Bug in generic interfaces with default implementations

[wimvangool]

I've bumped into a strange issue that when I..

• Implement a generic interface with at least one generic type parameter, and...
• Add two generic overloads to that interface, where the type parameter constraint on the method's generic type parameter references the parent interface's generic type parameter, and...
• One of the overloads provides a default implementation...

...then when I try to call the interface's overload that provides the default implementation with a type parameter that satisfies all constraint, the compiler thinks it's fine, but the run-time throws a System.Security.VerificationException at the point of invoking the interface method.

For more explanation and a way to reproduce this error, see my question on StackOverflow.

[Dotnet-GitSync-Bot]

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[jkotas]

cc @MichalStrehovsky

[vcsjones]

According to the linked Stack Overflow post, this is a dupe of #13588.

[mangod9]

This is a dupe of #1674, which has been recently fixed.