	filter->version = GIT_FILTER_VERSION;
 	filter->attributes = "+compress";
 	filter->stream = compress_filter_stream_init;
-	filter->shutdown = compress_filter_free;
 
 	return filter;
 }
diff --git a/tests/filter/wildcard.c b/tests/filter/wildcard.c
new file mode 100644
index 0000000..999b336
--- /dev/null
+++ b/tests/filter/wildcard.c
@@ -0,0 +1,184 @@
+#include "clar_libgit2.h"
+#include "posix.h"
+#include "blob.h"
+#include "filter.h"
+#include "buf_text.h"
+#include "git2/sys/filter.h"
+#include "git2/sys/repository.h"
+#include "custom_helpers.h"
+
+static git_repository *g_repo = NULL;
+
+static git_filter *create_wildcard_filter(void);
+
+#define DATA_LEN 32
+
+static unsigned char input[] = {
+	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+};
+
+static unsigned char reversed[] = {
+	0x1f, 0x1e, 0x1d, 0x1c, 0x1b, 0x1a, 0x19, 0x18,
+	0x17, 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x10,
+	0x0f, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0x08,
+	0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00,
+};
+
+static unsigned char flipped[] = {
+	0xff, 0xfe, 0xfd, 0xfc, 0xfb, 0xfa, 0xf9, 0xf8,
+	0xf7, 0xf6, 0xf5, 0xf4, 0xf3, 0xf2, 0xf1, 0xf0,
+	0xef, 0xee, 0xed, 0xec, 0xeb, 0xea, 0xe9, 0xe8,
+	0xe7, 0xe6, 0xe5, 0xe4, 0xe3, 0xe2, 0xe1, 0xe0,
+};
+
+void test_filter_wildcard__initialize(void)
+{
+	cl_git_pass(git_filter_register(
+		"wildcard", create_wildcard_filter(), GIT_FILTER_DRIVER_PRIORITY));
+
+	g_repo = cl_git_sandbox_init("empty_standard_repo");
+
+	cl_git_rewritefile(
+		"empty_standard_repo/.gitattributes",
+		"* binary\n"
+		"hero-flip-* filter=wcflip\n"
+		"hero-reverse-* filter=wcreverse\n"
+		"none-* filter=unregistered\n");
+}
+
+void test_filter_wildcard__cleanup(void)
+{
+	cl_git_pass(git_filter_unregister("wildcard"));
+
+	cl_git_sandbox_cleanup();
+	g_repo = NULL;
+}
+
+static int wildcard_filter_check(
+	git_filter  *self,
+	void **payload,
+	const git_filter_source *src,
+	const char **attr_values)
+{
+	GIT_UNUSED(self);
+	GIT_UNUSED(src);
+
+	if (strcmp(attr_values[0], "wcflip") == 0 ||
+		strcmp(attr_values[0], "wcreverse") == 0) {
+		*payload = git__strdup(attr_values[0]);
+		GITERR_CHECK_ALLOC(*payload);
+		return 0;
+	}
+
+	return GIT_PASSTHROUGH;
+}
+
+static int wildcard_filter_apply(
+	git_filter     *self,
+	void          **payload,
+	git_buf        *to,
+	const git_buf  *from,
+	const git_filter_source *source)
+{
+	const char *filtername = *payload;
+
+	if (filtername && strcmp(filtername, "wcflip") == 0)
+		return bitflip_filter_apply(self, payload, to, from, source);
+	else if (filtername && strcmp(filtername, "wcreverse") == 0)
