Merge branch 'js/maint-fast-export-mark-error'

* js/maint-fast-export-mark-error:
  fast-export: report SHA-1 instead of gibberish when marks exist already

builtin/fast-export.c

@@ -610,7 +610,7 @@ static void import_marks(char *input_file)
 			die ("Could not read blob %s", sha1_to_hex(sha1));
 
 		if (object->flags & SHOWN)
-			error("Object %s already has a mark", sha1);
+			error("Object %s already has a mark", sha1_to_hex(sha1));
 
 		mark_object(object, mark);
 		if (last_idnum < mark)