SL-16450 Don not crash viewer in case of invalid data type

indra/newview/llstartup.cpp

@@ -1188,6 +1188,10 @@ bool idle_startup()
 
 						}
 					}
+                    else if (reason_response == "BadType")
+                    {
+                        LLNotificationsUtil::add("LoginFailedToParse", LLSD(), LLSD(), login_alert_done);
+                    }
 					else if (!message.empty())
 					{
 						// This wasn't a certificate error, so throw up the normal

indra/newview/skins/default/xui/en/notifications.xml

@@ -212,6 +212,19 @@ Make sure your Internet connection is working properly.
      yestext="OK"/>
   </notification>
 
+  <notification
+   icon="alertmodal.tga"
+   name="LoginFailedToParse"
+   type="alertmodal">
+    <tag>fail</tag>
+Viewer received malformed response from server. Please, make sure your Internet connection is working properly and try again later.
+
+If you feel this is in error, please contact Support.
+    <usetemplate
+       name="okbutton"
+       yestext="OK"/>
+  </notification>
+
   <notification
    icon="alertmodal.tga"
    name="MessageTemplateNotFound"

indra/viewer_components/login/lllogin.cpp

@@ -284,6 +284,7 @@ void LLLogin::Impl::loginCoro(std::string uri, LLSD login_params)
 
         // If we don't recognize status at all, trouble
         if (! (status == "CURLError"
+               || status == "BadType"
                || status == "XMLRPCError"
                || status == "OtherError"))
         {
@@ -293,6 +294,15 @@ void LLLogin::Impl::loginCoro(std::string uri, LLSD login_params)
             return;
         }
 
+        if (status == "BadType")
+        {
+            // Invalid xmlrpc type
+            // Dump this response into logs
+            LL_WARNS("LLLogin") << "Failed to parse response"
+                << " from " << xmlrpcPump.getName()
+                << " pump: " << mAuthResponse << LL_ENDL;
+        }
+
         // Here status IS one of the errors tested above.
         // Tell caller this didn't work out so well.