thodg/libgit2

diff --git a/src/diff_driver.c b/src/diff_driver.c
index e9f63cb..8e9131f 100644
--- a/src/diff_driver.c
+++ b/src/diff_driver.c
@@ -389,13 +389,13 @@ int git_diff_driver_lookup(
 
 void git_diff_driver_free(git_diff_driver *driver)
 {
-	size_t i;
+	git_diff_driver_pattern *pat;
 
 	if (!driver)
 		return;
 
-	for (i = 0; i < git_array_size(driver->fn_patterns); ++i)
-		git_regexp_dispose(& git_array_get(driver->fn_patterns, i)->re);
+	while ((pat = git_array_pop(driver->fn_patterns)) != NULL)
+		git_regexp_dispose(&pat->re);
 	git_array_clear(driver->fn_patterns);
 
 	git_regexp_dispose(&driver->word_pattern);
diff --git a/src/tree.c b/src/tree.c
index 76821e3..b1df79e 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -1251,8 +1251,9 @@ int git_tree_create_updated(git_oid *out, git_repository *repo, git_tree *baseli
 			}
 			case GIT_TREE_UPDATE_REMOVE:
 			{
+				tree_stack_entry *last = git_array_last(stack);
 				char *basename = git_path_basename(update->path);
-				error = git_treebuilder_remove(git_array_last(stack)->bld, basename);
+				error = git_treebuilder_remove(last->bld, basename);
 				git__free(basename);
 				break;
 			}