[
https://issues.apache.org/jira/browse/NETBEANS-885?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Eirik Bakke updated NETBEANS-885:
---------------------------------
Labels: nbjavac (was: )
> NPE on invalid Java source code
> -------------------------------
>
> Key: NETBEANS-885
> URL: https://issues.apache.org/jira/browse/NETBEANS-885
> Project: NetBeans
> Issue Type: Bug
> Components: java - Editor
> Affects Versions: 9.0
> Environment: Linux, NetBeans 9.0 RC1 (and predecessors).
> Reporter: Peter Nabbefeld
> Assignee: Jan Lahoda
> Priority: Critical
> Labels: nbjavac
>
> I sometimes like to write some code using hints for completion like this:
> package test;
> import java.io.File;
> public class Test {
> public void test() {
> File[] files = new File[0];
> for (file : files)
> }
> }
> This results in NullPointerExceptions on editing, formatting, or even just
> re-opening the file.
> Additionally to bug resolution I'd like to know how to write tests for such
> situations, so I'd be glad if You could append a diff for the changes.
> Relevant part of stacktrace:
> java.lang.NullPointerException
> SEVERE [org.openide.util.Exceptions]
> java.lang.NullPointerException
> at
> jdk.compiler/com.sun.tools.javac.tree.Pretty.visitVarDef(Pretty.java:636)
> at
> jdk.compiler/com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:950)
> at jdk.compiler/com.sun.tools.javac.tree.Pretty.printExpr(Pretty.java:194)
> at jdk.compiler/com.sun.tools.javac.tree.Pretty.printExpr(Pretty.java:209)
> at jdk.compiler/com.sun.tools.javac.tree.JCTree.toString(JCTree.java:429)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl.createBreadcrumbs(BreadCrumbsNodeImpl.java:260)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.scan(BreadCrumbsNodeImpl.java:535)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.scan(BreadCrumbsNodeImpl.java:514)
> at
> jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:90)
> at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:105)
> at
> jdk.compiler/com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:248)
> at
> jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1026)
> at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:86)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.scan(BreadCrumbsNodeImpl.java:539)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.visitMethod(BreadCrumbsNodeImpl.java:544)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.visitMethod(BreadCrumbsNodeImpl.java:514)
> at
> jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:898)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3.run(BreadCrumbsNodeImpl.java:514)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3.run(BreadCrumbsNodeImpl.java:503)
> at
> org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:501)
> at
> org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:586)
> at
> org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:130)
> at
> org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:114)
> at
> org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:181)
> at
> org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:178)
> at
> org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:153)
> at
> org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:335)
> at
> org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:118)
> at
> org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:67)
> at
> org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:178)
> at
> org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:81)
> at
> org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:451)
> at
> org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:422)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl.getChildren(BreadCrumbsNodeImpl.java:503)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsScanningTask.rootAndSelection(BreadCrumbsScanningTask.java:114)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsScanningTask.run(BreadCrumbsScanningTask.java:82)
> at
> org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:561)
> [catch] at
> org.netbeans.modules.parsing.impl.TaskProcessor$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$RunnableAdapter.call(Executors.java:514)
> at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
> at org.openide.util.RequestProcessor$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$Processor.run(RequestProcessor.java:2033)
> SEVERE [org.openide.util.Exceptions]
> java.lang.NullPointerException
> SEVERE [null]: Last record repeated again.
