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-rw-r--r--src/DotNetOpenAuth/OpenId/RelyingParty/OpenIdAjaxTextBox.cs3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth/OpenId/RelyingParty/OpenIdAjaxTextBox.cs b/src/DotNetOpenAuth/OpenId/RelyingParty/OpenIdAjaxTextBox.cs
index 561706a..bb3e49b 100644
--- a/src/DotNetOpenAuth/OpenId/RelyingParty/OpenIdAjaxTextBox.cs
+++ b/src/DotNetOpenAuth/OpenId/RelyingParty/OpenIdAjaxTextBox.cs
@@ -1298,6 +1298,9 @@ if (!openidbox.dnoi_internal.onSubmit()) {{ return false; }}
this.OnUnconfirmedPositiveAssertion();
foreach (var pair in this.clientScriptExtensions) {
IClientScriptExtensionResponse extension = (IClientScriptExtensionResponse)authResponse.GetExtension(pair.Key);
+ if (extension == null) {
+ continue;
+ }
var positiveResponse = (PositiveAuthenticationResponse)authResponse;
string js = extension.InitializeJavaScriptData(positiveResponse.Response);
if (string.IsNullOrEmpty(js)) {