+		return reverse_filter_apply(self, payload, to, from, source);
+
+	cl_fail("Unexpected attribute");
+	return GIT_PASSTHROUGH;
+}
+
+static void wildcard_filter_cleanup(git_filter *self, void *payload)
+{
+	GIT_UNUSED(self);
+	git__free(payload);
+}
+
+static void wildcard_filter_free(git_filter *f)
+{
+	git__free(f);
+}
+
+static git_filter *create_wildcard_filter(void)
+{
+	git_filter *filter = git__calloc(1, sizeof(git_filter));
+	cl_assert(filter);
+
+	filter->version = GIT_FILTER_VERSION;
+	filter->attributes = "filter=*";
+	filter->check = wildcard_filter_check;
+	filter->apply = wildcard_filter_apply;
+	filter->cleanup = wildcard_filter_cleanup;
+	filter->shutdown = wildcard_filter_free;
+
+	return filter;
+}
+
+void test_filter_wildcard__reverse(void)
+{
+	git_filter_list *fl;
+	git_buf in = GIT_BUF_INIT, out = GIT_BUF_INIT;
+
+	cl_git_pass(git_filter_list_load(
+		&fl, g_repo, NULL, "hero-reverse-foo", GIT_FILTER_TO_ODB, 0));
+
+	cl_git_pass(git_buf_put(&in, (char *)input, DATA_LEN));
+	cl_git_pass(git_filter_list_apply_to_data(&out, fl, &in));
+
+	cl_assert_equal_i(DATA_LEN, out.size);
+
+	cl_assert_equal_i(
+		0, memcmp(reversed, out.ptr, out.size));
+
+	git_filter_list_free(fl);
+	git_buf_free(&out);
+	git_buf_free(&in);
+}
+
+void test_filter_wildcard__flip(void)
+{
+	git_filter_list *fl;
+	git_buf in = GIT_BUF_INIT, out = GIT_BUF_INIT;
+
+	cl_git_pass(git_filter_list_load(
+		&fl, g_repo, NULL, "hero-flip-foo", GIT_FILTER_TO_ODB, 0));
+
+	cl_git_pass(git_buf_put(&in, (char *)input, DATA_LEN));
+	cl_git_pass(git_filter_list_apply_to_data(&out, fl, &in));
+
+	cl_assert_equal_i(DATA_LEN, out.size);
+
+	cl_assert_equal_i(
+		0, memcmp(flipped, out.ptr, out.size));
+
+	git_filter_list_free(fl);
+	git_buf_free(&out);
+	git_buf_free(&in);
+}
+
+void test_filter_wildcard__none(void)
+{
+	git_filter_list *fl;
+	git_buf in = GIT_BUF_INIT, out = GIT_BUF_INIT;
+
+	cl_git_pass(git_filter_list_load(
+		&fl, g_repo, NULL, "none-foo", GIT_FILTER_TO_ODB, 0));
+
+	cl_git_pass(git_buf_put(&in, (char *)input, DATA_LEN));
+	cl_git_pass(git_filter_list_apply_to_data(&out, fl, &in));
+
+	cl_assert_equal_i(DATA_LEN, out.size);
+
+	cl_assert_equal_i(
+		0, memcmp(input, out.ptr, out.size));
+
+	git_filter_list_free(fl);
+	git_buf_free(&out);
+	git_buf_free(&in);
+}
diff --git a/tests/main.c b/tests/main.c
index 56326da..f67c8ff 100644
--- a/tests/main.c
+++ b/tests/main.c
@@ -1,10 +1,3 @@
-
-#if defined(GIT_MSVC_CRTDBG)
-/* Enable MSVC CRTDBG memory leak reporting.  See src/util.h for details. */
-#include <stdlib.h>
-#include <crtdbg.h>
-#endif
-
 #include "clar_libgit2.h"
 #include "clar_libgit2_trace.h"
 
