OP_POP_STOP_BT   1359 ext/mbstring/oniguruma/regcomp.c       r = add_opcode(reg, OP_POP_STOP_BT);
OP_POP_STOP_BT   5751 ext/mbstring/oniguruma/regcomp.c   { OP_POP_STOP_BT,          "pop-stop-bt",          ARG_NON },
OP_POP_STOP_BT   2633 ext/mbstring/oniguruma/regexec.c     case OP_POP_STOP_BT:  MOP_IN(OP_POP_STOP_BT);