[release/7.0] Fix nested non-byref like VC with no pointer fields #80873
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* Fix nested non-byref like VC with no pointer fields
AaronRobinsonMSFT
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trylek
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Jan 19, 2023
jeffschwMSFT
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Backport of #80642 that fixes #80624
Customer Impact
Customer reported issue with nested ref structs. A
TypeLoadExceptioncan occur when a non-ByRefLike struct contains other structs marked with explicit layout. This was a regression introduced when adding ref field support in #65246.Testing
New tests have been added for this failure case and others in the same area.
Risk
Low. The fix here is a permitting behavior that existed in .NET 6 but folding in the ref field logic. The changes to make that support are simple enough and should avoid the failing behavior that was acknowledged by an assert in debug builds. This implements the needed path.