blame: unbreak "diff -U 0".

diff --git a/refs.c b/refs.c
index 826ae7ade7b7ebab01f4446ccb135c6f90c5a3a2..982ebf8ae53f0d64d419e820eb541624c0dec449 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -151,10 +151,15 @@ static int do_for_each_ref(const char *base, int (*fn)(const char *path, const u
                                        break;
                                continue;
                        }
-                       if (read_ref(git_path("%s", path), sha1) < 0)
+                       if (read_ref(git_path("%s", path), sha1) < 0) {
+                               fprintf(stderr, "%s points nowhere!", path);
                                continue;
-                       if (!has_sha1_file(sha1))
+                       }
+                       if (!has_sha1_file(sha1)) {
+                               fprintf(stderr, "%s does not point to a valid "
+                                               "commit object!", path);
                                continue;
+                       }
                        retval = fn(path, sha1);
                        if (retval)
                                break;