/home/david/coding-3/gcc-git-rich-errors/src/gcc/testsuite/g++.dg/diagnostic/bitfld1.C:12:15: error: invalid operands of types ‘char*’ and ‘unsigned char:1’ to binary ‘operator|’
 void *a = s.p | s.f; // { dg-error "unsigned char:1" }
           ~~~ ^ ~~~