From 1f761f5434f00aeb50fc6cd53c34dbaee589acca Mon Sep 17 00:00:00 2001
From: Radek Zikmund <32671551+rzikm@users.noreply.github.com>
Date: Tue, 23 Aug 2022 03:56:23 -0700
Subject: [PATCH] Remove assert from Http3Connection.SendAsync (#74348)

* Remove assert in System.Net.Http.Http3Connection.SendAsync

* Minor change
---
 .../System/Net/Http/SocketsHttpHandler/Http3Connection.cs   | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/Http3Connection.cs b/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/Http3Connection.cs
index ee9732416a38d7..a431ee33cadbdb 100644
--- a/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/Http3Connection.cs
+++ b/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/Http3Connection.cs
@@ -240,7 +240,7 @@ public async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, lon
             catch (QuicException ex) when (ex.QuicError == QuicError.OperationAborted)
             {
                 // This will happen if we aborted _connection somewhere and we have pending OpenOutboundStreamAsync call.
-                Debug.Assert(_abortException is not null);
+                // note that _abortException may be null if we closed the connection in response to a GOAWAY frame
                 throw new HttpRequestException(SR.net_http_client_execution_error, _abortException, RequestRetryType.RetryOnConnectionFailure);
             }
             finally
@@ -567,6 +567,10 @@ private async Task ProcessServerStreamAsync(QuicStream stream)
                     }
                 }
             }
+            catch (QuicException ex) when (ex.QuicError == QuicError.OperationAborted)
+            {
+                // ignore the exception, we have already closed the connection
+            }
             catch (Exception ex)
             {
                 Abort(ex);