Wrong Parent Child Relationships and lambdas

[arturbosch]

In elasticsearch there is one file (file.zip)
which throws following error.

2017-01-10 14:24:40,716 WARN   [de.unibremen.st.ismell.detection.SpoonLauncher] : Error while building spoon model 
java.lang.IllegalStateException: java.util.function.Function<org.elasticsearch.tasks.TaskId, ? extends java.lang.Iterable<? extends java.lang.Throwable>> is set as child of
Element: org.elasticsearch.action.admin.cluster.node.tasks.TasksIT#lambda$50(org.elasticsearch.tasks.TaskId)
Signature: spoon.support.reflect.reference.CtExecutableReferenceImpl@1
Class: class spoon.support.reflect.reference.CtExecutableReferenceImpl
however it is visited as a child of
Element: ( id) -> {
    java.lang.Exception e = expectThrows(java.lang.Exception.class, () -> client().admin().cluster().prepareGetTask(id).setWaitForCompletion(true).setTimeout(timeValueMillis(100)).get());
    return java.util.Collections.singleton(e);
}
Signature: spoon.support.reflect.code.CtLambdaImpl@1c20d099
Class: class spoon.support.reflect.code.CtLambdaImpl

	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:32)
	at spoon.reflect.visitor.CtScanner.visitCtLambda(CtScanner.java:589)
	at spoon.support.reflect.code.CtLambdaImpl.accept(CtLambdaImpl.java:50)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:148)
	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:36)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:137)
	at spoon.reflect.visitor.CtScanner.visitCtInvocation(CtScanner.java:479)
	at spoon.support.reflect.code.CtInvocationImpl.accept(CtInvocationImpl.java:48)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:148)
	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:36)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:137)
	at spoon.reflect.visitor.CtScanner.visitCtBlock(CtScanner.java:270)
	at spoon.support.reflect.code.CtBlockImpl.accept(CtBlockImpl.java:45)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:148)
	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:36)
	at spoon.reflect.visitor.CtScanner.visitCtMethod(CtScanner.java:535)
	at spoon.support.reflect.declaration.CtMethodImpl.accept(CtMethodImpl.java:62)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:148)
	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:36)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:137)
	at spoon.reflect.visitor.CtScanner.visitCtClass(CtScanner.java:306)
	at spoon.support.reflect.declaration.CtClassImpl.accept(CtClassImpl.java:62)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:148)
	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:36)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:137)
	at spoon.reflect.visitor.CtScanner.visitCtPackage(CtScanner.java:628)
	at spoon.support.reflect.declaration.CtPackageImpl.accept(CtPackageImpl.java:47)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:148)
	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:36)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:137)
	at spoon.reflect.visitor.CtScanner.visitCtPackage(CtScanner.java:627)
	at spoon.support.reflect.declaration.CtPackageImpl.accept(CtPackageImpl.java:47)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:148)
	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:36)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:137)
	at spoon.reflect.visitor.CtScanner.visitCtPackage(CtScanner.java:627)
	at spoon.support.reflect.declaration.CtPackageImpl.accept(CtPackageImpl.java:47)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:148)
	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:36)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:137)
	at spoon.reflect.visitor.CtScanner.visitCtPackage(CtScanner.java:627)
	at spoon.support.reflect.declaration.CtPackageImpl.accept(CtPackageImpl.java:47)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:148)
	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:36)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:137)
	at spoon.reflect.visitor.CtScanner.visitCtPackage(CtScanner.java:627)
	at spoon.support.reflect.declaration.CtPackageImpl.accept(CtPackageImpl.java:47)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:148)
	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:36)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:137)
	at spoon.reflect.visitor.CtScanner.visitCtPackage(CtScanner.java:627)
	at spoon.support.reflect.declaration.CtPackageImpl.accept(CtPackageImpl.java:47)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:148)
	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:36)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:137)
	at spoon.reflect.visitor.CtScanner.visitCtPackage(CtScanner.java:627)
	at spoon.support.reflect.declaration.CtPackageImpl.accept(CtPackageImpl.java:47)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:148)
	at spoon.reflect.visitor.AstParentConsistencyChecker.scan(AstParentConsistencyChecker.java:36)
	at spoon.reflect.visitor.CtScanner.scan(CtScanner.java:137)
	at spoon.reflect.visitor.CtScanner.visitCtPackage(CtScanner.java:627)
	at spoon.support.reflect.declaration.CtPackageImpl.accept(CtPackageImpl.java:47)
	at spoon.support.compiler.jdt.JDTBasedSpoonCompiler.checkModel(JDTBasedSpoonCompiler.java:134)
	at spoon.support.compiler.jdt.JDTBasedSpoonCompiler.build(JDTBasedSpoonCompiler.java:128)
	at spoon.support.compiler.jdt.JDTBasedSpoonCompiler.build(JDTBasedSpoonCompiler.java:102)
	at spoon.Launcher.buildModel(Launcher.java:700)
	at de.unibremen.st.ismell.detection.SpoonLauncher.build(SpoonLauncher.java:124)
	at de.unibremen.st.ismell.Analyzer.analyzeCurrentVersion(Analyzer.java:111)
	at de.unibremen.st.ismell.Analyzer.run(Analyzer.java:100)
	at de.unibremen.st.ismell.Runner.main(Runner.java:42)
	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:498)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)