Unity crashes after releasing the Trigger Button (Motion Controller).

[Abstiens]

Overview

Unity crashes after releasing the Trigger Button (Motion Controller). The crash happens, after I release the Trigger on the backside of the controller (no message, Unity just disappears). Nothing happens, while I click and hold the trigger. If I pause Unity while I hold the trigger and then release it, it crashes immediately after I resume.

Expected Behavior

Unity shouldn't crash. You should be able to use all buttons of the controller without Unity crashing

Actual Behavior

Unity crashes

Steps to reproduce

• Cloned the MixedRealityToolkit (Master Branch checked out)
• opened it in Unity (Unity 2017.2.0p1-MRTP4)
• Opened and started the "GrabMechanics" Scene
• Teleporting with Thumbstick works, switching between Controllers with Grip Button works
• Pressing and holding the Trigger works, but ...
• ... releasing the Trigger closes Unity without any further Messages.

Last Editor Log Entries (Multiple Times):

InvalidOperationException: Nullable object must have a value.
  at System.Nullable`1[System.Int32].get_Value () [0x0000b] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Nullable.cs:108 
  at HoloToolkit.Unity.InputModule.FocusManager.GetPointer (IPointingSource pointingSource) [0x0001d] in C:\Users\Vuframe\Documents\MixedRealityToolkit-Unity\Assets\HoloToolkit\Input\Scripts\Focus\FocusManager.cs:784 
  at HoloToolkit.Unity.InputModule.FocusManager.GetFocusDetails (IPointingSource pointingSource) [0x00003] in C:\Users\Vuframe\Documents\MixedRealityToolkit-Unity\Assets\HoloToolkit\Input\Scripts\Focus\FocusManager.cs:383 
  at HoloToolkit.Unity.InputModule.Cursor.UpdateCursorTransform () [0x0000c] in C:\Users\Vuframe\Documents\MixedRealityToolkit-Unity\Assets\HoloToolkit\Input\Scripts\Cursor\Cursor.cs:289 
  at HoloToolkit.Unity.InputModule.Cursor.Update () [0x00008] in C:\Users\Vuframe\Documents\MixedRealityToolkit-Unity\Assets\HoloToolkit\Input\Scripts\Cursor\Cursor.cs:143 

(Filename: /Users/builduser/buildslave/mono/build/mcs/class/corlib/System/Nullable.cs Line: 108)

Assertion failed
UnityEngine.DebugLogHandler:Internal_Log(LogType, String, Object)
UnityEngine.DebugLogHandler:LogFormat(LogType, Object, String, Object[])
UnityEngine.Logger:Log(LogType, Object)
UnityEngine.Debug:Assert(Boolean)
HoloToolkit.Unity.InputModule.FocusManager:GetPointer(IPointingSource) (at Assets\HoloToolkit\Input\Scripts\Focus\FocusManager.cs:783)
HoloToolkit.Unity.InputModule.FocusManager:GetSpecificPointerEventData(IPointingSource) (at Assets\HoloToolkit\Input\Scripts\Focus\FocusManager.cs:429)
HoloToolkit.Unity.InputModule.InputManager:RaiseSourceUp(IInputSource, UInt32, InteractionSourcePressInfo, Object[]) (at Assets\HoloToolkit\Input\Scripts\Utilities\Managers\InputManager.cs:430)
HoloToolkit.Unity.InputModule.InteractionInputSource:InteractionManager_InteractionSourceReleased(InteractionSourceReleasedEventArgs) (at Assets\HoloToolkit\Input\Scripts\InputSources\InteractionInputSource.cs:919)
UnityEngine.XR.WSA.Input.InteractionManager:OnSourceEvent(EventType, InteractionSourceState, InteractionSourcePressType) (at C:\buildslave\unity\build\Runtime\VR\HoloLens\ScriptBindings\GestureSource.cs:481)

(Filename: Assets/HoloToolkit/Input/Scripts/Focus/FocusManager.cs Line: 783)

Unity Editor Version

Unity 2017.2.0p1-MRTP4

Mixed Reality Toolkit Release Version

Commit cb59a1c7 (also tried 4daacf92 (Pull Request #1350))

[StephenHodgson]

I'll look into this ASAP

[StephenHodgson]

@Abstiens try the latest push to #1350 and let me know if it fixed your issue.

[Abstiens]

@StephenHodgson Will check it tomorrow morning Thank you :)

[Abstiens]

@StephenHodgson Yes, it is fixed. Thank your very much :)

[StephenHodgson]

Please leave issues open until PRs are merged. Thanks