JsInterop compile error

Hello community:

I'm using GWT 2.8-SNAPSHOT and new annotations JsInterop.

I have a very simple class, but gives the error in compilation time.

@JsType(isNative = true, name = "Object", namespace = JsPackage.GLOBAL)
public class JsObject {
   
    public static native List getOwnPropertyNames(Object obj);
   
}

public class gwt_sample implements EntryPoint {
   
    @Override
    public void onModuleLoad() {
        JsObject.getOwnPropertyNames(new String());
    }
}

 Compiling 1 permutation
[INFO]             Compiling permutation 0...
[INFO]             [ERROR] An internal compiler exception occurred
[INFO] com.google.gwt.dev.jjs.InternalCompilerException: Unexpected error during visit.
[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.translateException(JVisitor.java:111)
[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:130)
[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:122)
[INFO] at com.google.gwt.dev.jjs.ast.JTransformer.transform(JTransformer.java:1056)
[INFO] at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST$GenerateJavaScriptTransformer.emitStaticMethods(GenerateJavaScriptAST.java:1751)
[INFO] at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST$GenerateJavaScriptTransformer.transformDeclaredType(GenerateJavaScriptAST.java:639)
[INFO] at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST$GenerateJavaScriptTransformer.transformDeclaredType(GenerateJavaScriptAST.java:514)
[INFO] at com.google.gwt.dev.jjs.ast.JTransformer.transformClassType(JTransformer.java:95)
[INFO] at com.google.gwt.dev.jjs.ast.JTransformer$JRewriterVisitor.visit(JTransformer.java:670)
[INFO] at com.google.gwt.dev.jjs.ast.JClassType.traverse(JClassType.java:140)
[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:127)
[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:122)
[INFO] at com.google.gwt.dev.jjs.ast.JTransformer.transform(JTransformer.java:1056)
[INFO] at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST$GenerateJavaScriptTransformer.transformProgram(GenerateJavaScriptAST.java:1202)
[INFO] at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST$GenerateJavaScriptTransformer.transformProgram(GenerateJavaScriptAST.java:514)
[INFO] at com.google.gwt.dev.jjs.ast.JTransformer$JRewriterVisitor.visit(JTransformer.java:918)
[INFO] at com.google.gwt.dev.jjs.ast.JProgram.traverse(JProgram.java:1252)
[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:127)
[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:122)
[INFO] at com.google.gwt.dev.jjs.ast.JTransformer.transform(JTransformer.java:1056)
[INFO] at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST.execImpl(GenerateJavaScriptAST.java:3001)
[INFO] at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST.exec(GenerateJavaScriptAST.java:2782)
[INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.compilePermutation(JavaToJavaScriptCompiler.java:377)
[INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.compilePermutation(JavaToJavaScriptCompiler.java:272)
[INFO] at com.google.gwt.dev.CompilePerms.compile(CompilePerms.java:198)
[INFO] at com.google.gwt.dev.ThreadedPermutationWorkerFactory$ThreadedPermutationWorker.compile(ThreadedPermutationWorkerFactory.java:50)
[INFO] at com.google.gwt.dev.PermutationWorkerFactory$Manager$WorkerThread.run(PermutationWorkerFactory.java:74)
[INFO] at java.lang.Thread.run(Thread.java:745)
[INFO] Caused by: java.lang.NullPointerException
[INFO] at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST$GenerateJavaScriptTransformer.transformMethod(GenerateJavaScriptAST.java:788)
[INFO] at com.google.gwt.dev.jjs.impl.GenerateJavaScriptAST$GenerateJavaScriptTransformer.transformMethod(GenerateJavaScriptAST.java:514)
[INFO] at com.google.gwt.dev.jjs.ast.JTransformer$JRewriterVisitor.visit(JTransformer.java:823)
[INFO] at com.google.gwt.dev.jjs.ast.JMethod.traverse(JMethod.java:715)
[INFO] at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:127)
[INFO] ... 26 more
[INFO]                [ERROR] at JsObject.java(19): com.logikas.gwt.sample.client.JsObject.getOwnPropertyNames(Ljava/lang/Object;)Ljava/util/List;
[INFO]                   com.google.gwt.dev.jjs.ast.JMethod
[INFO]                [ERROR] at JsObject.java(17): com.logikas.gwt.sample.client.JsObject (extends Object)
[INFO]                   com.google.gwt.dev.jjs.ast.JClassType
[INFO]                [ERROR] at Unknown(0): <JProgram>
[INFO]                   com.google.gwt.dev.jjs.ast.JProgram
[INFO]             [ERROR] Unrecoverable exception, shutting down
[INFO] com.google.gwt.core.ext.UnableToCompleteException: (see previous log entries)
[INFO] at com.google.gwt.dev.javac.CompilationProblemReporter.logAndTranslateException(CompilationProblemReporter.java:106)
[INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.compilePermutation(JavaToJavaScriptCompiler.java:459)
[INFO] at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.compilePermutation(JavaToJavaScriptCompiler.java:272)
[INFO] at com.google.gwt.dev.CompilePerms.compile(CompilePerms.java:198)
[INFO] at com.google.gwt.dev.ThreadedPermutationWorkerFactory$ThreadedPermutationWorker.compile(ThreadedPermutationWorkerFactory.java:50)
[INFO] at com.google.gwt.dev.PermutationWorkerFactory$Manager$WorkerThread.run(PermutationWorkerFactory.java:74)
[INFO] at java.lang.Thread.run(Thread.java:745)
[INFO]             [ERROR] Not all permutation were compiled , completed (0/1)
[INFO]       [WARN] recompile failed
[INFO]       [WARN] continuing to serve previous version

Any idea?

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