arg_stk           429 ext/mbstring/oniguruma/regexec.c 	     OnigStackType** arg_stk, OnigStackType* stk_alloc, OnigMatchArg* msa)
arg_stk           436 ext/mbstring/oniguruma/regexec.c   stk      = *arg_stk;
arg_stk           462 ext/mbstring/oniguruma/regexec.c   *arg_stk      = x + (stk - stk_base);