The number of argument should be retrieved by `mrb_get_argc`; fix
You should not access `mrb->c->ci->argc` directly.
MODIFY
src/array.c
src/array.c
@@ -941,7 +941,7 @@ mrb_ary_first(mrb_state *mrb, mrb_value self)
struct RArray *a = mrb_ary_ptr(self);
mrb_int size, alen = ARY_LEN(a);
- if (mrb->c->ci->argc == 0) {
+ if (mrb_get_argc(mrb) == 0) {
return (alen > 0)? ARY_PTR(a)[0]: mrb_nil_value();
}
mrb_get_args(mrb, "|i", &size);

The number of argument should be retrieved by `mrb_get_argc`; fix #3848

You should not access `mrb->c->ci->argc` directly.