`break` should not cross fiber-context boundary; fix
MODIFY
src/vm.c
src/vm.c
@@ -1991,6 +1991,9 @@ RETRY_TRY_BLOCK:
if (!proc->env || !MRB_ENV_STACK_SHARED_P(proc->env)) {
goto L_BREAK_ERROR;
}
+ if (proc->env->cxt.c != mrb->c) {
+ goto L_BREAK_ERROR;
+ }
while (mrb->c->eidx > mrb->c->ci->epos) {
ecall(mrb, --mrb->c->eidx);
}

`break` should not cross fiber-context boundary; fix #3724