System.ArgumentOutOfRangeException PSReadLine: 2.1.0-beta1 PowerShell: 7.1.0-preview.2

Environment

Name	Value
PS version	7.1.0-preview.2
PSReadline version	2.1.0-beta1
os	10.0.19613.1000 (WinBuild.160101.0800)
PS file version	7.1.0.0
HostName	ConsoleHost
BufferWidth	127
BufferHeight	1000

Last 200 Keys

 I n A r c h i v e F o r m a t ] : : X Z ) Ctrl+LeftArrow Ctrl+LeftArrow Ctrl+LeftArrow LeftArrow LeftArrow Shift+Ctrl+LeftArrow $ r . C o n t e n t Ctrl+z Escape # Backspace $ s RightArrow Spacebar RightArrow LeftArrow RightArrow Shift+Ctrl+LeftArrow Shift+Ctrl+LeftArrow Ctrl+RightArrow Ctrl+RightArrow RightArrow Spacebar LeftArrow LeftArrow Ctrl+LeftArrow Ctrl+LeftArrow Ctrl+LeftArrow Ctrl+LeftArrow Ctrl+LeftArrow Ctrl+LeftArrow LeftArrow Shift+LeftArrow Shift+LeftArrow Shift+LeftArrow Shift+LeftArrow Shift+LeftArrow Shift+LeftArrow Shift+LeftArrow Delete Delete Enter
 $ s e v Tab Enter
 UpArrow UpArrow Ctrl+a Ctrl+x N e w - O b j e c t Spacebar - T y p e N a m e Spacebar S e v e n Z i p E x t r a c t o r Spacebar - A r g u m e n t L i s t Spacebar @ ( $ s e v e n Z i p S t r e a m , [ S e v e n Z i p . I n A r c h i v e F o r m a t ] : : X Z ) Ctrl+LeftArrow Ctrl+LeftArrow Ctrl+LeftArrow Ctrl+LeftArrow Ctrl+RightArrow LeftArrow LeftArrow Ctrl+LeftArrow Ctrl+LeftArrow Ctrl+RightArrow [ ] Backspace Backspace Escape

Exception

System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'length')
   at System.Text.StringBuilder.Remove(Int32 startIndex, Int32 length)
   at Microsoft.PowerShell.PSConsoleReadLine.EditItemInsertChar.Undo()
   at Microsoft.PowerShell.PSConsoleReadLine.RevertLine(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)

Steps to reproduce

Investigating…

Expected behavior

Actual behavior

[daxian-dbw]

I found the issue and also the consistent repro:

1. in Windows edit mode, run Set-PSReadLineKeyHandler -Chord "Ctrl+f" -Function ForwardWord
2. Type git checkout -b blah origin/nonexist and press <kbd>Enter</kbd>
3. Type git ch, and press <kbd>Ctrl+f</kbd>, then press <kbd>Enter</kbd>
4. Press <kbd>UpArrow</kbd>, then press <kbd>Escape</kbd>

The issue will be fixed in #1496 (the 2nd commit).

[daxian-dbw]

From @jhoneill

Another one here. Identical stack trace displayed to @daniel0x00 above. It seems to be be fairly common and easy to repro in VS Code integrated shell

Put in a long line at the last line in the window, press [ESC] and POW! Something seems to do its sums wrongly and think it should be removing stuff from a line after the end of the window. If I move the cursor to left of about 176 (even if the line is very long) all is OK. If I’m not on the last line, all is OK. but cursor to near the bottom right is what triggers it . Whilst very ugly it doesn’t do any real harm apart from displaying the error the session seems unaffected

PS version: 7.0.0
PSReadline version: 2.1.0-beta1'; ProjectUri = 'https://github.com/PowerShell/PSReadLine
os: 10.0.18362.1 (WinBuild.160101.0800)
PS file version: 7.0.0.0
HostName: Visual Studio Code Host
BufferWidth: 220
BufferHeight: 32