Avoid accessing a slow working copy during diffcore operations.

diff --git a/refs.c b/refs.c
index 2ac8273ea475ebf169f86840587d48bf1e1b8a91..a02957c399ded94bb9a49c9dc3d8ab5d9411bbec 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -534,7 +534,7 @@ int check_ref_format(const char *ref)
                level++;
                if (!ch) {
                        if (level < 2)
-                               return -1; /* at least of form "heads/blah" */
+                               return -2; /* at least of form "heads/blah" */
                        return 0;
                }
        }