Exception thrown at 0x77312482 (KernelBase.dll)

I get a lot of exceptions. Unity Version: 2017.1.0b6. Where do they come from?

Exception:
Exception thrown at 0x77312482 (KernelBase.dll) in Standalone.exe: 0x40080201: WinRT originate error (parameters: 0x80070057, 0x0000003C, 0x04DFDC40).

Stacktrace:
KernelBase.dll!RaiseException@16()
combase.dll!SendReport(HRESULT error, unsigned int cchMax, const wchar_t * message, unsigned short pSid, void * pExceptionObject, IUnknown *)
combase.dll!RoOriginateError(HRESULT error, HSTRING
_ * message)
Windows.Mirage.dll!70e67f35()

At 0x04DFDC40:
T.h.e. .p.r.o.v.i.d.e.d. .v.a.l.u.e. .w.a.s. .o.u.t.s.i.d.e. .o.f. .t.h.e. .r.a.n.g.e. .o.f. .v.a.l.i.d. .v.a.l.u.e.s

That stacktrace is unfortunately too limited to diagnose what’s going on just from that, but the fact that it’s inside Windows.Mirage.dll makes me think it’s originating from a call we make internally in Unity code. Do you have any scripts in your project, or does this repro with a blank project? If it doesn’t repro with a blank project, would you mind filing a bug report (and prefixing the title with “[HoloLens]” so it gets to our team ASAP)?