tree: plug leaks in the tree updater

Author: carlosmn

src/tree.c

@@ -1216,22 +1216,29 @@ int git_tree_create_updated(git_oid *out, git_repository *repo, git_tree *baseli
 			{
 				/* Make sure we're replacing something of the same type */
 				tree_stack_entry *last = git_array_last(stack);
-				const char *basename = git_path_basename(update->path);
+				char *basename = git_path_basename(update->path);
 				const git_tree_entry *e = git_treebuilder_get(last->bld, basename);
 				if (e && git_tree_entry_type(e) != git_object__type_from_filemode(update->filemode)) {
+					git__free(basename);
 					giterr_set(GITERR_TREE, "Cannot replace '%s' with '%s' at '%s'",
 						   git_object_type2string(git_tree_entry_type(e)),
 						   git_object_type2string(git_object__type_from_filemode(update->filemode)),
 						   update->path);
-					return -1;
+					error = -1;
+					goto cleanup;
 				}
 
 				error = git_treebuilder_insert(NULL, last->bld, basename, &update->id, update->filemode);
+				git__free(basename);
 				break;
 			}
 			case GIT_TREE_UPDATE_REMOVE:
-				error = git_treebuilder_remove(git_array_last(stack)->bld, git_path_basename(update->path));
+			{
+				char *basename = git_path_basename(update->path);
+				error = git_treebuilder_remove(git_array_last(stack)->bld, basename);
+				git__free(basename);
 				break;
+			}
 			default:
 				giterr_set(GITERR_TREE, "unkown action for update");
 				error = -1;
@@ -1275,6 +1282,7 @@ int git_tree_create_updated(git_oid *out, git_repository *repo, git_tree *baseli
 		}
 	}
 
+	git_buf_free(&component);
 	git_array_clear(stack);
 	git_vector_free(&entries);
 	return error;

tests/object/tree/update.c

@@ -127,7 +127,6 @@ void test_object_tree_update__add_blobs(void)
 	};
 
 	cl_git_pass(git_oid_fromstr(&base_id, "c4dc1555e4d4fa0e0c9c3fc46734c7c35b3ce90b"));
-	cl_git_pass(git_tree_lookup(&base_tree, g_repo, &base_id));
 
 	entry.mode = GIT_FILEMODE_BLOB;
 	cl_git_pass(git_oid_fromstr(&entry.id, "fa49b077972391ad58037050f2a75f74e3671e92"));
@@ -161,6 +160,8 @@ void test_object_tree_update__add_blobs(void)
 
 		cl_assert_equal_oid(&tree_index_id, &tree_updater_id);
 	}
+
+	git_tree_free(base_tree);
 }
 
 void test_object_tree_update__add_conflict(void)