Code Lens References Keep Turning On and Off?

[MatthewMcConnell]

Environment

• Operating System: Windows 10
• JDK version: 1.8
• Visual Studio Code version: 1.14.2

Been having problems with the code lens as when I am typing more code I am seeing the references pop away and back again, making the code move as a whole up and down which is quite annoying to see when typing.

Recently I got this error in the output:

[Error - 13:21:58] 07-Aug-2017 13:19:39 Problem resolving code lens
Index out of bounds
Java Model Exception: Java Model Status [Index out of bounds]
at org.eclipse.jdt.internal.core.Openable.codeSelect(Openable.java:158)
at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect(CompilationUnit.java:377)
at org.eclipse.jdt.internal.core.CompilationUnit.codeSelect(CompilationUnit.java:371)
at org.eclipse.jdt.ls.core.internal.JDTUtils.findElementsAtSelection(JDTUtils.java:444)
at org.eclipse.jdt.ls.core.internal.JDTUtils.findElementAtSelection(JDTUtils.java:431)
at org.eclipse.jdt.ls.core.internal.handlers.CodeLensHandler.resolve(CodeLensHandler.java:76)
at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$12(JDTLanguageServer.java:352)
at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
at java.util.concurrent.CompletableFuture$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)

[fbricon]

Yeah code lenses are recomputed every time the document changes, it's not ideal.

You can disable codeLenses in the preferences either via
"editor.codeLens": false //disables all code lenses at the editor level
or
"java.referencesCodeLens.enabled": false //only disables java reference code lenses
"java.implementationsCodeLens.enabled": false //only disable java implementation code lenses

As for the Index Out of Bound exception, I see it occasionally too, I assume there's a race condition between updating the compilation unit during typing and recomputing code lenses. I think this should be handled in a separate ticket

[aeschli]

The bug was in VSCode: microsoft/vscode#32877. The fix will be in the August release.

[fbricon]

Until the next version of vscode is released, you can try the latest insiders build.