t / t4018 / cpp-struct-definitionon commit introduce "extensions" form of core.repositoryformatversion (00a09d5)
   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};