thodg/libgit2

diff --git a/src/branch.c b/src/branch.c
index 1ebaf8e..7c88872 100644
--- a/src/branch.c
+++ b/src/branch.c
@@ -66,16 +66,22 @@ int git_branch_create(
 
 	assert(branch_name && commit && ref_out);
 	assert(git_object_owner((const git_object *)commit) == repository);
-	if (git_branch_lookup(&branch, repository, branch_name, GIT_BRANCH_LOCAL) == 0) {
-		if ((is_head = git_branch_is_head(branch)) < 0) {
-			error = is_head;
+
+	if (force && git_branch_lookup(&branch, repository, branch_name, GIT_BRANCH_LOCAL) == 0) {
+		error = git_branch_is_head(branch);
+		git_reference_free(branch);
+		branch = NULL;
+
+		if (error < 0)
 			goto cleanup;
-		}
+
+		is_head = error;
 	}
 
 	if (is_head && force) {
 		giterr_set(GITERR_REFERENCE, "Cannot force update branch '%s' as it is "
-			"the current HEAD of the repository.", git_reference_name(branch));
+			"the current HEAD of the repository.", branch_name);
+		error = -1;
 		goto cleanup;
 	}
 	
diff --git a/src/commit.c b/src/commit.c
index 2f5a5b5..255debe 100644
--- a/src/commit.c
+++ b/src/commit.c
@@ -455,19 +455,18 @@ int git_commit_nth_gen_ancestor(
 
 	assert(ancestor && commit);
 
-	current = (git_commit *)commit;
+	if (git_object_dup((git_object **) &current, (git_object *) commit) < 0)
+		return -1;
 
-	if (n == 0)
-		return git_commit_lookup(
-			ancestor,
-			commit->object.repo,
-			git_object_id((const git_object *)commit));
+	if (n == 0) {
+		*ancestor = current;
+		return 0;
+	}
 
 	while (n--) {
-		error = git_commit_parent(&parent, (git_commit *)current, 0);
+		error = git_commit_parent(&parent, current, 0);
 
-		if (current != commit)
-			git_commit_free(current);
+		git_commit_free(current);
 
 		if (error < 0)
 			return error;
diff --git a/src/refdb_fs.c b/src/refdb_fs.c
index 3219b05..8a26bec 100644
--- a/src/refdb_fs.c
+++ b/src/refdb_fs.c
@@ -1343,7 +1343,10 @@ static int refdb_reflog_fs__ensure_log(git_refdb_backend *_backend, const char *
 	if ((error = retrieve_reflog_path(&path, repo, name)) < 0)
 		return error;
 
-	return create_new_reflog_file(git_buf_cstr(&path));
+	error = create_new_reflog_file(git_buf_cstr(&path));
+	git_buf_free(&path);
+
+	return error;
 }
 
 static int has_reflog(git_repository *repo, const char *name)
diff --git a/src/reset.c b/src/reset.c
index 07fd088..2a78d31 100644
--- a/src/reset.c
+++ b/src/reset.c
@@ -167,6 +167,7 @@ cleanup:
 	git_object_free(commit);
 	git_index_free(index);
 	git_tree_free(tree);
+	git_buf_free(&log_message_buf);
 
 	return error;
 }
diff --git a/src/transports/local.c b/src/transports/local.c
index 26ada48..f8d511e 100644
--- a/src/transports/local.c
+++ b/src/transports/local.c
@@ -194,6 +194,9 @@ static int local_connect(
 	GIT_UNUSED(cred_acquire_cb);
 	GIT_UNUSED(cred_acquire_payload);
 
+	if (t->connected)
+		return 0;
+
 	t->url = git__strdup(url);
 	GITERR_CHECK_ALLOC(t->url);
 	t->direction = direction;
diff --git a/tests/clone/empty.c b/tests/clone/empty.c
index 78aef7d..8f60710 100644
--- a/tests/clone/empty.c
+++ b/tests/clone/empty.c
@@ -53,11 +53,13 @@ void test_clone_empty__can_clone_an_empty_local_repo_barely(void)
 	cl_git_pass(git_branch_upstream_name(&buf, g_repo_cloned, local_name));
 
 	cl_assert_equal_s(expected_tracked_branch_name, buf.ptr);
+	git_buf_free(&buf);
 
 	/* ...and the name of the remote... */
 	cl_git_pass(git_branch_remote_name(&buf, g_repo_cloned, expected_tracked_branch_name));
 
 	cl_assert_equal_s(expected_remote_name, buf.ptr);
+	git_buf_free(&buf);
 
 	/* ...even when the remote HEAD is unborn as well */
 	cl_assert_equal_i(GIT_ENOTFOUND, git_reference_lookup(&ref, g_repo_cloned,
diff --git a/tests/odb/backend/nobackend.c b/tests/odb/backend/nobackend.c
index 7ed5acc..783641e 100644
--- a/tests/odb/backend/nobackend.c
+++ b/tests/odb/backend/nobackend.c
@@ -18,6 +18,11 @@ void test_odb_backend_nobackend__initialize(void)
 	git_repository_set_config(_repo, config);
 	git_repository_set_odb(_repo, odb);
 	git_repository_set_refdb(_repo, refdb);
+
+	/* The set increases the refcount and we don't want them anymore */
+	git_config_free(config);
+	git_odb_free(odb);
+	git_refdb_free(refdb);
 }
 
 void test_odb_backend_nobackend__cleanup(void)
diff --git a/tests/reset/hard.c b/tests/reset/hard.c
index d4c7db4..36120ee 100644
--- a/tests/reset/hard.c
+++ b/tests/reset/hard.c
@@ -212,12 +212,16 @@ void test_reset_hard__reflog_is_correct(void)
 	reflog_check(repo, "HEAD", 3, "emeric.fermas@gmail.com", exp_msg);
 	reflog_check(repo, "refs/heads/master", 3, "emeric.fermas@gmail.com", exp_msg);
 
+	git_object_free(target);
+
 	/* Moved branch, expect default message */
 	cl_git_pass(git_revparse_single(&target, repo, "HEAD~^{commit}"));
 	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL, NULL));
 	reflog_check(repo, "HEAD", 3, "emeric.fermas@gmail.com", exp_msg);
 	reflog_check(repo, "refs/heads/master", 4, NULL, "reset: moving");
 
+	git_object_free(target);
+
 	/* Moved branch, expect custom message */
 	cl_git_pass(git_revparse_single(&target, repo, "HEAD~^{commit}"));
 	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL, "message1"));
diff --git a/tests/reset/mixed.c b/tests/reset/mixed.c
index 25272a7..5d8ff63 100644
--- a/tests/reset/mixed.c
+++ b/tests/reset/mixed.c
@@ -61,12 +61,18 @@ void test_reset_mixed__reflog_is_correct(void)
 	reflog_check(repo, "HEAD", 9, "yoram.harmelin@gmail.com", exp_msg);
 	reflog_check(repo, "refs/heads/master", 9, "yoram.harmelin@gmail.com", exp_msg);
 
+	git_object_free(target);
+	target = NULL;
+
 	/* Moved branch, expect default message */
 	cl_git_pass(git_revparse_single(&target, repo, "HEAD~^{commit}"));
 	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL, NULL));
 	reflog_check(repo, "HEAD", 9, "yoram.harmelin@gmail.com", exp_msg);
 	reflog_check(repo, "refs/heads/master", 10, NULL, "reset: moving");
 
+	git_object_free(target);
+	target = NULL;
+
 	/* Moved branch, expect custom message */
 	cl_git_pass(git_revparse_single(&target, repo, "HEAD~^{commit}"));
 	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL, "message1"));