@@ -16,18 +9,6 @@ int main(int argc, char *argv[])
 {
 	int res;
 
-#if defined(GIT_MSVC_CRTDBG)
-	_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
-
-	_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
-	_CrtSetReportMode(_CRT_ERROR,  _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
-	_CrtSetReportMode(_CRT_WARN,   _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
-
-	_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
-	_CrtSetReportFile(_CRT_ERROR,  _CRTDBG_FILE_STDERR);
-	_CrtSetReportFile(_CRT_WARN,   _CRTDBG_FILE_STDERR);
-#endif
-
 	clar_test_init(argc, argv);
 
 	git_libgit2_init();
diff --git a/tests/merge/files.c b/tests/merge/files.c
index 7f461ab..2fd90d0 100644
--- a/tests/merge/files.c
+++ b/tests/merge/files.c
@@ -249,3 +249,42 @@ void test_merge_files__automerge_whitespace_change(void)
 
 	git_merge_file_result_free(&result);
 }
+
+void test_merge_files__doesnt_add_newline(void)
+{
+	git_merge_file_input ancestor = GIT_MERGE_FILE_INPUT_INIT,
+		ours = GIT_MERGE_FILE_INPUT_INIT,
+		theirs = GIT_MERGE_FILE_INPUT_INIT;
+	git_merge_file_options opts = GIT_MERGE_FILE_OPTIONS_INIT;
+	git_merge_file_result result = {0};
+	const char *expected = "Zero\n1\n2\n3\n4\n5 XXX\n6 YYY\n7\n8\n9\nTen";
+
+	ancestor.ptr = "0\n1\n2\n3\n4\n5 XXX\n6YYY\n7\n8\n9\n10";
+	ancestor.size = strlen(ancestor.ptr);
+	ancestor.path = "testfile.txt";
+	ancestor.mode = 0100755;
+
+	ours.ptr = "Zero\n1\n2\n3\n4\n5 XXX\n6 YYY\n7\n8\n9\n10";
+	ours.size = strlen(ours.ptr);
+	ours.path = "testfile.txt";
+	ours.mode = 0100755;
+
+	theirs.ptr = "0\n1\n2\n3\n4\n5 XXX\n6  YYY\n7\n8\n9\nTen";
+	theirs.size = strlen(theirs.ptr);
+	theirs.path = "testfile.txt";
+	theirs.mode = 0100755;
+
+	opts.flags |= GIT_MERGE_FILE_IGNORE_WHITESPACE_CHANGE;
+	cl_git_pass(git_merge_file(&result, &ancestor, &ours, &theirs, &opts));
+
+	cl_assert_equal_i(1, result.automergeable);
+
+	cl_assert_equal_s("testfile.txt", result.path);
+	cl_assert_equal_i(0100755, result.mode);
+
+	cl_assert_equal_i(strlen(expected), result.len);
+	cl_assert_equal_strn(expected, result.ptr, result.len);
+
+	git_merge_file_result_free(&result);
+}
+
diff --git a/tests/merge/merge_helpers.c b/tests/merge/merge_helpers.c
index 33710f4..f814714 100644
--- a/tests/merge/merge_helpers.c
+++ b/tests/merge/merge_helpers.c
@@ -110,7 +110,7 @@ void merge__dump_index_entries(git_vector *index_entries)
 	size_t i;
 	const git_index_entry *index_entry;
 
-	printf ("\nINDEX [%d]:\n", (int)index_entries->length);
+	printf ("\nINDEX [%"PRIuZ"]:\n", index_entries->length);
 	for (i = 0; i < index_entries->length; i++) {
 		index_entry = index_entries->contents[i];
 
diff --git a/tests/revert/workdir.c b/tests/revert/workdir.c
index 7ccf0f9..9f83bd8 100644
--- a/tests/revert/workdir.c
+++ b/tests/revert/workdir.c
@@ -334,16 +334,18 @@ void test_revert_workdir__again_after_edit_two(void)
 	cl_assert(merge_test_index(repo_index, merge_index_entries, 3));
 
 	cl_git_pass(git_futils_readbuffer(&diff_buf, "revert/file.txt"));
-	cl_assert(strcmp(diff_buf.ptr,	"a\n" \
-		"<<<<<<< HEAD\n" \
-		"=======\n" \
-		"a\n" \
-		">>>>>>> parent of 97e52d5... Revert me\n" \
-		"a\n" \
-		"a\n" \
-		"a\n" \
-		"a\n" \
-		"ab\n") == 0);
+	cl_assert_equal_s(
+			"a\n" \
+			"<<<<<<< HEAD\n" \
+			"=======\n" \
+			"a\n" \
+			">>>>>>> parent of 97e52d5... Revert me\n" \
+			"a\n" \
+			"a\n" \
+			"a\n" \
+			"a\n" \
+			"ab",
+		diff_buf.ptr);
 
 	git_commit_free(revert_commit);
 	git_commit_free(head_commit);
diff --git a/tests/submodule/lookup.c b/tests/submodule/lookup.c
index cddbdcf..9b2b3aa 100644
--- a/tests/submodule/lookup.c
+++ b/tests/submodule/lookup.c
@@ -1,6 +1,7 @@
 #include "clar_libgit2.h"
 #include "submodule_helpers.h"
 #include "git2/sys/repository.h"
+#include "repository.h"
 #include "fileops.h"
 
 static git_repository *g_repo = NULL;
@@ -103,8 +104,25 @@ static int sm_lookup_cb(git_submodule *sm, const char *name, void *payload)
 
