Always decrement count on HTTP/2 stream completion (#3087)

#3079
dotnet · Nov 9, 2018 · 5db6394 · 5db6394
1 parent 4d2e686
commit 5db6394
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/Kestrel.Core/Internal/Http2/Http2Connection.cs b/src/Kestrel.Core/Internal/Http2/Http2Connection.cs
@@ -1045,11 +1045,11 @@ void IHttp2StreamLifetimeHandler.OnStreamCompleted(int streamId)
         {
             lock (_stateLock)
             {
+                _activeStreamCount--;
+
                 // Get, Add, Remove so the steam is always registered in at least one collection at a time.
                 if (_streams.TryGetValue(streamId, out var stream))
                 {
-                    _activeStreamCount--;
-
                     if (stream.IsDraining)
                     {
                         stream.DrainExpiration =