[Bug 49116] Windows 10 1903 SDK (10.0.18362.0) installer crashes (method invocation on wrong CCW interface?)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49116

--- Comment #2 from Zebediah Figura <z.figura12 at gmail.com> ---
A bit of research later, I understand this better.

BootstrapperApplicationFactory is irrelevant, because what CreateInstance()
returns is System.ObjectHandle. The 0x38 offset is Unwrap(). The missing
methods are those of System.Object itself.

The CCW comes from System.Runtime.InteropServices.Marshal:GetCCW, which is an
icall to mono/metadata/cominterop.c. That code seems to want to do the right
thing, but it doesn't for some reason. It'll take some more debugging to figure
out why.

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