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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Java 14, NetBeans with nbjavac plugin installed
Description
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:
public final class CausesVisitIterableForeachLoopNPE { public static final void main(String args[]) { final Map<String,Object> someMap = null; for (Object someVar : someMap) { } } }
This example causes the IDE to throw the following exception:
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)
The problem occurs whether Compile-or-Save is enabled or not. Tested in a Maven Java project on Java 14.
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