'Never found a JavaCodeUnit' for Kotlin 'groupingBy' in 0.23.0

[pkubowicz]

Using 'groupingBy' in Kotlin:

val duplicatedIso = countries.groupingBy { it.iso }

works in ArchUnit 0.22.0 but crashes 0.23.0:

java.lang.IllegalStateException: Never found a JavaCodeUnit that matches supposed origin
CodeUnit{name='keyOf', descriptor=(Ljava/lang/Object;)Ljava/lang/Object;, declaringClassName='com.example.CountryValidator$failOnDuplicatedIso$$inlined$groupingBy$1'}
	at com.tngtech.archunit.core.importer.AccessRecord$Factory.getOrigin(AccessRecord.java:325)
	at com.tngtech.archunit.core.importer.AccessRecord$Factory.access$1200(AccessRecord.java:67)
	at com.tngtech.archunit.core.importer.AccessRecord$Factory$10.get(AccessRecord.java:314)
	at com.tngtech.archunit.core.importer.AccessRecord$Factory$10.get(AccessRecord.java:311)
	at com.tngtech.archunit.thirdparty.com.google.common.base.Suppliers$NonSerializableMemoizingSupplier.get(Suppliers.java:167)
	at com.tngtech.archunit.core.importer.AccessRecord$Factory$RawAccessRecordProcessed.getOrigin(AccessRecord.java:282)
	at com.tngtech.archunit.core.importer.ClassGraphCreator.tryProcess(ClassGraphCreator.java:146)

A project that reproduces the bug: https://github.com/pkubowicz/archunit-accessrecord-bug (see GitHub action result).

[codecholeric]

Thanks a lot for raising the issue and in particular for taking the effort to provide a sample 😃 This is likely due to the more strict search for matching methods to disambiguate bridge methods from real methods 🤔 I guess in Kotlin there is some compiler magic that doesn't match anymore now, but I'll look into it 👍

[codecholeric]

I think I found the culprit: It seems to happen if the generic signature of the return type of a method is out of sync with the descriptor 😬 I.e. The descriptor says the return type is Object, but the signature says it's String from the generic context. I'll try to release a fix within the next couple of days...