Merge branch 'ab/plug-leak-in-revisions'

Plug the memory leaks from the trickiest API of all, the revision
walker.

* ab/plug-leak-in-revisions: (27 commits)
  revisions API: add a TODO for diff_free(&revs->diffopt)
  revisions API: have release_revisions() release "topo_walk_info"
  revisions API: have release_revisions() release "date_mode"
  revisions API: call diff_free(&revs->pruning) in revisions_release()
  revisions API: release "reflog_info" in release revisions()
  revisions API: clear "boundary_commits" in release_revisions()
  revisions API: have release_revisions() release "prune_data"
  revisions API: have release_revisions() release "grep_filter"
  revisions API: have release_revisions() release "filter"
  revisions API: have release_revisions() release "cmdline"
  revisions API: have release_revisions() release "mailmap"
  revisions API: have release_revisions() release "commits"
  revisions API users: use release_revisions() for "prune_data" users
  revisions API users: use release_revisions() with UNLEAK()
  revisions API users: use release_revisions() in builtin/log.c
  revisions API users: use release_revisions() in http-push.c
  revisions API users: add "goto cleanup" for release_revisions()
  stash: always have the owner of "stash_info" free it
  revisions API users: use release_revisions() needing REV_INFO_INIT
  revision.[ch]: document and move code declared around "init"
  ...

2 files changed, 17 insertions, 7 deletions

diff --git a/t/helper/test-fast-rebase.c b/t/helper/test-fast-rebase.c
index fc2d460904..4e5553e202 100644
--- a/t/helper/test-fast-rebase.c
+++ b/t/helper/test-fast-rebase.c
@@ -99,6 +99,7 @@ int cmd__fast_rebase(int argc, const char **argv)
 	struct merge_result result;
 	struct strbuf reflog_msg = STRBUF_INIT;
 	struct strbuf branch_name = STRBUF_INIT;
+	int ret = 0;
 
 	/*
 	 * test-tool stuff doesn't set up the git directory by default; need to
@@ -137,13 +138,17 @@ int cmd__fast_rebase(int argc, const char **argv)
 	revs.topo_order = 1;
 	strvec_pushl(&rev_walk_args, "", argv[4], "--not", argv[3], NULL);
 
-	if (setup_revisions(rev_walk_args.nr, rev_walk_args.v, &revs, NULL) > 1)
-		return error(_("unhandled options"));
+	if (setup_revisions(rev_walk_args.nr, rev_walk_args.v, &revs, NULL) > 1) {
+		ret = error(_("unhandled options"));
+		goto cleanup;
+	}
 
 	strvec_clear(&rev_walk_args);
 
-	if (prepare_revision_walk(&revs) < 0)
-		return error(_("error preparing revisions"));
+	if (prepare_revision_walk(&revs) < 0) {
+		ret = error(_("error preparing revisions"));
+		goto cleanup;
+	}
 
 	init_merge_options(&merge_opt, the_repository);
 	memset(&result, 0, sizeof(result));
@@ -201,8 +206,6 @@ int cmd__fast_rebase(int argc, const char **argv)
 		}
 		if (create_symref("HEAD", branch_name.buf, reflog_msg.buf) < 0)
 			die(_("unable to update HEAD"));
-		strbuf_release(&reflog_msg);
-		strbuf_release(&branch_name);
 
 		prime_cache_tree(the_repository, the_repository->index,
 				 result.tree);
@@ -221,5 +224,11 @@ int cmd__fast_rebase(int argc, const char **argv)
 	if (write_locked_index(&the_index, &lock,
 			       COMMIT_LOCK | SKIP_IF_UNCHANGED))
 		die(_("unable to write %s"), get_index_file());
-	return (result.clean == 0);
+
+	ret = (result.clean == 0);
+cleanup:
+	strbuf_release(&reflog_msg);
+	strbuf_release(&branch_name);
+	release_revisions(&revs);
+	return ret;
 }
diff --git a/t/helper/test-revision-walking.c b/t/helper/test-revision-walking.c
index 625b2dbf82..4a45d5bac2 100644
--- a/t/helper/test-revision-walking.c
+++ b/t/helper/test-revision-walking.c
@@ -43,6 +43,7 @@ static int run_revision_walk(void)
 	}
 
 	reset_revision_walk();
+	release_revisions(&rev);
 	return got_revision;
 }