OP_PUSH_POS      1507 regcomp.c          r = add_opcode(reg, OP_PUSH_POS);
OP_PUSH_POS      6231 regcomp.c        { OP_PUSH_POS,             "push-pos",             ARG_NON },
OP_PUSH_POS      2971 regexec.c          CASE(OP_PUSH_POS)  MOP_IN(OP_PUSH_POS);