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NPE in noclasspath #406

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monperrus opened this issue Nov 13, 2015 · 5 comments
Closed

NPE in noclasspath #406

monperrus opened this issue Nov 13, 2015 · 5 comments

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@monperrus
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spoon4.3 -x -i IndexWriter.java (attached
IndexWriter.java.txt
)

results in

java.lang.NullPointerException
    at spoon.support.compiler.jdt.JDTTreeBuilder.visit(JDTTreeBuilder.java:2255)
    at org.eclipse.jdt.internal.compiler.ast.MessageSend.traverse(MessageSend.java:1008)
    at spoon.support.compiler.jdt.JDTTreeBuilder.buildCommonPartForCtNewClassAndCtConstructorCall(JDTTreeBuilder.java:1636)
    at spoon.support.compiler.jdt.JDTTreeBuilder.visit(JDTTreeBuilder.java:2474)
    at org.eclipse.jdt.internal.compiler.ast.QualifiedAllocationExpression.traverse(QualifiedAllocationExpression.java:587)
    at spoon.support.compiler.jdt.JDTTreeBuilder.visit(JDTTreeBuilder.java:2274)
    at org.eclipse.jdt.internal.compiler.ast.MessageSend.traverse(MessageSend.java:1008)
    at org.eclipse.jdt.internal.compiler.ast.Block.traverse(Block.java:136)
    at org.eclipse.jdt.internal.compiler.ast.SynchronizedStatement.traverse(SynchronizedStatement.java:212)
    at spoon.support.compiler.jdt.JDTTreeBuilder.visit(JDTTreeBuilder.java:1937)
    at org.eclipse.jdt.internal.compiler.ast.ConstructorDeclaration.traverse(ConstructorDeclaration.java:577)
    at spoon.support.compiler.jdt.JDTTreeBuilder.visit(JDTTreeBuilder.java:3024)
    at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1338)
    at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.traverse(CompilationUnitDeclaration.java:748)
    at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.traverse(CompilationUnitDeclaration.java:709)
    at spoon.support.compiler.jdt.JDTBasedSpoonCompiler.buildSources(JDTBasedSpoonCompiler.java:247)
    at spoon.support.compiler.jdt.JDTBasedSpoonCompiler.build(JDTBasedSpoonCompiler.java:500)
    at fr.inria.sacha.spoon.diffSpoon.DiffSpoon.getCtClass(DiffSpoon.java:108)
    at fr.inria.sacha.spoon.diffSpoon.DiffSpoon.compare(DiffSpoon.java:148)
    at fr.inria.sacha.spoon.diffSpoon.DiffSpoonTest.test_t_224771(DiffSpoonTest.java:706)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
@GerardPaligot
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This bug is already fixed in the version 4.4.0 but there is another bug with anonymous class in noclasspath.

This is the anonymous class:

new Lock.With(directory.makeLock("commit.lock")) {
    public Object doBody() throws IOException {
        if (create)
            segmentInfos.write(directory);
        else
            segmentInfos.read(directory);
        return null;
    }
}.run();

This is the stacktrace:

java.lang.NullPointerException
    at spoon.support.compiler.jdt.JDTTreeBuilder.createType(JDTTreeBuilder.java:973)
    at spoon.support.compiler.jdt.JDTTreeBuilder.visit(JDTTreeBuilder.java:3004)
    at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1374)
    at spoon.support.compiler.jdt.JDTTreeBuilder.visit(JDTTreeBuilder.java:2542)
    at org.eclipse.jdt.internal.compiler.ast.QualifiedAllocationExpression.traverse(QualifiedAllocationExpression.java:604)
    at spoon.support.compiler.jdt.JDTTreeBuilder.visit(JDTTreeBuilder.java:2341)
    at org.eclipse.jdt.internal.compiler.ast.MessageSend.traverse(MessageSend.java:1031)
    at org.eclipse.jdt.internal.compiler.ast.Block.traverse(Block.java:139)
    at org.eclipse.jdt.internal.compiler.ast.SynchronizedStatement.traverse(SynchronizedStatement.java:212)
    at spoon.support.compiler.jdt.JDTTreeBuilder.visit(JDTTreeBuilder.java:1989)
    at org.eclipse.jdt.internal.compiler.ast.ConstructorDeclaration.traverse(ConstructorDeclaration.java:605)
    at spoon.support.compiler.jdt.JDTTreeBuilder.visit(JDTTreeBuilder.java:3085)
    at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1319)
    at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.traverse(CompilationUnitDeclaration.java:748)
    at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.traverse(CompilationUnitDeclaration.java:709)
    at spoon.support.compiler.jdt.JDTBasedSpoonCompiler.buildSources(JDTBasedSpoonCompiler.java:227)
    at spoon.support.compiler.jdt.JDTBasedSpoonCompiler.build(JDTBasedSpoonCompiler.java:480)
    at spoon.Launcher.buildModel(Launcher.java:664)
    at spoon.Launcher.run(Launcher.java:616)
    at spoon.test.invocations.InvocationTest.testInvocation(InvocationTest.java:69)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)

@GerardPaligot
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We have a problem here. In noclasspath, JDT returns 0 information about the class which covers the anonymous class.

@monperrus
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can we simply work around the exception and having at least an
incomplete model?

@GerardPaligot
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We can create a CtClass without data inside.

@monperrus
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OK for me.

@GerardPaligot GerardPaligot mentioned this issue Nov 19, 2015
Merged
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@monperrus @GerardPaligot