revisions API users: use release_revisions() needing REV_INFO_INIT

Use release_revisions() to various users of "struct rev_list" which
need to have their "struct rev_info" zero-initialized before we can
start using it.

For the bundle.c code see the early exit case added in
3bbbe467f29 (bundle verify: error out if called without an object
database, 2019-05-27).

For the relevant bisect.c code see 45b6370812c (bisect: libify
`check_good_are_ancestors_of_bad` and its dependents, 2020-02-17).

For the submodule.c code see the "goto" on "(!left || !right || !sub)"
added in 8e6df65015f (submodule: refactor show_submodule_summary with
helper function, 2016-08-31).

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 12 insertions, 6 deletions

diff --git a/bisect.c b/bisect.c
index cc6b8b6230..b63669cc9d 100644
--- a/bisect.c
+++ b/bisect.c
@@ -1010,7 +1010,7 @@ void read_bisect_terms(const char **read_bad, const char **read_good)
  */
 enum bisect_error bisect_next_all(struct repository *r, const char *prefix)
 {
-	struct rev_info revs;
+	struct rev_info revs = REV_INFO_INIT;
 	struct commit_list *tried;
 	int reaches = 0, all = 0, nr, steps;
 	enum bisect_error res = BISECT_OK;
@@ -1035,7 +1035,7 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix)
 
 	res = check_good_are_ancestors_of_bad(r, prefix, no_checkout);
 	if (res)
-		return res;
+		goto cleanup;
 
 	bisect_rev_setup(r, &revs, prefix, "%s", "^%s", 1);
 
@@ -1060,14 +1060,16 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix)
 		       term_good,
 		       term_bad);
 
-		return BISECT_FAILED;
+		res = BISECT_FAILED;
+		goto cleanup;
 	}
 
 	if (!all) {
 		fprintf(stderr, _("No testable commit found.\n"
 			"Maybe you started with bad path arguments?\n"));
 
-		return BISECT_NO_TESTABLE_COMMIT;
+		res = BISECT_NO_TESTABLE_COMMIT;
+		goto cleanup;
 	}
 
 	bisect_rev = &revs.commits->item->object.oid;
@@ -1087,7 +1089,8 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix)
 		 * for negative return values for early returns up
 		 * until the cmd_bisect__helper() caller.
 		 */
-		return BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND;
+		res = BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND;
+		goto cleanup;
 	}
 
 	nr = all - reaches - 1;
@@ -1106,7 +1109,10 @@ enum bisect_error bisect_next_all(struct repository *r, const char *prefix)
 	/* Clean up objects used, as they will be reused. */
 	repo_clear_commit_marks(r, ALL_REV_FLAGS);
 
-	return bisect_checkout(bisect_rev, no_checkout);
+	res = bisect_checkout(bisect_rev, no_checkout);
+cleanup:
+	release_revisions(&revs);
+	return res;
 }
 
 static inline int log2i(int n)