Details
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Bug
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Status: Closed
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Major
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Resolution: Fixed
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11.3
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None
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NetBeans 11.3 with nbjavac plugin installed
Description
If, during editing, a comma is momentarily deleted in the parameter list of a method (in certain cases), an error dialog shows up showing an IndexOutOfBoundsException in SemanticHighlighterBase$DetectorVisitor.addParameterInlineHint. A minimized example exhibiting this behavior is as follows:
public class BugSemanticHighlighterBase { private Object testMethod(final String arg1 final String arg2) { return new String(""); } }
This example causes the IDE to throw the following exception:
java.lang.IndexOutOfBoundsException: -1 at com.sun.tools.javac.util.List.get(List.java:482) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.addParameterInlineHint(SemanticHighlighterBase.java:1241) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitLiteral(SemanticHighlighterBase.java:1180) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitLiteral(SemanticHighlighterBase.java:424) at com.sun.tools.javac.tree.JCTree$JCLiteral.accept(JCTree.java:2410) at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82) at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:69) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:1199) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:424) at com.sun.source.util.TreeScanner.scan(TreeScanner.java:106) at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:78) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitNewClass(SemanticHighlighterBase.java:1085) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitNewClass(SemanticHighlighterBase.java:424) at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1820) at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82) at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:69) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:1199) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:424) at com.sun.source.util.TreeScanner.visitReturn(TreeScanner.java:495) at com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1663) at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82) at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:69) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:1199) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:424) at com.sun.source.util.TreeScanner.scan(TreeScanner.java:106) at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:78) at com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:249) at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1048) at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82) at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:69) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:1199) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:424) at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:91) at com.sun.source.util.TreeScanner.scan(TreeScanner.java:106) at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:78) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitClass(SemanticHighlighterBase.java:1124) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitClass(SemanticHighlighterBase.java:424) at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:822) at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82) at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:69) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:1199) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:424) at com.sun.source.util.TreeScanner.scan(TreeScanner.java:106) at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:78) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitCompilationUnit(SemanticHighlighterBase.java:797) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.visitCompilationUnit(SemanticHighlighterBase.java:424) at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:603) at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:82) at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:69) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase$DetectorVisitor.scan(SemanticHighlighterBase.java:1199) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase.process(SemanticHighlighterBase.java:251) at org.netbeans.modules.java.editor.semantic.SemanticHighlighter.process(SemanticHighlighter.java:56) at org.netbeans.modules.java.editor.base.semantic.SemanticHighlighterBase.run(SemanticHighlighterBase.java:118) at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:561) [catch] at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:786) at org.openide.util.lookup.Lookups.executeWith(Lookups.java:279) at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.execute(TaskProcessor.java:702) at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:663) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418) at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45) at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
A similar (in the few first 18 calls) stack trace is caused by the following code which is actually syntactically correct (but which has a type error), every time an edit is made (2020-05-02: PR submitter confirms that this case is handled by the merged PR as well.):
public class FooTest {
public void someMethod() {
List<String> someFoo = listOf(transform(null, s -> new Integer(5)));
}
public static <E> List<E> listOf(E element) {
throw new UnsupportedOperationException();
}
public static <F, T> Iterable<T> transform(
Iterable<F> fromIterable, Function<? super F, ? extends T> function)
{
throw new UnsupportedOperationException();
}
}
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