shallow: fix memory leak when registering shallow roots

When registering shallow roots, we unset the list of parents of the
to-be-registered commit if it's already been parsed. This causes us to
leak memory though because we never free this list. Fix this.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/shallow.c b/shallow.c
index 5413719fd4..ac728cdd77 100644
--- a/shallow.c
+++ b/shallow.c
@@ -38,8 +38,10 @@ int register_shallow(struct repository *r, const struct object_id *oid)
 
 	oidcpy(&graft->oid, oid);
 	graft->nr_parent = -1;
-	if (commit && commit->object.parsed)
+	if (commit && commit->object.parsed) {
+		free_commit_list(commit->parents);
 		commit->parents = NULL;
+	}
 	return register_commit_graft(r, graft, 0);
 }