Autocompletion doesn't work well within lambda expressions

Issue Type: Bug

[Error - 7:12:19 PM] Feb 17, 2022, 7:12:19 PM Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".

java.lang.IllegalArgumentException:
at org.eclipse.core.runtime.Assert.isLegal(Assert.java:66)
at org.eclipse.core.runtime.Assert.isLegal(Assert.java:50)
at org.eclipse.core.internal.jobs.JobManager.setRule(JobManager.java:1400)
at org.eclipse.core.internal.jobs.InternalJob.setRule(InternalJob.java:486)
at org.eclipse.core.runtime.jobs.Job.setRule(Job.java:771)
at org.eclipse.jdt.ls.core.internal.handlers.BaseDocumentLifeCycleHandler.triggerValidation(BaseDocumentLifeCycleHandler.java:154)
at org.eclipse.jdt.ls.core.internal.handlers.BaseDocumentLifeCycleHandler.triggerValidation(BaseDocumentLifeCycleHandler.java:138)
at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.visit(WorkspaceDiagnosticsHandler.java:180)
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:77)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:51)
at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceDiagnosticsHandler.resourceChanged(WorkspaceDiagnosticsHandler.java:103)
at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:305)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:295)
at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:158)
at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:381)
at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1503)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2327)
at org.eclipse.core.internal.events.NotificationManager$NotifyJob.run(NotificationManager.java:44)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

Extension version: 1.3.0
VS Code version: Code 1.64.2 (f80445acd5a3dadef24aa209168452a3d97cc326, 2022-02-09T22:02:28.252Z)
OS version: Windows_NT x64 10.0.19042
Restricted Mode: No

まずラムダ式内での Java の自動補完を再現し、その後、BaseDocumentLifeCycleHandler と WorkspaceDiagnosticsHandler を通る報告されたパスを調査します。検証中に報告された IllegalArgumentException が発生せず、ラムダコンテキストで補完が機能すれば完了です。