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Posted to commits@netbeans.apache.org by "Arunava Sinha (Jira)" <ji...@apache.org> on 2020/04/17 06:34:00 UTC
[jira] [Commented] (NETBEANS-4095) NPE saving Java file with type
error in for-each
[ https://issues.apache.org/jira/browse/NETBEANS-4095?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17085472#comment-17085472 ]
Arunava Sinha commented on NETBEANS-4095:
-----------------------------------------
Issue is reproducible, will work on the resolution
> NPE saving Java file with type error in for-each
> ------------------------------------------------
>
> Key: NETBEANS-4095
> URL: https://issues.apache.org/jira/browse/NETBEANS-4095
> Project: NetBeans
> Issue Type: Bug
> Components: java - Source
> Affects Versions: 11.3
> Environment: Java 14, NetBeans with nbjavac plugin installed
> Reporter: Eirik Bakke
> Assignee: Arunava Sinha
> Priority: Major
> Labels: nbjavac
>
> If, during editing, a for-each loop appears with an incorrect pair of types, an error dialog shows up showing a NullPointerException every time the Java source file is saved, interrupting the user. A minimized example exhibiting this behavior is as follows:
> {code:java}
> public final class CausesVisitIterableForeachLoopNPE {
> public static final void main(String args[]) {
> final Map<String,Object> someMap = null;
> for (Object someVar : someMap) { }
> }
> }
> {code}
> This example causes the IDE to throw the following exception:
> {noformat}
> java.lang.NullPointerException
> at com.sun.tools.javac.comp.Lower.visitIterableForeachLoop(Lower.java:3275)
> at com.sun.tools.javac.comp.Lower.visitForeachLoop(Lower.java:3162)
> at com.sun.tools.javac.tree.JCTree$JCEnhancedForLoop.accept(JCTree.java:1176)
> at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
> at com.sun.tools.javac.comp.Lower.translate(Lower.java:2080)
> at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
> at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:167)
> at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3347)
> at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1036)
> at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
> at com.sun.tools.javac.comp.Lower.translate(Lower.java:2080)
> at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:150)
> at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2538)
> at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2448)
> at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:882)
> at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
> at com.sun.tools.javac.comp.Lower.translate(Lower.java:2080)
> at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2219)
> at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:788)
> at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
> at com.sun.tools.javac.comp.Lower.translate(Lower.java:2080)
> at com.sun.tools.javac.comp.Lower.translate(Lower.java:2099)
> at com.sun.tools.javac.comp.Lower.translateTopLevelClass(Lower.java:3813)
> at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1691)
> at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1532)
> at com.sun.tools.javac.api.JavacTaskImpl$2.process(JavacTaskImpl.java:574)
> at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:651)
> at com.sun.tools.javac.api.JavacTaskImpl.generate(JavacTaskImpl.java:577)
> [catch] at org.netbeans.modules.java.source.nbjavac.indexing.MultiPassCompileWorker.compile(MultiPassCompileWorker.java:303)
> at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:361)
> at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:138)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:275)
> at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:136)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2750)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$800(RepositoryUpdater.java:2154)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2636)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2634)
> at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:540)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:2634)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.call(RepositoryUpdater.java:3300)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.call(RepositoryUpdater.java:3255)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$4.run(RepositoryUpdater.java:2127)
> at org.openide.util.lookup.Lookups.executeWith(Lookups.java:279)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runInContext(RepositoryUpdater.java:2123)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runInContext(RepositoryUpdater.java:2104)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.access$1500(RepositoryUpdater.java:136)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:3255)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:3785)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:3420)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:6183)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4300(RepositoryUpdater.java:5834)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2$1.run(RepositoryUpdater.java:6099)
> at org.openide.util.lookup.Lookups.executeWith(Lookups.java:279)
> at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:83)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:6095)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:6091)
> at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:153)
> at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:335)
> at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:118)
> at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:67)
> at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:6091)
> 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)
> {noformat}
> The problem occurs whether Compile-or-Save is enabled or not. Tested in a Maven Java project on Java 14.
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