Malformed recursive generic types can cause CrossGen crash or hang #5907
Description
Test case tests/src/Loader/classloader/generics/regressions/DD117522/Test.csproj contains a malformed infinitely recursive generic type definition. During app execution, this is correctly handled by throwing a TypeLoadException. However, CrossGen isn't able to handle this correctly, and either crashes with a stack overflow (on Windows) or hangs (on Ubuntu). This test case is being temporarily disabled by dotnet/coreclr#5122, but we need to find a proper fix for this in CrossGen.