t / t4018 / cpp-struct-definitionon commit delete_refs(): bail early if the packed-refs file cannot be rewritten (7fa7dc8)
   1struct RIGHT {
   2        unsigned
   3        /* this bit field looks like a label and should not be picked up */
   4                decoy_bitfield: 2,
   5                more : 1;
   6        int filler;
   7
   8        int ChangeMe;
   9};