Mixedrealitytoolkit-unity: WorldAnchorManager causes WinRTScriptingObjectWrapper crash in Debug Mode

[ghost]

Using the HoloLens, the call to GetAsync() in WorldAnchorManager::Awake() never returns. A breakpoint on line 65 is hit, then the app crashes. Runs fine in Release mode.

WinRTScriptingObjectWrapper::InternalAddRef Reference Count cannot be zero (Filename: C:\buildslave\unity\build\Runtime/ScriptingBackend/DotNet/ScriptingApi_DotNet.cpp Line: 661) The program '[4144] test8.exe' has exited with code -2147483645 (0x80000003).

We can replicate this on PCs with VS2017 Enterprise and Community, with Unity 5.6, and on two separate HoloLens devices.

[StephenHodgson]

We can replicate this on PCs

GetAsync is/will never called in the editor nor on PC, but the crashing on HL is concerning.
I'll need a bit more information about your setup.

[gitAllender]

Just see this topic:
https://forums.hololens.com/discussion/7203/vs2017-u5-6-crash-winrtscriptingobjectwrapper-internaladdref-reference-count-cannot-be-zero

Have the same problem with VS2017, Unity 5.60f3 and Hololens

[StephenHodgson]

Did you try the 5.6.0p1 patch release? They seemed to have addressed a lot of windows store platform build fixes.

[gitAllender]

Updated. The same result.

[elbruno]

My 2 cents: tested with Unity3D 5.6.0p2, and I got the same error.

[StephenHodgson]

This only happens in a Debug build correct?
Have you tried Release or Master builds?

[StephenHodgson]

I believe this was a Unity bug and has been resolved in later editor releases. Please reopen if issue persists in Unity Editor 2017+

[ghost]

I can confirm this. I’m working with v2017.1.0f3, and all is well. Thank you.

From: Stephen Hodgson [mailto:[email protected]]
Sent: 01 August 2017 02:02
To: Microsoft/HoloToolkit-Unity [e-mail]
Cc: dixoncb [e-mail]; Author [e-mail]
Subject: Re: [Microsoft/HoloToolkit-Unity] WorldAnchorManager causes WinRTScriptingObjectWrapper crash in Debug Mode (#623)

I believe this was a Unity bug and has been resolved in later editor releases. Please reopen if issue persists in Unity Editor 2017+

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