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https://issues.apache.org/jira/browse/NETBEANS-4982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17489337#comment-17489337
]
Vít Suchánek commented on NETBEANS-4982:
----------------------------------------
Hi,
I've encountered this exception also in version 13-rc3. I'm working on a Java
Maven-based web project. Since this exception occured, Java hints don't work
properly. That is they don't show relevant suggestions related to current
context, just global ones.
Kind regards
Vít
Product Version: Apache NetBeans IDE 13-rc3
Java: 11.0.14; Java HotSpot(TM) 64-Bit Server VM 11.0.14+8-LTS-263
Runtime: Java(TM) SE Runtime Environment 11.0.14+8-LTS-263
System: Windows 10 version 10.0 running on amd64; Cp1252; cs_CZ (nb)
User directory: C:\Java\NetBeans\dev\13.0
Cache directory: C:\Java\NetBeans\cache\dev\13.0
Stacktrace:
java.lang.NullPointerException
at
org.netbeans.lib.nbjavac.services.NBJavacTrees.getElement(NBJavacTrees.java:66)
at
org.netbeans.lib.nbjavac.services.NBJavacTrees.getElement(NBJavacTrees.java:40)
at
org.netbeans.modules.java.hints.jdk.mapreduce.PreconditionsChecker$VariablesVisitor.isLocalVariable(PreconditionsChecker.java:226)
at
org.netbeans.modules.java.hints.jdk.mapreduce.PreconditionsChecker$VariablesVisitor.visitIdentifier(PreconditionsChecker.java:218)
at
org.netbeans.modules.java.hints.jdk.mapreduce.PreconditionsChecker$VariablesVisitor.visitIdentifier(PreconditionsChecker.java:192)
at com.sun.tools.javac.tree.JCTree$JCIdent.accept(JCTree.java:2592)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at
com.sun.source.util.TreeScanner.visitMemberSelect(TreeScanner.java:819)
at
com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:2458)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
at
com.sun.source.util.TreeScanner.visitMethodInvocation(TreeScanner.java:589)
at
com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1813)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.visitBinary(TreeScanner.java:721)
at com.sun.tools.javac.tree.JCTree$JCBinary.accept(JCTree.java:2166)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.visitBinary(TreeScanner.java:721)
at com.sun.tools.javac.tree.JCTree$JCBinary.accept(JCTree.java:2166)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.visitBinary(TreeScanner.java:721)
at com.sun.tools.javac.tree.JCTree$JCBinary.accept(JCTree.java:2166)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
at
org.netbeans.api.java.source.support.ErrorAwareTreeScanner.visitErroneous(ErrorAwareTreeScanner.java:34)
at com.sun.tools.javac.tree.JCTree$JCErroneous.accept(JCTree.java:3268)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at
com.sun.source.util.TreeScanner.visitExpressionStatement(TreeScanner.java:502)
at
com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1592)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
at com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:272)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1103)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
at com.sun.source.util.TreeScanner.visitIf(TreeScanner.java:486)
at com.sun.tools.javac.tree.JCTree$JCIf.accept(JCTree.java:1565)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
at com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:272)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1103)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
at com.sun.source.util.TreeScanner.visitIf(TreeScanner.java:486)
at com.sun.tools.javac.tree.JCTree$JCIf.accept(JCTree.java:1565)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
at com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:272)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1103)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
at
org.netbeans.api.java.source.support.ErrorAwareTreeScanner.visitCase(ErrorAwareTreeScanner.java:41)
at com.sun.tools.javac.tree.JCTree$JCCase.accept(JCTree.java:1357)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:119)
at com.sun.source.util.TreeScanner.visitSwitch(TreeScanner.java:368)
at com.sun.tools.javac.tree.JCTree$JCSwitch.accept(JCTree.java:1304)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
at com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:272)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1103)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
at com.sun.source.util.TreeScanner.visitIf(TreeScanner.java:486)
at com.sun.tools.javac.tree.JCTree$JCIf.accept(JCTree.java:1565)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:111)
at com.sun.source.util.TreeScanner.visitBlock(TreeScanner.java:272)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1103)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:96)
at
com.sun.source.util.TreeScanner.visitEnhancedForLoop(TreeScanner.java:338)
at
com.sun.tools.javac.tree.JCTree$JCEnhancedForLoop.accept(JCTree.java:1243)
at com.sun.source.util.TreeScanner.scan(TreeScanner.java:92)
at
org.netbeans.modules.java.hints.jdk.mapreduce.PreconditionsChecker.getInnerVariables(PreconditionsChecker.java:90)
at
org.netbeans.modules.java.hints.jdk.mapreduce.PreconditionsChecker.<init>(PreconditionsChecker.java:75)
at
org.netbeans.modules.java.hints.jdk.mapreduce.ForLoopToFunctionalHint.computeWarning(ForLoopToFunctionalHint.java:54)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
[catch] at
org.netbeans.modules.java.hints.providers.code.CodeHintProviderImpl$WorkerImpl.createErrors(CodeHintProviderImpl.java:315)
at
org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.runHint(HintsInvoker.java:794)
at
org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.access$400(HintsInvoker.java:89)
at
org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.runAndAdd(HintsInvoker.java:656)
at
org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.scanDoNotGoDeeper(HintsInvoker.java:710)
at
org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeSuggestions(HintsInvoker.java:384)
at
org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:220)
at
org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:192)
at
org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:165)
at
org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:127)
at
org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:113)
at
org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:63)
at
org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper.run(JavaSourceAccessor.java:273)
at
org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:561)
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)
> Nullpointer exception:
> org.netbeans.lib.nbjavac.services.NBJavacTrees.getElement
> --------------------------------------------------------------------------------
>
> Key: NETBEANS-4982
> URL: https://issues.apache.org/jira/browse/NETBEANS-4982
> Project: NetBeans
> Issue Type: Bug
> Affects Versions: 12.1
> Environment: NB 12.1, Ubuntu 20, Java 14
> Reporter: Martin Meeser
> Priority: Minor
> Attachments: nb_ex
>
>
> Gets caught by the IDE, shown as notification.
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