From 74579ecccb9685e40aefb3766629fe386efacfe7 Mon Sep 17 00:00:00 2001
From: Eric Niebler <eniebler@nvidia.com>
Date: Sat, 23 Sep 2023 14:50:05 -0700
Subject: [PATCH] add back constraint mistakenly dropped in [db739f6]

---
 include/stdexec/execution.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/stdexec/execution.hpp b/include/stdexec/execution.hpp
index 8b5e55034..3042fb5cc 100644
--- a/include/stdexec/execution.hpp
+++ b/include/stdexec/execution.hpp
@@ -4751,7 +4751,7 @@ namespace stdexec {
               __completion_signatures_of_t<_Sender, _Env>>>;
 
         template <__decays_to<__t> _Self, receiver _Receiver>
-        //requires sender_to<__copy_cvref_t<_Self, _Sender>, __receiver_t<_Self, _Receiver>>
+          requires sender_to<__copy_cvref_t<_Self, _Sender>, __receiver_t<_Self, _Receiver>>
         friend auto tag_invoke(connect_t, _Self&& __self, _Receiver __rcvr)
           -> __operation_t<_Self, _Receiver> {
           return __operation_t<_Self, _Receiver>{