From a2c0d38d8ef5767657d4315b568b70bd5be06cfd Mon Sep 17 00:00:00 2001
From: Mo Xiaoming <2188767+mo-xiaoming@users.noreply.github.com>
Date: Wed, 6 Jul 2022 23:01:05 +0800
Subject: [PATCH] hobbes::variant tag become invalid causes buffer overrun
 during destruction calls

---
 include/hobbes/net.H | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/hobbes/net.H b/include/hobbes/net.H
index 6b7a72a9..de791854 100644
--- a/include/hobbes/net.H
+++ b/include/hobbes/net.H
@@ -807,10 +807,10 @@ template <typename ... Fs>
     }
     static bool accum(int s, async_read_state* o, tuple<Fs...>* x) {
       if (o->template apply<bool, tupAsyncAcc, tuple<Fs...>, int, tuple<Fs...>*>(s, x)) {
-        ++o->unsafeTag();
-        if (o->unsafeTag() == sizeof...(Fs)) {
+        if (o->unsafeTag() == sizeof...(Fs)-1) {
           return true;
         } else {
+          ++o->unsafeTag();
           variantApp<void, tupAsyncInit, void, tuple<Fs...>, void*>::apply(o->unsafeTag(), o->unsafePayload(), o->unsafePayload());
           return false;
         }
@@ -1013,6 +1013,7 @@ template <typename R, typename ... Args>
         this->ks.front()(this->r);
         this->ks.pop();
         this->r = R();
+        this->pr = async_read_state();
         io<R>::prepare(&this->pr);
         return true;
       } else {