fiber.c: add fiber_check_cfunc in fiber_resume().
@@ -267,6 +267,7 @@ fiber_resume(mrb_state *mrb, mrb_value self)
mrb_int len;
mrb_bool vmexec = FALSE;
+ fiber_check_cfunc(mrb, mrb->c);
mrb_get_args(mrb, "*!", &a, &len);
if (mrb->c->ci->cci > 0) {
vmexec = TRUE;
