SIZE_OP_RETURN   1225 ext/mbstring/oniguruma/regcomp.c 	  + SIZE_OP_CALL + SIZE_OP_JUMP + SIZE_OP_RETURN;
SIZE_OP_RETURN   1289 ext/mbstring/oniguruma/regcomp.c       len += (SIZE_OP_MEMORY_START_PUSH + SIZE_OP_RETURN);