No diagnostics, but org.eclipse.jface.text.BadLocationException

No compile errors showing in the editor...

Environment

• Java dev container: https://github.com/microsoft/vscode-dev-containers/blob/6c963f93705796aef2166502a2030866987e5a4f/containers/java-12/.devcontainer/Dockerfile
• Visual Studio Code version: 1.42.0-insider
• Java extension pack: 0.8.1

Steps To Reproduce

1. Open Java-file, write semantic errors, like adding a bad reference
2. Save

Current Result

No compile errors, console show exceptions

[Error - 11:16:47 AM] Jan 3, 2020, 11:16:47 AM 
null
org.eclipse.jface.text.BadLocationException
	at org.eclipse.jface.text.ListLineTracker.getLineOffset(ListLineTracker.java:197)
	at org.eclipse.jface.text.AbstractLineTracker.getLineOffset(AbstractLineTracker.java:161)
	at org.eclipse.jface.text.AbstractDocument.getLineOffset(AbstractDocument.java:876)
	at org.eclipse.core.internal.filebuffers.SynchronizableDocument.getLineOffset(SynchronizableDocument.java:323)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.convertRange(WorkspaceDiagnosticsHandler.java:371)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.toDiagnostic(WorkspaceDiagnosticsHandler.java:348)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.lambda$3(WorkspaceDiagnosticsHandler.java:332)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.toDiagnosticsArray(WorkspaceDiagnosticsHandler.java:334)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.visit(WorkspaceDiagnosticsHandler.java:171)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:67)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:51)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.resourceChanged(WorkspaceDiagnosticsHandler.java:95)
	at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:305)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:295)
	at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:158)
	at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:380)
	at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1502)
	at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:169)
	at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:244)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

[Error - 11:17:05 AM] Jan 3, 2020, 11:17:05 AM 
null
org.eclipse.jface.text.BadLocationException
	at org.eclipse.jface.text.ListLineTracker.getLineOffset(ListLineTracker.java:197)
	at org.eclipse.jface.text.AbstractLineTracker.getLineOffset(AbstractLineTracker.java:161)
	at org.eclipse.jface.text.AbstractDocument.getLineOffset(AbstractDocument.java:876)
	at org.eclipse.core.internal.filebuffers.SynchronizableDocument.getLineOffset(SynchronizableDocument.java:323)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.convertRange(WorkspaceDiagnosticsHandler.java:371)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.toDiagnostic(WorkspaceDiagnosticsHandler.java:348)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.lambda$3(WorkspaceDiagnosticsHandler.java:332)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.toDiagnosticsArray(WorkspaceDiagnosticsHandler.java:334)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.visit(WorkspaceDiagnosticsHandler.java:171)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:67)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:77)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:51)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.resourceChanged(WorkspaceDiagnosticsHandler.java:95)
	at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:305)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:295)
	at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:158)
	at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:380)
	at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1502)
	at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:169)
	at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:244)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

スタックトレースで名前が挙げられている WorkspaceDiagnosticsHandler.java、特に convertRange と toDiagnostic から始めます。記載されている VS Code と Java extension の環境で Java ファイルのセマンティックエラーのシナリオを再現し、その後、なぜ BadLocationException によって診断が表示されなくなるのかを追跡します。セマンティックエラーが例外なしで表示されれば完了です。