GWT compiler guru help need ...

[Rocco De Angelis]

Hi All,

I checked out the latest version (trunk) of GWT from git and tried to compile my current project with this state of GWT.

But during the compiling of the permutation I get an error message:

 Compiling 1 permutation

      Creating PermutationWorkerFactory instances

      Compiling permutation 0...

      [ERROR] An internal compiler exception occurred

com.google.gwt.dev.jjs.InternalCompilerException: Unexpected error during visit.

at com.google.gwt.dev.jjs.ast.JVisitor.translateException(JVisitor.java:110)

at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:148)

at com.google.gwt.dev.jjs.ast.JVisitor.acceptWithInsertRemoveImmutable(JVisitor.java:171)

at com.google.gwt.dev.jjs.ast.JClassType.traverse(JClassType.java:98)

at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:126)

at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:121)

at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST$CreateNamesAndScopesVisitor.visit(GenerateJavaScriptAST.java:332)

at com.google.gwt.dev.jjs.ast.JClassType.traverse(JClassType.java:96)

at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:126)

at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:121)

at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST$CreateNamesAndScopesVisitor.visit(GenerateJavaScriptAST.java:332)

at com.google.gwt.dev.jjs.ast.JClassType.traverse(JClassType.java:96)

at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:145)

at com.google.gwt.dev.jjs.ast.JProgram.traverse(JProgram.java:974)

at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:126)

at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:121)

at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST.execImpl(GenerateJavaScriptAST.java:2790)

at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST.exec(GenerateJavaScriptAST.java:2501)

at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.compilePermutation(JavaToJavaScriptCompiler.java:355)

at com.google.gwt.dev.jjs.UnifiedAst.compilePermutation(UnifiedAst.java:134)

at com.google.gwt.dev.CompilePerms.compile(CompilePerms.java:195)

at com.google.gwt.dev.ThreadedPermutationWorkerFactory$ThreadedPermutationWorker.compile(ThreadedPermutationWorkerFactory.java:49)

at com.google.gwt.dev.PermutationWorkerFactory$Manager$WorkerThread.run(PermutationWorkerFactory.java:73)

at java.lang.Thread.run(Thread.java:662)

Caused by: java.lang.NullPointerException

at com.google.gwt.thirdparty.guava.common.base.Preconditions.checkNotNull(Preconditions.java:192)

at com.google.gwt.thirdparty.guava.common.collect.MapMakerInternalMap.putIfAbsent(MapMakerInternalMap.java:3507)

at com.google.gwt.thirdparty.guava.common.collect.Interners$WeakInterner.intern(Interners.java:85)

at com.google.gwt.dev.js.ast.JsScope.maybeMangleKeyword(JsScope.java:53)

at com.google.gwt.dev.js.ast.JsScope.declareName(JsScope.java:68)

at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST$CreateNamesAndScopesVisitor.visit(GenerateJavaScriptAST.java:369)

at com.google.gwt.dev.jjs.ast.JMethod.traverse(JMethod.java:417)

at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:145)

... 22 more

         [ERROR] at Object.java(79): protected Object clone();

            com.google.gwt.dev.jjs.ast.JMethod

         [ERROR] at Object.java(26): class Object 

            com.google.gwt.dev.jjs.ast.JClassType

         [ERROR] at AbstractStyledText.java(12): abstract class AbstractStyledText extends Object 

            com.google.gwt.dev.jjs.ast.JClassType

         [ERROR] at DefaultStyledText.java(13): final class DefaultStyledText extends AbstractStyledText 

            com.google.gwt.dev.jjs.ast.JClassType

         [ERROR] at Unknown(0): <JProgram>

            com.google.gwt.dev.jjs.ast.JProgram

      [ERROR] Unrecoverable exception, shutting down

com.google.gwt.core.ext.UnableToCompleteException: (see previous log entries)

at com.google.gwt.dev.javac.CompilationProblemReporter.logAndTranslateException(CompilationProblemReporter.java:90)

at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.compilePermutation(JavaToJavaScriptCompiler.java:549)

at com.google.gwt.dev.jjs.UnifiedAst.compilePermutation(UnifiedAst.java:134)

at com.google.gwt.dev.CompilePerms.compile(CompilePerms.java:195)

at com.google.gwt.dev.ThreadedPermutationWorkerFactory$ThreadedPermutationWorker.compile(ThreadedPermutationWorkerFactory.java:49)

at com.google.gwt.dev.PermutationWorkerFactory$Manager$WorkerThread.run(PermutationWorkerFactory.java:73)

at java.lang.Thread.run(Thread.java:662)

      [ERROR] Not all permutation were compiled , completed (0/1)

Shutting down PersistentUnitCache thread

What looks very strange for me: The class DefaultStyledText is not in my source path and it is also not final??

public class DefaultStyledText extends AbstractStyledText<AStyledDocument> {

    public DefaultStyledText(AStyledDocument document) {

        super(document);

    }

    @Override

    public String getPlainText() {

        return getValue().getPlainText();

    }

}

I have my own Object.java implementation. I simply added a implementation for the clone method:

    protected native Object clone() throws CloneNotSupportedException /*-{

        var r = {};

        // prevents to use same hash code

        @com.google.gwt.core.client.impl.Impl::getHashCode(Ljava/lang/Object;)(r);

        var o = this;

        for(var i in o){

            if(!(i in r)){

                r[i] = o[i];

            }

        }

        return r;

    }-*/;

Anybody of the GWT gurus here an idea???

[Rocco De Angelis]

Seems to be a bug in the GWT compiler.

Adding following line to the GenerateJavaScriptAST solves the problem:

line number 2627: namesToIdents.put("clone", "cL");

See patched file