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

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Unexpected error during visit.
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java.lang.NullPointerException:
at com.google.gwt.dev.jjs.ast.JMethod.getJsniSignature(JMethod.java:618)
at com.google.gwt.dev.jjs.impl.ControlFlowRecorder.computeName(ControlFlowRecorder.java:53)
at com.google.gwt.dev.jjs.impl.ControlFlowRecorder.processMethodCall(ControlFlowRecorder.java:212)
at com.google.gwt.dev.jjs.impl.ControlFlowRecorder.visit(ControlFlowRecorder.java:157)
at com.google.gwt.dev.jjs.ast.JMethodCall.traverse(JMethodCall.java:256)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:146)
at com.google.gwt.dev.jjs.ast.JVisitor.acceptImmutable(JVisitor.java:154)
at com.google.gwt.dev.jjs.ast.JMethodCall.visitChildren(JMethodCall.java:266)
at com.google.gwt.dev.jjs.ast.JMethodCall.traverse(JMethodCall.java:257)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:146)
at com.google.gwt.dev.jjs.ast.JVisitor.acceptImmutable(JVisitor.java:154)
at com.google.gwt.dev.jjs.ast.JMethodCall.visitChildren(JMethodCall.java:266)
at com.google.gwt.dev.jjs.ast.JMethodCall.traverse(JMethodCall.java:257)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:146)
at com.google.gwt.dev.jjs.ast.JVisitor.acceptImmutable(JVisitor.java:154)
at com.google.gwt.dev.jjs.ast.JMethodCall.visitChildren(JMethodCall.java:266)
at com.google.gwt.dev.jjs.ast.JMethodCall.traverse(JMethodCall.java:257)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:127)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:122)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:118)
at com.google.gwt.dev.jjs.ast.JDeclarationStatement.traverse(JDeclarationStatement.java:49)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:146)
at com.google.gwt.dev.jjs.ast.JVisitor.acceptWithInsertRemove(JVisitor.java:168)
at com.google.gwt.dev.jjs.ast.JBlock.traverse(JBlock.java:92)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:127)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:139)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:135)
at com.google.gwt.dev.jjs.ast.JMethodBody.traverse(JMethodBody.java:83)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:127)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:122)
at com.google.gwt.dev.jjs.ast.JMethod.visitChildren(JMethod.java:788)
at com.google.gwt.dev.jjs.ast.JMethod.traverse(JMethod.java:780)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:146)
at com.google.gwt.dev.jjs.ast.JVisitor.acceptWithInsertRemoveImmutable(JVisitor.java:172)
at com.google.gwt.dev.jjs.ast.JClassType.traverse(JClassType.java:147)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:127)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:122)
at com.google.gwt.dev.jjs.ast.JProgram.visitModuleTypes(JProgram.java:1284)
at com.google.gwt.dev.jjs.ast.JProgram.traverse(JProgram.java:1249)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:127)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:122)
at com.google.gwt.dev.jjs.impl.ControlFlowRecorder.execImpl(ControlFlowRecorder.java:162)
at com.google.gwt.dev.jjs.impl.ControlFlowRecorder.exec(ControlFlowRecorder.java:49)
at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.maybeRecordReferencesAndControlFlow(JavaToJavaScriptCompiler.java:474)
at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.compilePermutation(JavaToJavaScriptCompiler.java:352)
at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler.compilePermutation(JavaToJavaScriptCompiler.java:272)
at com.google.gwt.dev.CompilePerms.compile(CompilePerms.java:198)
at com.google.gwt.dev.ThreadedPermutationWorkerFactory$ThreadedPermutationWorker.compile(ThreadedPermutationWorkerFactory.java:50)
at java.lang.Thread.run(Thread.java:745)

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