arg_stk_base      428 ext/mbstring/oniguruma/regexec.c stack_double(OnigStackType** arg_stk_base, OnigStackType** arg_stk_end,
arg_stk_base      434 ext/mbstring/oniguruma/regexec.c   stk_base = *arg_stk_base;
arg_stk_base      463 ext/mbstring/oniguruma/regexec.c   *arg_stk_base = x;