1 files changed, 2 insertions, 0 deletions
diff --git a/cache-tree.c b/cache-tree.c
index a80326289d..9b73c8669a 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -282,6 +282,8 @@ static int update_one(struct cache_tree *it,
 				    baselen + sublen + 1,
 				    missing_ok,
 				    dryrun);
+		if (subcnt < 0)
+			return subcnt;
 		i += subcnt - 1;
 		sub->used = 1;
 	}