May not be compatible with retrolambda 1.6.1+

[evant]

The latest versions of retrolambda no longer use the javaagent. Some modifications probably need to be done to make that work.

[meoyawn]

same thing for me - does not work with retrolambda 1.6.1 and plugin 2.2.3
says javac exited with code 1 and no error description

[evant]

It looks like 1.6.1 is not working, but for a different reason than the javaagent.

Error! Failed to transform some classes                         
java.lang.SecurityException: Prohibited package name: java.lang 
        at java.lang.ClassLoader.preDefineClass(ClassLoader.java:659)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:758)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
        at net.orfjackal.retrolambda.NonDelegatingClassLoader.loadClass(NonDelegatingClassLoader.java:22)
        at java.lang.ClassLoader.defineClass1(Native Method)    
        at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
        at net.orfjackal.retrolambda.NonDelegatingClassLoader.loadClass(NonDelegatingClassLoader.java:22)
        at net.orfjackal.retrolambda.LambdaUsageBackporter$InvokeDynamicInsnConvertingMethodVisitor.loadClass(LambdaUsageBackporter.java:173)
        at net.orfjackal.retrolambda.LambdaUsageBackporter$InvokeDynamicInsnConvertingMethodVisitor.backportLambda(LambdaUsageBackporter.java:161)
        at net.orfjackal.retrolambda.LambdaUsageBackporter$InvokeDynamicInsnConvertingMethodVisitor.visitInvokeDynamicInsn(LambdaUsageBackporter.java:154)
        at net.orfjackal.retrolambda.asm.ClassReader.readCode(ClassReader.java:1439)
        at net.orfjackal.retrolambda.asm.ClassReader.readMethod(ClassReader.java:1017)
        at net.orfjackal.retrolambda.asm.ClassReader.accept(ClassReader.java:693)
        at net.orfjackal.retrolambda.asm.ClassReader.accept(ClassReader.java:506)
        at net.orfjackal.retrolambda.LambdaUsageBackporter.transform(LambdaUsageBackporter.java:22)
        at net.orfjackal.retrolambda.Retrolambda$1.transform(Retrolambda.java:42)
        at net.orfjackal.retrolambda.BytecodeTransformingFileVisitor.visitFile(BytecodeTransformingFileVisitor.java:25)
        at net.orfjackal.retrolytecodeTransformingFileVisitor.visitFile(BytecodeTransformingFileVisitor.java:11)
        at java.nio.file.Files.walkFileTree(Files.java:2670)    
        at java.nio.file.Files.walkFileTree(Files.java:2742)    
        at net.orfjackal.retrolambda.Retrolambda.visitFiles(Retrolambda.java:52)
        at net.orfjackal.retrolambda.Retrolambda.run(Retrolambda.java:39)
        at net.orfjackal.retrolambda.Main.main(Main.java:26)

[evant]

I opened an issue with retrolamba because I don't think this is anything the gradle plugin is doing. luontola/retrolambda#34

[luontola]

The javaagent is optional in latest Retrolambda versions, but it's still supported. In some cases it may be necessary to fallback to using the javaagent (e.g. if the JDK implementation changes), so it should be good to provide an option for using it.

But as you noticed, the "java.lang.SecurityException: Prohibited package name: java.lang" problem is unrelated to the javaagent.

[evant]

Alright I'll add an option to enable/disable the javaagent. Right now it's based on the retrolambda version, but it would be useful anyway since that can't always be determined.

[evant]

Fixed in retrolambda 1.6.2