SIZE_OP_FAIL_LOOK_BEHIND_NOT 1373 mbstring/oniguruma/regcomp.c     len = SIZE_OP_PUSH_LOOK_BEHIND_NOT + tlen + SIZE_OP_FAIL_LOOK_BEHIND_NOT;
SIZE_OP_FAIL_LOOK_BEHIND_NOT 1444 mbstring/oniguruma/regcomp.c 			   len + SIZE_OP_FAIL_LOOK_BEHIND_NOT);