Re: Errors migrating to GWT 2.7.0 . Can someone please help me ?

Same problem here.  I'm compiling with Oracle's 1.7.0.u45 JDK.  I get a bunch of warnings like this:

   [WARN] Unable to read: jar:file:/C:/gwt-2.7.0/gwt-user.jar!/com/google/gwt/core/Core.gwtar. Skipping: java.io.InvalidClassException: com.google.gwt.dev.jjs.SourceOrigin$1; local class incompatible: stream classdesc serialVersionUID = -2407201776821563037, local class serialVersionUID = 4713379764594032837

before my compile terminates with this:

   Adding '1' new generated units

      Compiling...

         Compilation completed in 0.01 seconds

      Removing invalidated units

   [ERROR] Unexpected internal compiler error

java.lang.RuntimeException: Unexpected IOException on in-memory stream

at com.google.gwt.dev.javac.CompilationUnit.getTypes(CompilationUnit.java:383)

at com.google.gwt.dev.jjs.impl.UnifyAst.assimilateSourceUnit(UnifyAst.java:999)

at com.google.gwt.dev.jjs.impl.UnifyAst.internalFindType(UnifyAst.java:1595)

at com.google.gwt.dev.jjs.impl.UnifyAst.addRootTypes(UnifyAst.java:733)

at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.unifyJavaAst(JavaToJavaScriptCompiler.java:1291)

at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.constructJavaAst(JavaToJavaScriptCompiler.java:1038)

at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.precompile(JavaToJavaScriptCompiler.java:954)

at com.google.gwt.dev.jjs.MonolithicJavaToJavaScriptCompiler.precompile(MonolithicJavaToJavaScriptCompiler.java:303)

at com.google.gwt.dev.jjs.JavaScriptCompiler.precompile(JavaScriptCompiler.java:38)

at com.google.gwt.dev.Precompile.precompile(Precompile.java:286)

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

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

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

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

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

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

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

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

Caused by: java.io.InvalidClassException: com.google.gwt.dev.jjs.SourceOrigin$1; local class incompatible: stream classdesc serialVersionUID = -2407201776821563037, local class serialVersionUID = 4713379764594032837

at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:632)

at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1600)

at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1513)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1749)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)

at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1964)

at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1888)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)

at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1964)

at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1888)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)

at java.io.ObjectInputStream.readObject(ObjectInputStream.java:365)

at java.util.ArrayList.readObject(ArrayList.java:731)

at sun.reflect.GeneratedMethodAccessor23.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)

at java.lang.reflect.Method.invoke(Method.java:611)

at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1044)

at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1866)

at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)

at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)

at java.io.ObjectInputStream.readObject(ObjectInputStream.java:365)

at com.google.gwt.dev.jjs.ast.JDeclaredType.readMembers(JDeclaredType.java:412)

at com.google.gwt.dev.jjs.ast.JProgram.deserializeTypes(JProgram.java:229)

at com.google.gwt.dev.javac.CompilationUnit.getTypes(CompilationUnit.java:381)

... 17 more

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