 void test_submodule_lookup__foreach(void)
 {
+	git_config *cfg;
 	sm_lookup_data data;
+
+	memset(&data, 0, sizeof(data));
+	cl_git_pass(git_submodule_foreach(g_repo, sm_lookup_cb, &data));
+	cl_assert_equal_i(8, data.count);
+
 	memset(&data, 0, sizeof(data));
+
+	/* Change the path for a submodule so it doesn't match the name */
+	cl_git_pass(git_config_open_ondisk(&cfg, "submod2/.gitmodules"));
+
+	cl_git_pass(git_config_set_string(cfg, "submodule.smchangedindex.path", "sm_changed_index"));
+	cl_git_pass(git_config_set_string(cfg, "submodule.smchangedindex.url", "../submod2_target"));
+	cl_git_pass(git_config_delete_entry(cfg, "submodule.sm_changed_index.path"));
+	cl_git_pass(git_config_delete_entry(cfg, "submodule.sm_changed_index.url"));
+
+	git_config_free(cfg);
+
 	cl_git_pass(git_submodule_foreach(g_repo, sm_lookup_cb, &data));
 	cl_assert_equal_i(8, data.count);
 }
@@ -269,3 +287,26 @@ void test_submodule_lookup__just_added(void)
 	refute_submodule_exists(g_repo, "sm_just_added_head", GIT_EEXISTS);
 }
 
+/* Test_App and Test_App2 are fairly similar names, make sure we load the right one */
+void test_submodule_lookup__prefix_name(void)
+{
+	git_submodule *sm;
+
+	cl_git_rewritefile("submod2/.gitmodules",
+			   "[submodule \"Test_App\"]\n"
+			   "    path = Test_App\n"
+			   "    url = ../Test_App\n"
+			   "[submodule \"Test_App2\"]\n"
+			   "    path = Test_App2\n"
+			   "    url = ../Test_App\n");
+
+	cl_git_pass(git_submodule_lookup(&sm, g_repo, "Test_App"));
+	cl_assert_equal_s("Test_App", git_submodule_name(sm));
+
+	git_submodule_free(sm);
+
+	cl_git_pass(git_submodule_lookup(&sm, g_repo, "Test_App2"));
+	cl_assert_equal_s("Test_App2", git_submodule_name(sm));
+
+	git_submodule_free(sm);
+}
diff --git a/tests/submodule/nosubs.c b/tests/submodule/nosubs.c
index 538825c..8a73dc1 100644
--- a/tests/submodule/nosubs.c
+++ b/tests/submodule/nosubs.c
@@ -71,8 +71,6 @@ void test_submodule_nosubs__add_and_delete(void)
 	git_submodule *sm;
 	git_buf buf = GIT_BUF_INIT;
 
-	/* note lack of calls to git_submodule_reload_all - this *should* work */
-
 	cl_git_fail(git_submodule_lookup(NULL, repo, "libgit2"));
 	cl_git_fail(git_submodule_lookup(NULL, repo, "submodules/libgit2"));
 
