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-rw-r--r--builtin-fmt-merge-msg.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/builtin-fmt-merge-msg.c b/builtin-fmt-merge-msg.c
index 6163bd4975..ebb3f37cf1 100644
--- a/builtin-fmt-merge-msg.c
+++ b/builtin-fmt-merge-msg.c
@@ -187,7 +187,8 @@ static void shortlog(const char *name, unsigned char *sha1,
add_pending_object(rev, branch, name);
add_pending_object(rev, &head->object, "^HEAD");
head->object.flags |= UNINTERESTING;
- prepare_revision_walk(rev);
+ if (prepare_revision_walk(rev))
+ die("revision walk setup failed");
while ((commit = get_revision(rev)) != NULL) {
char *oneline, *bol, *eol;