Merge branch 'fr/sequencer-fail-with-not-one-upon-no-ff'

* fr/sequencer-fail-with-not-one-upon-no-ff:
  sequencer: signal failed ff as an aborted, not a conflicted merge

Author: gitster

sequencer.c

@@ -278,7 +278,7 @@ static int fast_forward_to(const unsigned char *to, const unsigned char *from,
 
 	read_cache();
 	if (checkout_fast_forward(from, to, 1))
-		exit(1); /* the callee should have complained already */
+		exit(128); /* the callee should have complained already */
 	ref_lock = lock_any_ref_for_update("HEAD", unborn ? null_sha1 : from,
 					   0, NULL);
 	if (!ref_lock)