breaks on JDK 15

[codefromthecrypt]

Unfortunately, I'm failing to use JDK 15 even though JDK 14 is fine now.

     [exec] Java HotSpot(TM) 64-Bit Server VM warning: Sharing is only supported for boot loader classes because bootstrap classpath has been appended
     [exec] 00:00 ERROR: Failed to transform java/lang/invoke/InnerClassLambdaMetafactory, cannot enable the Java agent. Please report an issue to Retrolamb
da with full logs. Probably you're running on an unsupported Java version.
     [exec] java.lang.RuntimeException: Could not find the toByteArray call
     [exec]     at net.orfjackal.retrolambda.lambdas.InnerClassLambdaMetafactoryTransformer.transformMetafactory(InnerClassLambdaMetafactoryTransformer.java
:73)
     [exec]     at net.orfjackal.retrolambda.lambdas.InnerClassLambdaMetafactoryTransformer.transform(InnerClassLambdaMetafactoryTransformer.java:22)
     [exec]     at java.instrument/java.lang.instrument.ClassFileTransformer.transform(ClassFileTransformer.java:246)
     [exec]     at java.instrument/sun.instrument.TransformerManager.transform(TransformerManager.java:188)
     [exec]     at java.instrument/sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:563)
     [exec]     at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses0(Native Method)
     [exec]     at java.instrument/sun.instrument.InstrumentationImpl.retransformClasses(InstrumentationImpl.java:167)
     [exec]     at net.orfjackal.retrolambda.PreMain.premain(PreMain.java:22)
     [exec]     at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     [exec]     at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
     [exec]     at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
     [exec]     at java.base/java.lang.reflect.Method.invoke(Method.java:564)
     [exec]     at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:513)
     [exec]     at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:525)
     [exec] Retrolambda 2.5.7
     [exec] 00:00 ERROR: Failed to run Retrolambda
     [exec] java.lang.IllegalStateException: Cannot initialize dumper; unexpected JDK implementation. Please run Retrolambda using the Java agent (enable forking in the Maven plugin).
     [exec]     at net.orfjackal.retrolambda.lambdas.LambdaClassDumper.install(LambdaClassDumper.java:38)
     [exec]     at net.orfjackal.retrolambda.Retrolambda.run(Retrolambda.java:67)
     [exec]     at net.orfjackal.retrolambda.Main.main(Main.java:28)
     [exec]     Suppressed: java.lang.RuntimeException: java.lang.IllegalAccessException: class net.orfjackal.retrolambda.lambdas.LambdaClassDumper cannot access a member of class java.lang.invoke.InnerClassLambdaMetafactory (in module java.base) with modifiers "private static final"
     [exec]             at net.orfjackal.retrolambda.lambdas.LambdaClassDumper.uninstall(LambdaClassDumper.java:48)
     [exec]             at net.orfjackal.retrolambda.lambdas.LambdaClassDumper.close(LambdaClassDumper.java:55)
     [exec]             at net.orfjackal.retrolambda.Retrolambda.run(Retrolambda.java:102)
     [exec]             ... 1 more
     [exec]     Caused by: java.lang.IllegalAccessException: class net.orfjackal.retrolambda.lambdas.LambdaClassDumper cannot access a member of class java.lang.invoke.InnerClassLambdaMetafactory (in module java.base) with modifiers "private static final"
     [exec]             at java.base/jdk.internal.reflect.Reflection.newIllegalAccessException(Reflection.java:385)
     [exec]             at java.base/java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:693)
     [exec]             at java.base/java.lang.reflect.Field.checkAccess(Field.java:1096)
     [exec]             at java.base/java.lang.reflect.Field.set(Field.java:791)
     [exec]             at net.orfjackal.retrolambda.lambdas.LambdaClassDumper.uninstall(LambdaClassDumper.java:46)
     [exec]             ... 3 more
     [exec] Caused by: java.lang.RuntimeException: Failed to make a field non-final (private static final java.lang.invoke.ProxyClassesDumper java.lang.invoke.InnerClassLambdaMetafactory.dumper). This known to fail on Java 12 and newer. Prefer using Java 8 or try using the Java agent (fork=true in the Maven plugin).
     [exec]     at net.orfjackal.retrolambda.lambdas.LambdaClassDumper.makeNonFinal(LambdaClassDumper.java:65)
     [exec]     at net.orfjackal.retrolambda.lambdas.LambdaClassDumper.install(LambdaClassDumper.java:32)
     [exec]     ... 2 more
     [exec] Caused by: java.lang.NoSuchFieldException: modifiers
     [exec]     at java.base/java.lang.Class.getDeclaredField(Class.java:2569)
     [exec]     at net.orfjackal.retrolambda.lambdas.LambdaClassDumper.makeNonFinal(LambdaClassDumper.java:60)
     [exec]     ... 3 more

These links might be helpful (or random waste of your time!)..

dusanboskovic/openj9@b62eb85
oracle/graal#2455

[teras]

I have exactly the same issue.

[luontola]

Please run Retrolambda using JDK 8. Newer versions are not supported and there are multiple known incompatibilities with them (e.g. this error happens on JDK 12 and higher, IIRC).