GWT 2.6.0 to 2.7.0 leads to compiler error 'java.lang.IncompatibleClassChangeError'

Hello,

after switching to GWT 2.7.0 I cannot build our project anymore. I cleaned everything in my Maven target folder (gwt unit cache, build classes, ...) but with no luck.

Every time I get this stacktrace:

[INFO] [ERROR] Unexpected internal compiler error

[INFO] java.lang.IncompatibleClassChangeError: class com.google.gwt.dev.javac.asm.CollectMethodData has interface org.objectweb.asm.MethodVisitor as super class

[INFO] at java.lang.ClassLoader.defineClass1(Native Method)

[INFO] at java.lang.ClassLoader.defineClass(ClassLoader.java:760)

[INFO] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)

[INFO] at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)

[INFO] at java.net.URLClassLoader.access$100(URLClassLoader.java:73)

[INFO] at java.net.URLClassLoader$1.run(URLClassLoader.java:367)

[INFO] at java.net.URLClassLoader$1.run(URLClassLoader.java:361)

[INFO] at java.security.AccessController.doPrivileged(Native Method)

[INFO] at java.net.URLClassLoader.findClass(URLClassLoader.java:360)

[INFO] at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

[INFO] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)

[INFO] at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

[INFO] at java.lang.Class.getDeclaredMethods0(Native Method)

[INFO] at java.lang.Class.privateGetDeclaredMethods(Class.java:2688)

[INFO] at java.lang.Class.getDeclaredMethod(Class.java:2115)

[INFO] at java.io.ObjectStreamClass.getPrivateMethod(ObjectStreamClass.java:1431)

[INFO] at java.io.ObjectStreamClass.access$1700(ObjectStreamClass.java:72)

[INFO] at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:494)

[INFO] at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:468)

[INFO] at java.security.AccessController.doPrivileged(Native Method)

[INFO] at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:468)

[INFO] at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:365)

[INFO] at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:602)

[INFO] at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1623)

[INFO] at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1518)

[INFO] at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1774)

[INFO] at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)

[INFO] at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1993)

[INFO] at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:501)

[INFO] at com.google.gwt.dev.javac.CachedCompilationUnit.readObject(CachedCompilationUnit.java:204)

[INFO] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

[INFO] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

[INFO] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

[INFO] at java.lang.reflect.Method.invoke(Method.java:483)

[INFO] at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)

[INFO] at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1896)

[INFO] at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)

[INFO] at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)

[INFO] at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1707)

[INFO] at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1345)

[INFO] at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)

[INFO] at com.google.gwt.dev.javac.CompilationUnitArchive.readObject(CompilationUnitArchive.java:124)

[INFO] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

[INFO] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

[INFO] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

[INFO] at java.lang.reflect.Method.invoke(Method.java:483)

[INFO] at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)

[INFO] at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1896)

[INFO] at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)

[INFO] at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)

[INFO] at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)

[INFO] at com.google.gwt.dev.javac.CompilationUnitArchive.createFromStream(CompilationUnitArchive.java:59)

[INFO] at com.google.gwt.dev.javac.CompilationUnitArchive.createFromURL(CompilationUnitArchive.java:66)

[INFO] at com.google.gwt.dev.ArchivePreloader.preloadArchives(ArchivePreloader.java:62)

[INFO] at com.google.gwt.dev.Precompile.precompile(Precompile.java:246)

[INFO] at com.google.gwt.dev.Precompile.precompile(Precompile.java:229)

[INFO] at com.google.gwt.dev.Precompile.precompile(Precompile.java:145)

[INFO] at com.google.gwt.dev.Compiler.run(Compiler.java:206)

[INFO] at com.google.gwt.dev.Compiler.run(Compiler.java:158)

[INFO] at com.google.gwt.dev.Compiler$1.run(Compiler.java:120)

[INFO] at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:55)

[INFO] at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:50)

[INFO] at com.google.gwt.dev.Compiler.main(Compiler.java:127)

[INFO] ------------------------------------------------------------------------

[INFO] BUILD FAILURE

I found the same problem in the GWT contributor group, but I cannot find any solution for it to solve.

Thanks for help.

Stephan

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