`NullReferenceException` in `GetDiagnosticFromMarker`

[dkattan]

Prerequisites

• Write a descriptive title.
• Make sure you are able to repro it on the latest version
• Search the existing issues.

Steps to reproduce

I am experiencing an intermittent NullReferenceException in AnalysisService.cs

PowerShellEditorServices/src/PowerShellEditorServices/Services/Analysis/AnalysisService.cs

Line 423 in ba293c9

Severity = MapDiagnosticSeverity(scriptFileMarker.Level),

I don't know how to reproduce it, but it appears to be simple to fix.

Expected behavior

NullReferenceException should not happen

Actual behavior

NullReferenceException happens

Error details

System.NullReferenceException
  HResult=0x80004003
  Message=Object reference not set to an instance of an object.
  Source=Microsoft.PowerShell.EditorServices
  StackTrace:
   at Microsoft.PowerShell.EditorServices.Services.AnalysisService.GetDiagnosticFromMarker(ScriptFileMarker scriptFileMarker) in C:\Users\DKattan.IN\source\repos\PowerShellEditorServices\src\PowerShellEditorServices\Services\Analysis\AnalysisService.cs:line 421
   at Microsoft.PowerShell.EditorServices.Services.AnalysisService.PublishScriptDiagnostics(ScriptFile scriptFile, IReadOnlyList`1 markers) in C:\Users\DKattan.IN\source\repos\PowerShellEditorServices\src\PowerShellEditorServices\Services\Analysis\AnalysisService.cs:line 401
   at Microsoft.PowerShell.EditorServices.Services.AnalysisService.PublishScriptDiagnostics(ScriptFile scriptFile) in C:\Users\DKattan.IN\source\repos\PowerShellEditorServices\src\PowerShellEditorServices\Services\Analysis\AnalysisService.cs:line 385
   at Microsoft.PowerShell.EditorServices.Services.AnalysisService.<DelayThenInvokeDiagnosticsAsync>d__28.MoveNext() in C:\Users\DKattan.IN\source\repos\PowerShellEditorServices\src\PowerShellEditorServices\Services\Analysis\AnalysisService.cs:line 381
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at Microsoft.PowerShell.EditorServices.Services.AnalysisService.<GetMostRecentCodeActionsForFileAsync>d__19.MoveNext() in C:\Users\DKattan.IN\source\repos\PowerShellEditorServices\src\PowerShellEditorServices\Services\Analysis\AnalysisService.cs:line 228

  This exception was originally thrown at this call stack:
    Microsoft.PowerShell.EditorServices.Services.AnalysisService.GetDiagnosticFromMarker(Microsoft.PowerShell.EditorServices.Services.TextDocument.ScriptFileMarker) in AnalysisService.cs
    Microsoft.PowerShell.EditorServices.Services.AnalysisService.PublishScriptDiagnostics(Microsoft.PowerShell.EditorServices.Services.TextDocument.ScriptFile, System.Collections.Generic.IReadOnlyList<Microsoft.PowerShell.EditorServices.Services.TextDocument.ScriptFileMarker>) in AnalysisService.cs
    Microsoft.PowerShell.EditorServices.Services.AnalysisService.PublishScriptDiagnostics(Microsoft.PowerShell.EditorServices.Services.TextDocument.ScriptFile) in AnalysisService.cs
    Microsoft.PowerShell.EditorServices.Services.AnalysisService.DelayThenInvokeDiagnosticsAsync(Microsoft.PowerShell.EditorServices.Services.TextDocument.ScriptFile[], System.Threading.CancellationToken) in AnalysisService.cs
    [External Code]
    Microsoft.PowerShell.EditorServices.Services.AnalysisService.GetMostRecentCodeActionsForFileAsync(OmniSharp.Extensions.LanguageServer.Protocol.DocumentUri) in AnalysisService.cs

Environment data

PowerShell 7.1.3 PSES 3.5.0

Version

3.5.0

Visuals

[andyleejordan]

Ah, good find @dkattan. Don't have to time to get this into the next release, but triaged!