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-rw-r--r--src/DotNetOpenAuth.OpenId.Provider/OpenId/Provider/Extensions/ExtensionsInteropHelper.cs3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/DotNetOpenAuth.OpenId.Provider/OpenId/Provider/Extensions/ExtensionsInteropHelper.cs b/src/DotNetOpenAuth.OpenId.Provider/OpenId/Provider/Extensions/ExtensionsInteropHelper.cs
index aedf119..45a59d2 100644
--- a/src/DotNetOpenAuth.OpenId.Provider/OpenId/Provider/Extensions/ExtensionsInteropHelper.cs
+++ b/src/DotNetOpenAuth.OpenId.Provider/OpenId/Provider/Extensions/ExtensionsInteropHelper.cs
@@ -86,7 +86,8 @@ namespace DotNetOpenAuth.OpenId.Provider.Extensions {
/// </remarks>
internal static async Task ConvertSregToMatchRequestAsync(this Provider.IHostProcessedRequest request, CancellationToken cancellationToken) {
var req = (Provider.HostProcessedRequest)request;
- var response = (await req.GetResponseAsync(cancellationToken)) as IProtocolMessageWithExtensions; // negative responses don't support extensions.
+ var protocolMessage = await req.GetResponseAsync(cancellationToken);
+ var response = protocolMessage as IProtocolMessageWithExtensions; // negative responses don't support extensions.
var sregRequest = request.GetExtension<ClaimsRequest>();
if (sregRequest != null && response != null) {
if (sregRequest.Synthesized) {