When remapping a lambda, everything appears to get remapped properly except the name of the method to implement. (The invokedName parameter of LambdaMetafactory.metafactory.) This results in an AbstractMethodError when the lambda is called.

atlas has threading problems it seems. Its running into concurrent modification exceptions for getOrCreateClass on a mapping set
putting a synchronized(remapper) into the JarEntryRemappingTransformer solves it
was wondering why I was randomly missing classes, somewhere the exception gets eaten too

It doesn't seem to be possible to remove entries from a jar within a transformer as Atlas currently works -- would it be possible to allow this, by returning null out of a JarEntryTransformer or something similar?

This can allow stripping signature files or unnecessary libraries.

So, I have a bunch of Minecraft mods that I need to remap. They might all inherit from eachother in unknown ways (Minecraft mods aren't exactly known for declaring their dependencies well.) I tried using for(...) atlas.use(path) followed by for(...) atlas.run(path, outPath) but that fails with an exception saying that a ZipFileSystem for that jar file already exists.

When attempting to transform a jar compiled with JDK 17, I get java.lang.UnsupportedOperationException: PermittedSubclasses requires ASM9.

This is due to Atlas using the constructor for ClassProviderInheritanceProvider without an API version:

My temporary solution has been some ugly reflection:

atlas.install {
  // Replace the inheritance provider start
  val inheritanceProvider = AtlasTransformerContext::class.java.getDeclaredField("inheritanceProvider")
  inheritanceProvider.isAccessible = true
  val classProvider = ClassProviderInheritanceProvider::class.java.getDeclaredField("provider")
  classProvider.isAccessible = true
  inheritanceProvider.set(
    it,
    ClassProviderInheritanceProvider(
      Opcodes.ASM9,
      classProvider.get(inheritanceProvider.get(it)) as ClassProvider
    )
  )
  // Replace the inheritance provider end
  
  // return transformer to install...
}

Not sure if this should be fixed in Atlas or Bombe, so I am opening this issue. Thanks!