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javabytecodebyte-buddyjvm-bytecode

ByteBuddy: java.lang.IllegalArgumentException: Cannot attach undefined variable: V

When rebasing the class com.google.common.collect.ImmutableMultimap$Values from Google Guava, I get an IllegalArgumentException from ByteBuddy.

The inner class is a subclass of com.google.common.collect.ImmutableCollection whose method ImmutableList<E> createAsList() causes the problem.

Stacktrace:

Exception in thread "main" java.lang.IllegalArgumentException: Cannot attach undefined variable: V
at net.bytebuddy.description.type.TypeDescription$Generic$Visitor$Substitutor$ForAttachment.onTypeVariable(TypeDescription.java:1973)
at net.bytebuddy.description.type.TypeDescription$Generic$Visitor$Substitutor$ForAttachment.onTypeVariable(TypeDescription.java:1896)
at net.bytebuddy.description.type.TypeDescription$Generic$OfTypeVariable$Symbolic.accept(TypeDescription.java:5551)
at net.bytebuddy.description.type.TypeDescription$Generic$Visitor$Substitutor.onParameterizedType(TypeDescription.java:1857)
at net.bytebuddy.description.type.TypeDescription$Generic$Visitor$Substitutor$ForAttachment.onParameterizedType(TypeDescription.java:1896)
at net.bytebuddy.description.type.TypeDescription$Generic$OfParameterizedType.accept(TypeDescription.java:5017)
at net.bytebuddy.dynamic.Transformer$ForMethod$TransformedMethod.getReturnType(Transformer.java:377)
at net.bytebuddy.description.method.MethodDescription$AbstractBase.asTypeToken(MethodDescription.java:685)
at net.bytebuddy.dynamic.scaffold.MethodRegistry$Default$Prepared$Entry.resolveBridgeTypes(MethodRegistry.java:916)
at net.bytebuddy.dynamic.scaffold.MethodRegistry$Default$Prepared.compile(MethodRegistry.java:778)
at net.bytebuddy.dynamic.scaffold.TypeWriter$Default$ForInlining$RedefinitionClassVisitor.visit(TypeWriter.java:3281)
at net.bytebuddy.jar.asm.ClassReader.accept(Unknown Source)
at net.bytebuddy.jar.asm.ClassReader.accept(Unknown Source)
at net.bytebuddy.dynamic.scaffold.TypeWriter$Default$ForInlining.create(TypeWriter.java:3018)
at net.bytebuddy.dynamic.scaffold.TypeWriter$Default.make(TypeWriter.java:1617)
at net.bytebuddy.dynamic.scaffold.inline.RebaseDynamicTypeBuilder.make(RebaseDynamicTypeBuilder.java:198)
at net.bytebuddy.dynamic.scaffold.inline.AbstractInliningDynamicTypeBuilder.make(AbstractInliningDynamicTypeBuilder.java:90)
at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase.make(DynamicType.java:2566)
at net.bytebuddy.dynamic.DynamicType$Builder$AbstractBase$Delegator.make(DynamicType.java:2668)
at cl.InnerClassLoader.loadClass(InnerClassLoader.java:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at test.Stuff.<init>(Stuff.java:15)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
at java.lang.Class.newInstance(Class.java:438)
at test.Main.main(Main.java:15)

I've created an example triggering the issue here: https://github.com/erikhakansson/bytebuddytest The test was modified from an earlier test I had so there might be some garbage in there.

To test, simply run mvn clean install and then run the resulting jar.

Most likely, I'm doing something wrong, but I can't figure out what, so please help! :)

Solution

  • You have found a bug in Byte Buddy. I have resolved this issue (formerly incorrect in release 1.6.14) in Byte Buddy 1.4.17.