> SEVERE [org.openide.util.Exceptions]
> java.lang.NullPointerException
> at
> jdk.compiler/com.sun.tools.javac.tree.Pretty.visitVarDef(Pretty.java:636)
> at
> jdk.compiler/com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:950)
> at jdk.compiler/com.sun.tools.javac.tree.Pretty.printExpr(Pretty.java:194)
> at jdk.compiler/com.sun.tools.javac.tree.Pretty.printExpr(Pretty.java:209)
> at jdk.compiler/com.sun.tools.javac.tree.JCTree.toString(JCTree.java:429)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl.createBreadcrumbs(BreadCrumbsNodeImpl.java:260)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.scan(BreadCrumbsNodeImpl.java:535)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.scan(BreadCrumbsNodeImpl.java:514)
> at
> jdk.compiler/com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:90)
> at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:105)
> at
> jdk.compiler/com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:248)
> at
> jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1026)
> at jdk.compiler/com.sun.source.util.TreeScanner.scan(TreeScanner.java:86)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.scan(BreadCrumbsNodeImpl.java:539)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.visitMethod(BreadCrumbsNodeImpl.java:544)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3$1.visitMethod(BreadCrumbsNodeImpl.java:514)
> at
> jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:898)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3.run(BreadCrumbsNodeImpl.java:514)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl$3.run(BreadCrumbsNodeImpl.java:503)
> at
> org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:501)
> at
> org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:586)
> at
> org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:130)
> at
> org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:114)
> at
> org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:181)
> at
> org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:178)
> at
> org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:153)
> at
> org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:335)
> at
> org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:118)
> at
> org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:67)
> at
> org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:178)
> at
> org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:81)
> at
> org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:451)
> at
> org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:422)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsNodeImpl.getChildren(BreadCrumbsNodeImpl.java:503)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsScanningTask.rootAndSelection(BreadCrumbsScanningTask.java:114)
> at
> org.netbeans.modules.java.navigation.BreadCrumbsScanningTask.run(BreadCrumbsScanningTask.java:82)
> at
> org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:561)
> [catch] at
> org.netbeans.modules.parsing.impl.TaskProcessor$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$RunnableAdapter.call(Executors.java:514)
> at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
> at org.openide.util.RequestProcessor$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)
> SEVERE [org.openide.util.Exceptions]
> java.lang.NullPointerException
> SEVERE [null]: Last record repeated again.
> SEVERE [org.openide.util.RequestProcessor]: Error in RequestProcessor
> org.netbeans.modules.java.editor.imports.ClipboardHandler$7
> java.lang.NullPointerException
> Caused: org.openide.util.RequestProcessor$FastItem: task failed due to
> WARNING [org.netbeans.modules.versioning.util.Utils]: associateEncoding() no
> file object available for
> /tmp/vcs-1527659156240/vcs-1527660513965/testGenerate123456789.pass
> INFO [org.netbeans.modules.parsing.impl.TaskProcessor]: Task:
> CancelableTaskWrapper[task:
> org.netbeans.modules.java.hints.spiimpl.hints.HintsTask@5cf81cb0, phase:
> RESOLVED, priority: 500] : class
> org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper
> ignored cancel for 99 ms.
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$1 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$2 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$3 ]
> WARNING [org.openide.util.WeakListenerImpl]: Can't remove
> java.beans.PropertyChangeListener using method
> org.netbeans.modules.editor.NbEditorDocument.removePropertyChangeListener
> from org.netbeans.modules.editor.NbEditorDocument@7b5f8694,
> mimeType='text/plain', kitClass=null, length=343, version=1,
> file=org.openide.loaders.DefaultDataObject@3c3c4426[/home/peter/incubator-netbeans/java.editor/test/unit/data/goldenfiles/org/netbeans/modules/java/editor/codegen/DelegateMethodGeneratorTest/1.8/testGenerate133625d.pass@583f1c3d:20e7cfa5]
> INFO [org.netbeans.modules.parsing.impl.TaskProcessor]: Task:
> CancelableTaskWrapper[task:
> org.netbeans.modules.java.hints.spiimpl.hints.HintsTask@319ddcff, phase:
> RESOLVED, priority: 500] : class
> org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper
> ignored cancel for 123 ms.
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$1 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$2 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$3 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$1 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$2 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$3 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$1 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$2 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$3 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$1 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$2 ]
> INFO [org.netbeans.api.java.source.ElementHandle]: Resolved type is null for
> kind = CLASS
> INFO [org.netbeans.api.java.source.ElementHandle]: Cannot resolve:
> ElementHandle[kind=CLASS;
> sigs=org.netbeans.modules.java.editor.codegen.DelegateMethodGeneratorTest$3 ]
> SEVERE [org.openide.util.Exceptions]
> java.lang.NullPointerException
> SEVERE [null]: Last record repeated again.
> WARNING [org.netbeans.modules.java.source.tasklist.IncorrectErrorBadges]:
> Incorrect error badges detected,
> file=/home/peter/NetBeansProjects/SampleExporter/src/main/java/org/example/ds/Test.java.
> WARNING [org.netbeans.modules.java.source.tasklist.IncorrectErrorBadges]:
> Going to recompute
> root=/home/peter/NetBeansProjects/SampleExporter/src/main/java, files in
> error=[].
> WARNING [org.netbeans.modules.java.source.indexing.JavaIndex]:
> VanillaCompileWorker caused an exception
> Root: /home/peter/NetBeansProjects/SampleExporter/src/main/java
>
> As You can see, not every NPE presents a stacktrace.
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