Merge commit '8f7048984a7a96799914f6a37058706cb7ba119d'

Author: Mirroring

src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Media/Imaging/BitmapDecoder.cs

@@ -1190,7 +1190,7 @@ out decoder
             }
             catch
             {
-                bitmapStream.Close();
+                bitmapStream?.Close();
                 #pragma warning disable 6500
 
                 decoderHandle = null;