gistfile1.txt

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentNullException: Argument cannot be null.
Parameter name: source
  at System.Linq.Check.SourceAndPredicate (System.Object source, System.Object predicate) [0x00022] in /private/tmp/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.10/_build/mono-2.10.10.git/mcs/class/System.Core/System.Linq/Check.cs:82 
  at System.Linq.Enumerable.Any[Update] (IEnumerable`1 source, System.Func`2 predicate) [0x00000] in /private/tmp/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.10/_build/mono-2.10.10.git/mcs/class/System.Core/System.Linq/Enumerable.cs:141 
  at Xamarin.Ide.Updater.DownloadService+<SetUpdates>c__AnonStorey5.<>m__4 (Xamarin.Ide.Updater.Update d) [0x00014] in /Users/builder/data/lanes/monodevelop-lion-monodevelop-3.0-series/d6e46ae0/source/md-addins/Xamarin.Ide/Xamarin.Ide/Xamarin.Ide.Updater/DownloadService.cs:195 
  at System.Linq.Enumerable+<CreateWhereIterator>c__Iterator35`1[Xamarin.Ide.Updater.Update].MoveNext () [0x00059] in /private/tmp/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.10/_build/mono-2.10.10.git/mcs/class/System.Core/System.Linq/Enumerable.cs:3010 
  at Xamarin.Ide.Updater.DownloadService.SetUpdates (IEnumerable`1 targets) [0x000a9] in /Users/builder/data/lanes/monodevelop-lion-monodevelop-3.0-series/d6e46ae0/source/md-addins/Xamarin.Ide/Xamarin.Ide/Xamarin.Ide.Updater/DownloadService.cs:194 
  at Xamarin.Ide.Updater.UpdatesDialog.<CreateSwitchChannelButton>m__2E (System.Object , System.EventArgs ) [0x00019] in /Users/builder/data/lanes/monodevelop-lion-monodevelop-3.0-series/d6e46ae0/source/md-addins/Xamarin.Ide/Xamarin.Ide/Xamarin.Ide.Updater/UpdatesDialog.cs:380 
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x000d5] in /private/tmp/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.10/_build/mono-2.10.10.git/mcs/class/corlib/System.Reflection/MonoMethod.cs:226 
  --- End of inner exception stack trace ---
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x000eb] in /private/tmp/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.10/_build/mono-2.10.10.git/mcs/class/corlib/System.Reflection/MonoMethod.cs:234 
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in /private/tmp/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.10/_build/mono-2.10.10.git/mcs/class/corlib/System.Reflection/MethodBase.cs:96 
  at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x000bf] in /private/tmp/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.10/_build/mono-2.10.10.git/mcs/class/corlib/System/Delegate.cs:413 
  at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00018] in /private/tmp/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.10/_build/mono-2.10.10.git/mcs/class/corlib/System/MulticastDelegate.cs:70 
  at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] in /private/tmp/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.10/_build/mono-2.10.10.git/mcs/class/corlib/System/Delegate.cs:387 
  at GLib.Signal.ClosureInvokedCB (System.Object o, GLib.ClosureInvokedArgs args) [0x00000] in <filename unknown>:0 
  at GLib.SignalClosure.Invoke (GLib.ClosureInvokedArgs args) [0x00000] in <filename unknown>:0 
  at GLib.SignalClosure.MarshalCallback (IntPtr raw_closure, IntPtr return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data) [0x00000] in <filename unknown>:0