attempt to fix async cx flow

StackExchange.Redis/ChannelMessageQueue.cs

@@ -151,8 +151,11 @@ private void AssertOnMessage(Delegate handler)
         public void OnMessage(Action<ChannelMessage> handler)
         {
             AssertOnMessage(handler);
-            ThreadPool.QueueUserWorkItem(
+            using (ExecutionContext.SuppressFlow())
+            {
+                ThreadPool.QueueUserWorkItem(
                 state => ((ChannelMessageQueue)state).OnMessageSyncImpl(), this);
+            }
         }
 
         private async void OnMessageSyncImpl()
@@ -181,8 +184,11 @@ private async void OnMessageSyncImpl()
         public void OnMessage(Func<ChannelMessage, Task> handler)
         {
             AssertOnMessage(handler);
-            ThreadPool.QueueUserWorkItem(
+            using (ExecutionContext.SuppressFlow())
+            {
+                ThreadPool.QueueUserWorkItem(
                 state => ((ChannelMessageQueue)state).OnMessageAsyncImpl(), this);
+            }
         }
 
         private async void OnMessageAsyncImpl()

StackExchange.Redis/PhysicalBridge.cs

@@ -668,7 +668,11 @@ private PhysicalConnection GetConnection(TextWriter log)
                             // separate creation and connection for case when connection completes synchronously
                             // in that case PhysicalConnection will call back to PhysicalBridge, and most of  PhysicalBridge methods assumes that physical is not null;
                             physical = new PhysicalConnection(this);
-                            physical.BeginConnectAsync(log);
+
+                            using (ExecutionContext.SuppressFlow())
+                            {
+                                physical.BeginConnectAsync(log);
+                            }
                         }
                     }
                     return null;

StackExchange.Redis/PhysicalConnection.cs

@@ -77,7 +77,7 @@ internal async void BeginConnectAsync(TextWriter log)
             Thread.VolatileWrite(ref firstUnansweredWriteTickCount, 0);
             var bridge = BridgeCouldBeNull;
             var endpoint = bridge?.ServerEndPoint?.EndPoint;
-            if(endpoint == null)
+            if (endpoint == null)
             {
                 log?.WriteLine("No endpoint");
             }
@@ -598,7 +598,7 @@ internal void OnBridgeHeartbeat()
         internal void OnInternalError(Exception exception, [CallerMemberName] string origin = null)
         {
             var bridge = BridgeCouldBeNull;
-            if(bridge != null)
+            if (bridge != null)
             {
                 bridge.Multiplexer.OnInternalError(exception, bridge.ServerEndPoint.EndPoint, connectionType, origin);
             }
@@ -983,7 +983,7 @@ internal static void WriteUnifiedPrefixedString(PipeWriter writer, byte[] prefix
         internal static Encoder GetPerThreadEncoder()
         {
             var encoder = s_PerThreadEncoder;
-            if(encoder == null)
+            if (encoder == null)
             {
                 s_PerThreadEncoder = encoder = Encoding.UTF8.GetEncoder();
             }
@@ -1171,7 +1171,7 @@ internal async ValueTask<bool> ConnectedAsync(Socket socket, TextWriter log, Soc
                         {
                             ssl.AuthenticateAsClient(host, config.SslProtocols);
                         }
-                        catch(Exception ex)
+                        catch (Exception ex)
                         {
                             Debug.WriteLine(ex.Message);
                             bridge.Multiplexer?.SetAuthSuspect();
@@ -1494,7 +1494,13 @@ private static RawResult ReadLineTerminatedString(ResultType type, ref BufferRea
             return new RawResult(type, payload, false);
         }
 
-        internal void StartReading() => ReadFromPipe();
+        internal void StartReading()
+        {
+            using (ExecutionContext.SuppressFlow())
+            {
+                ReadFromPipe();
+            }
+        }
 
         internal static RawResult TryParseResult(in ReadOnlySequence<byte> buffer, ref BufferReader reader,
             bool includeDetilInExceptions, ServerEndPoint server, bool allowInlineProtocol = false)