Resolving generic type creates Scope System.Private.CoreLib resulting in MissingMethodExceptions

The following generic type:

TypeReference genericType = module.ImportReference(typeof(System.Runtime.CompilerServices.TaskAwaiter<>))

(where module is a loaded Net5.0 assembly) The typeDef Scope is set to System.Private.CoreLib.dll which seems broken because when I try and call a method on this type I get MissingMethodException.

When I import a type that returns one of these generics the Scope on that return type is System.Runtime:

Interestingly the loaded assembly that contains this module has the following cached referenced assemblies, which do include System.Private.CoreLib even though ilspy does not show this dependency.

This is what I see in ilspy:

[lovettchris]

Yes, I skipped a bunch of other rewrite logic for variables, etc. So wow your code is much simpler, thanks and all my tests are still passing. I seemed to have gone off into the weeds with bugs I was running into thinking I had to also “make” all the types referenced by the generic (method parameter types and return types and so on). But somehow your magic avoids all that and things still seem to work… thanks for taking the time to help me out!

[jbevain]

@ltrzesniewski that’s likely the case, but if you execute the Cecil code and the patched code on the same framework (net50 here), I think you could expect the SR overloads to work.