Internal error: NegativeArraySizeException

[dradtke]

I just received this error when doing some work:

SEVERE: Internal error: java.lang.NegativeArraySizeException
java.util.concurrent.CompletionException: java.lang.NegativeArraySizeException
        at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
        at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
        at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:604)
        at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
        at java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:443)
        at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
        at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
        at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
        at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
Caused by: java.lang.NegativeArraySizeException
        at org.eclipse.jdt.internal.compiler.util.HashtableOfObject.<init>(HashtableOfObject.java:41)
        at org.eclipse.jdt.internal.core.index.DiskIndex.readCategoryTable(DiskIndex.java:683)
        at org.eclipse.jdt.internal.core.index.DiskIndex.addQueryResults(DiskIndex.java:204)
        at org.eclipse.jdt.internal.core.index.Index.query(Index.java:147)
        at org.eclipse.jdt.internal.core.search.matching.MultiTypeDeclarationPattern.queryIn(MultiTypeDeclarationPattern.java:150)
        at org.eclipse.jdt.core.search.SearchPattern.findIndexMatches(SearchPattern.java:2414)
        at org.eclipse.jdt.internal.core.search.matching.MatchLocator.findIndexMatches(MatchLocator.java:296)
        at org.eclipse.jdt.internal.core.search.PatternSearchJob.search(PatternSearchJob.java:117)
        at org.eclipse.jdt.internal.core.search.PatternSearchJob.execute(PatternSearchJob.java:72)
        at org.eclipse.jdt.internal.core.search.processing.JobManager.performConcurrentJob(JobManager.java:265)
        at org.eclipse.jdt.internal.core.search.BasicSearchEngine.searchAllTypeNames(BasicSearchEngine.java:2101)
        at org.eclipse.jdt.core.search.SearchEngine.searchAllTypeNames(SearchEngine.java:1299)
        at org.eclipse.jdt.core.manipulation.OrganizeImportsOperation$TypeReferenceProcessor.process(OrganizeImportsOperation.java:361)
        at org.eclipse.jdt.core.manipulation.OrganizeImportsOperation.createTextEdit(OrganizeImportsOperation.java:595)
        at org.eclipse.jdt.ls.core.internal.text.correction.SourceAssistProcessor.getOrganizeImportsProposal(SourceAssistProcessor.java:203)                                                                                                                                 
        at org.eclipse.jdt.ls.core.internal.text.correction.SourceAssistProcessor.getSourceActionCommands(SourceAssistProcessor.java:116)                                                                                                                                    
        at org.eclipse.jdt.ls.core.internal.handlers.CodeActionHandler.getCodeActionCommands(CodeActionHandler.java:164)
        at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$14(JDTLanguageServer.java:638)
        at org.eclipse.jdt.ls.core.internal.BaseJDTLanguageServer.lambda$0(BaseJDTLanguageServer.java:75)
        at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
        ... 6 more

I believe I was trying to access code actions in order to import a class, but unfortunately this isn't reliably reproducible.

[fbricon]

Can you please enable verbose tracing and attach the output logs?

[dradtke]

I'm using Vim, but I'll try to turn on verbose tracing and grab any resulting logs if I run into the issue again.