Windows PowerShell (Admin) ReadLine issue on first Keystroke

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
48/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
csharp, powershell

Research direction

Reproduce the first-keystroke failure in an elevated Windows PowerShell session, then start at the PSReadLine entry points shown in the trace: Insert, ForceRender, and ReallyRender. Confirm that the initial character no longer raises System.IO.IOException and that subsequent command input still works.

Written by the indexing model from the issue text.

Description

Needs-Triage :mag:
Prerequisites
  • Write a descriptive title.
  • Make sure you are able to repro it on the latest released version
  • Search the existing issues, especially the pinned issues.
Exception report
I get this error on first keystroke to Windows PowerShell (only when run in Start Menu > Windows PowerShell > Run as administrator:

Oops, something went wrong.  Please report this bug with the details below.
Report on GitHub: https://github.com/PowerShell/PSReadLine/issues/new
### Environment
PSReadLine: 2.0.0
PowerShell: 5.1.26100.8115
OS: Microsoft Windows 10.0.26200
Last 1 Keys

 c


### Exception

System.IO.IOException: The parameter is incorrect.

   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.Console.set_CursorVisible(Boolean value)
   at Microsoft.PowerShell.PSConsoleReadLine.ReallyRender(RenderData renderData, String defaultColor)
   at Microsoft.PowerShell.PSConsoleReadLine.ForceRender()
   at Microsoft.PowerShell.PSConsoleReadLine.Insert(Char c)
   at Microsoft.PowerShell.PSConsoleReadLine.SelfInsert(Nullable`1 key, Object arg)
   at Microsoft.PowerShell.PSConsoleReadLine.ProcessOneKey(PSKeyInfo key, Dictionary`2 dispatchTable, Boolean ignoreIfNoAction, Object arg)
   at Microsoft.PowerShell.PSConsoleReadLine.InputLoop()
   at Microsoft.PowerShell.PSConsoleReadLine.ReadLine(Runspace runspace, EngineIntrinsics engineIntrinsics, CancellationToken cancellationToken)
Screenshot

<img width="586" height="307" alt="Image" src="https://github.com/user-attachments/assets/d35bc21a-15ca-4ce5-b429-406493e2f

Image

28b" />

Environment data
PS Version: 5.1.26100.8115
PS HostName: ConsoleHost
PSReadLine Version: 2.0.0
PSReadLine EditMode: Windows
OS: 10.0.26100.1 (WinBuild.160101.0800)
BufferWidth: 120
BufferHeight: 8000
Steps to reproduce

Any first keystroke throws the exception and causes error, but you can run commands after in the same failed ps readline. Only happens on the first key.

Expected behavior

Should not throw exception.

Actual behavior

Throws exception upon typing.

Dominant language
C#
Stars
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Forks
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PR merge metrics
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