diff --git a/tests/trace/windows/stacktrace.c b/tests/trace/windows/stacktrace.c
new file mode 100644
index 0000000..c00c1b7
--- /dev/null
+++ b/tests/trace/windows/stacktrace.c
@@ -0,0 +1,151 @@
+#include "clar_libgit2.h"
+#include "win32/w32_stack.h"
+
+#if defined(GIT_MSVC_CRTDBG)
+static void a(void)
+{
+	char buf[10000];
+
+	cl_assert(git_win32__stack(buf, sizeof(buf), 0, NULL, NULL) == 0);
+
+#if 0
+	fprintf(stderr, "Stacktrace from [%s:%d]:\n%s\n", __FILE__, __LINE__, buf);
+#endif
+}
+
+static void b(void)
+{
+	a();
+}
+
+static void c(void)
+{
+	b();
+}
+#endif
+
+void test_trace_windows_stacktrace__basic(void)
+{
+#if defined(GIT_MSVC_CRTDBG)
+	c();
+#endif
+}
+
+
+void test_trace_windows_stacktrace__leaks(void)
+{
+#if defined(GIT_MSVC_CRTDBG)
+	void * p1;
+	void * p2;
+	void * p3;
+	void * p4;
+	int before, after;
+	int leaks;
+	int error;
+
+	/* remember outstanding leaks due to set setup
+	 * and set mark/checkpoint.
+	 */
+	before = git_win32__crtdbg_stacktrace__dump(
+		GIT_WIN32__CRTDBG_STACKTRACE__QUIET |
+		GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_TOTAL |
+		GIT_WIN32__CRTDBG_STACKTRACE__SET_MARK,
+		NULL);
+
+	p1 = git__malloc(5);
+	leaks = git_win32__crtdbg_stacktrace__dump(
+		GIT_WIN32__CRTDBG_STACKTRACE__QUIET |
+		GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_SINCE_MARK,
+		"p1");
+	cl_assert((leaks == 1));
+
+	p2 = git__malloc(5);
+	leaks = git_win32__crtdbg_stacktrace__dump(
+		GIT_WIN32__CRTDBG_STACKTRACE__QUIET |
+		GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_SINCE_MARK,
+		"p1,p2");
+	cl_assert((leaks == 2));
+
+	p3 = git__malloc(5);
+	leaks = git_win32__crtdbg_stacktrace__dump(
+		GIT_WIN32__CRTDBG_STACKTRACE__QUIET |
+		GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_SINCE_MARK,
+		"p1,p2,p3");
+	cl_assert((leaks == 3));
+
+	git__free(p2);
+	leaks = git_win32__crtdbg_stacktrace__dump(
+		GIT_WIN32__CRTDBG_STACKTRACE__QUIET |
+		GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_SINCE_MARK,
+		"p1,p3");
+	cl_assert((leaks == 2));
+
+	/* move the mark. only new leaks should appear afterwards */
+	error = git_win32__crtdbg_stacktrace__dump(
+		GIT_WIN32__CRTDBG_STACKTRACE__SET_MARK,
+		NULL);
+	cl_assert((error == 0));
+
+	leaks = git_win32__crtdbg_stacktrace__dump(
+		GIT_WIN32__CRTDBG_STACKTRACE__QUIET |
+		GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_SINCE_MARK,
+		"not_p1,not_p3");
+	cl_assert((leaks == 0));
+
+	p4 = git__malloc(5);
+	leaks = git_win32__crtdbg_stacktrace__dump(
+		GIT_WIN32__CRTDBG_STACKTRACE__QUIET |
+		GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_SINCE_MARK,
+		"p4,not_p1,not_p3");
+	cl_assert((leaks == 1));
+
+	git__free(p1);
+	git__free(p3);
+	leaks = git_win32__crtdbg_stacktrace__dump(
+		GIT_WIN32__CRTDBG_STACKTRACE__QUIET |
+		GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_SINCE_MARK,
+		"p4");
+	cl_assert((leaks == 1));
+
+	git__free(p4);
+	leaks = git_win32__crtdbg_stacktrace__dump(
+		GIT_WIN32__CRTDBG_STACKTRACE__QUIET |
+		GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_SINCE_MARK,
+		"end");
+	cl_assert((leaks == 0));
+
+	/* confirm current absolute leaks count matches beginning value. */
+	after = git_win32__crtdbg_stacktrace__dump(
+		GIT_WIN32__CRTDBG_STACKTRACE__QUIET |
+		GIT_WIN32__CRTDBG_STACKTRACE__LEAKS_TOTAL,
+		"total");
+	cl_assert((before == after));
+#endif
+}
+
+#if defined(GIT_MSVC_CRTDBG)
+static void aux_cb_alloc__1(unsigned int *aux_id)
+{
+	static unsigned int aux_counter = 0;
+
+	*aux_id = aux_counter++;
+}
+
+static void aux_cb_lookup__1(unsigned int aux_id, char *aux_msg, unsigned int aux_msg_len)
+{
+	p_snprintf(aux_msg, aux_msg_len, "\tQQ%08x\n", aux_id);
+}
+
+#endif
+
+void test_trace_windows_stacktrace__aux1(void)
+{
+#if defined(GIT_MSVC_CRTDBG)
+	git_win32__stack__set_aux_cb(aux_cb_alloc__1, aux_cb_lookup__1);
+	c();
+	c();
+	c();
+	c();
+	git_win32__stack__set_aux_cb(NULL, NULL);
+#endif
+}