Jtreg hotspot test compiler/cha/StrengthReduceInterfaceCall.java fails in the Valhalla nestmates repo with the following error:

Caused by: java.lang.IncompatibleClassChangeError: Type compiler.cha.StrengthReduceInterfaceCall$ObjectToString (loader: compiler.cha.StrengthReduceInterfaceCall$MyClassLoader @5e8ad876) is not a nest member of compiler.cha.StrengthReduceInterfaceCall (loader: 'app'): types are in different packages