Runtime fails to build with latest compiler: CS0208

[lbussell]

We are encountering build errors when building with the latest internal compiler in source-build. It gives error CS0208: Cannot take the address of, get the size of, or declare a pointer to a managed type. It also gives several CS8500 warnings.

Here is a link to the internal build failure: https://dev.azure.com/dnceng/internal/_build/results?buildId=2004504&view=logs&j=2d3d5aef-8fa7-5ecd-0b12-6aebb43b720c&t=9b89cfd5-8b4c-5686-5153-a3d2912d1018&l=25741 (internal MS link)

/tarball/src/runtime/artifacts/source-build/self/src/src/coreclr/nativeaot/System.Private.CoreLib/src/System/Reflection/DynamicInvokeInfo.cs(329,26): error CS0208: Cannot take the address of, get the size of, or declare a pointer to a managed type ('ByReference') [/tarball/src/runtime/artifacts/source-build/self/src/src/coreclr/nativeaot/System.Private.CoreLib/src/System.Private.CoreLib.csproj]

Here is a link to the CS0208 Documentation.

Is there a simple fix for this that we can implement as a patch ASAP?

cc @AaronRobinsonMSFT @MichaelSimons @crummel

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[jkotas]

We need the change that @jcouv prepared here: dotnet/roslyn#64064 (comment)

Tagging subscribers to this area: @dotnet/area-meta
See info in area-owners.md if you want to be subscribed.

Issue Details

---

We are encountering build errors when building with the latest internal compiler in source-build. It gives error CS0208: Cannot take the address of, get the size of, or declare a pointer to a managed type. It also gives several CS8500 warnings.

Here is a link to the internal build failure: https://dev.azure.com/dnceng/internal/_build/results?buildId=2004504&view=logs&j=2d3d5aef-8fa7-5ecd-0b12-6aebb43b720c&t=9b89cfd5-8b4c-5686-5153-a3d2912d1018&l=25741 (internal MS link)

/tarball/src/runtime/artifacts/source-build/self/src/src/coreclr/nativeaot/System.Private.CoreLib/src/System/Reflection/DynamicInvokeInfo.cs(329,26): error CS0208: Cannot take the address of, get the size of, or declare a pointer to a managed type ('ByReference') [/tarball/src/runtime/artifacts/source-build/self/src/src/coreclr/nativeaot/System.Private.CoreLib/src/System.Private.CoreLib.csproj]

Here is a link to the CS0208 Documentation.

Is there a simple fix for this that we can implement as a patch ASAP?

cc @AaronRobinsonMSFT @MichaelSimons @crummel

Author:	lbussell
Assignees:	-
Labels:	area-Meta, source-build
Milestone:	Future

[jcouv]

Here's the change @cston had prepared for the runtime repo (picking up new Roslyn compiler and adjusting runtime code accordingly). I'm not sure how Source Build fits in relation to that change.