thodg/libgit2

diff --git a/script/coverity.sh b/script/coverity.sh
index 8c82689..7fe9eb4 100755
--- a/script/coverity.sh
+++ b/script/coverity.sh
@@ -49,10 +49,24 @@ COVERITY_UNSUPPORTED=1 \
 # Upload results
 tar czf libgit2.tgz cov-int
 SHA=$(git rev-parse --short HEAD)
-curl \
+
+HTML="$(curl \
+	--silent \
+	--write-out "\n%{http_code}" \
 	--form token="$COVERITY_TOKEN" \
 	--form email=bs@github.com \
 	--form file=@libgit2.tgz \
 	--form version="$SHA" \
 	--form description="Travis build" \
-	https://scan.coverity.com/builds?project=libgit2
+	https://scan.coverity.com/builds?project=libgit2)"
+# Body is everything up to the last line
+BODY="$(echo "$HTML" | head -n-1)"
+# Status code is the last line
+STATUS_CODE="$(echo "$HTML" | tail -n1)"
+
+echo "${BODY}"
+
+if [ "${STATUS_CODE}" != "201" ]; then
+	echo "Received error code ${STATUS_CODE} from Coverity"
+	exit 1
+fi
diff --git a/src/config_file.c b/src/config_file.c
index 5f5e309..65971b9 100644
--- a/src/config_file.c
+++ b/src/config_file.c
@@ -1032,6 +1032,11 @@ static int parse_section_header_ext(struct reader *reader, const char *line, con
 	 */
 
 	first_quote = strchr(line, '"');
+	if (first_quote == NULL) {
+		set_parse_error(reader, 0, "Missing quotation marks in section header");
+		return -1;
+	}
+
 	last_quote = strrchr(line, '"');
 	quoted_len = last_quote - first_quote;
 
diff --git a/src/describe.c b/src/describe.c
index 48f04e8..13ddad5 100644
--- a/src/describe.c
+++ b/src/describe.c
@@ -582,7 +582,8 @@ static int describe(
 	best = (struct possible_tag *)git_vector_get(&all_matches, 0);
 
 	if (gave_up_on) {
-		git_pqueue_insert(&list, gave_up_on);
+		if ((error = git_pqueue_insert(&list, gave_up_on)) < 0)
+			goto cleanup;
 		seen_commits--;
 	}
 	if ((error = finish_depth_computation(
diff --git a/src/diff_tform.c b/src/diff_tform.c
index 8577f06..6a6a628 100644
--- a/src/diff_tform.c
+++ b/src/diff_tform.c
@@ -261,7 +261,7 @@ static int normalize_find_opts(
 	if (!given ||
 		 (given->flags & GIT_DIFF_FIND_ALL) == GIT_DIFF_FIND_BY_CONFIG)
 	{
-		if (diff->repo) {
+		if (cfg) {
 			char *rule =
 				git_config__get_string_force(cfg, "diff.renames", "true");
 			int boolval;
@@ -318,8 +318,10 @@ static int normalize_find_opts(
 #undef USE_DEFAULT
 
 	if (!opts->rename_limit) {
-		opts->rename_limit = git_config__get_int_force(
-			cfg, "diff.renamelimit", DEFAULT_RENAME_LIMIT);
+		if (cfg) {
+			opts->rename_limit = git_config__get_int_force(
+				cfg, "diff.renamelimit", DEFAULT_RENAME_LIMIT);
+		}
 
 		if (opts->rename_limit <= 0)
 			opts->rename_limit = DEFAULT_RENAME_LIMIT;
diff --git a/src/index.c b/src/index.c
index b97f809..62aacf9 100644
--- a/src/index.c
+++ b/src/index.c
@@ -963,14 +963,20 @@ static int index_entry_reuc_init(git_index_reuc_entry **reuc_out,
 	*reuc_out = reuc = reuc_entry_alloc(path);
 	GITERR_CHECK_ALLOC(reuc);
 
-	if ((reuc->mode[0] = ancestor_mode) > 0)
+	if ((reuc->mode[0] = ancestor_mode) > 0) {
+		assert(ancestor_oid);
 		git_oid_cpy(&reuc->oid[0], ancestor_oid);
+	}
 
-	if ((reuc->mode[1] = our_mode) > 0)
+	if ((reuc->mode[1] = our_mode) > 0) {
+		assert(our_oid);
 		git_oid_cpy(&reuc->oid[1], our_oid);
+	}
 
-	if ((reuc->mode[2] = their_mode) > 0)
+	if ((reuc->mode[2] = their_mode) > 0) {
+		assert(their_oid);
 		git_oid_cpy(&reuc->oid[2], their_oid);
+	}
 
 	return 0;
 }
diff --git a/src/object.c b/src/object.c
index ebf77fb..1d45f9f 100644
--- a/src/object.c
+++ b/src/object.c
@@ -12,6 +12,7 @@
 #include "commit.h"
 #include "tree.h"
 #include "blob.h"
+#include "oid.h"
 #include "tag.h"
 
 bool git_object__strict_input_validation = true;
@@ -166,13 +167,9 @@ int git_object_lookup_prefix(
 			error = git_odb_read(&odb_obj, odb, id);
 		}
 	} else {
-		git_oid short_oid;
+		git_oid short_oid = {{ 0 }};
 
-		/* We copy the first len*4 bits from id and fill the remaining with 0s */
-		memcpy(short_oid.id, id->id, (len + 1) / 2);
-		if (len % 2)
-			short_oid.id[len / 2] &= 0xF0;
-		memset(short_oid.id + (len + 1) / 2, 0, (GIT_OID_HEXSZ - len) / 2);
+		git_oid__cpy_prefix(&short_oid, id, len);
 
 		/* If len < GIT_OID_HEXSZ (a strict short oid was given), we have
 		 * 2 options :
diff --git a/src/pack-objects.c b/src/pack-objects.c
index 46fe8f3..11e13f7 100644
--- a/src/pack-objects.c
+++ b/src/pack-objects.c
@@ -848,8 +848,10 @@ static int try_delta(git_packbuilder *pb, struct unpacked *trg,
 
 		git_packbuilder__cache_unlock(pb);
 
-		if (overflow)
+		if (overflow) {
+			git__free(delta_buf);
 			return -1;
+		}
 
 		trg_object->delta_data = git__realloc(delta_buf, delta_size);
 		GITERR_CHECK_ALLOC(trg_object->delta_data);
diff --git a/src/submodule.c b/src/submodule.c
index 38db415..3f39b9e 100644
--- a/src/submodule.c
+++ b/src/submodule.c
@@ -80,7 +80,8 @@ static kh_inline int str_equal_no_trailing_slash(const char *a, const char *b)
 	if (blen > 0 && b[blen - 1] == '/')
 		blen--;
 
-	return (alen == blen && strncmp(a, b, alen) == 0);
+	return (alen == 0 && blen == 0) ||
+		(alen == blen && strncmp(a, b, alen) == 0);
 }
 
 __KHASH_IMPL(