The Terminal loses lines of history

[TishSerg]

Windows Terminal version (or Windows build number)

1.9.1942.0 (@ Microsoft Windows [Version 10.0.19043.1165])

Other Software

No response

Steps to reproduce

Finally, I caught a simple reproducible manifestation of this annoying bug, and finally, I'm opening this issue here. That freaks me out for a long time.

1. Open new Windows PowerShell tab
2. Enter command: wsl --help
3. Copy all the text to one of the sides of your favorite diff application
4. Enter command: wsl --list
5. Enter command: wsl --list --verbose
6. Copy the same text to another side of your favorite diff application
7. See the Terminal have lost a couple of lines

I did some investigation for you, msft guys. Here are some discovered facts:

• The lost lines are the same every time if the Terminal viewport has the same height.
  If you change viewport height, then a different couple of lines will be lost (but still with 2 preserved lines between them). Example for viewport of ~35 lines height (maybe ±few, I counted manually):
  

• After reading this post I decided to test if the Legacy Command-line tab has the same issue. So: it doesn't. The legacy cmd tab works as expected.

• How about an Ubuntu tab? The same as the Legacy cmd tab. Doesn't lose lines.

Further investigation is yours, msft guys. Have nice bug hunting ;)

P.S. Looks like after these discoveries I going to use the Legacy Command-line tab more ¯_(ツ)_/¯

Expected Behavior

The scrollback doesn't lose random lines of text

Actual Behavior

Some lines are lost from scrollback buffer history

[DHowett]

Thanks for the report! This sounds suspiciously similar to /dup PowerShell/PSReadLine#724

The old version of PSReadline that came with Windows PowerShell uses a "hard scroll" operation when the prompt is displayed. This "hard scroll" deletes the content that was scrolled off the screen.

If you can update PSReadline -- or perhaps even better -- upgrade to PowerShell 7, this issue should be thoroughly defeated. 😄

[ghost]

Hi! We've identified this issue as a duplicate of one that exists on somebody else's Issue Tracker. Please make sure you subscribe to the referenced external issue for future updates. Thanks for your report!

[TishSerg]

update PSReadline

How to do that?

PSReadline version: 2.0.0-beta2
os: 10.0.19041.1 (WinBuild.160101.0800)
PS file version: 10.0.19041.1 (WinBuild.160101.0800)
HostName: ConsoleHost (Windows Terminal)
BufferWidth: 148
BufferHeight: 35

[zadjii-msft]

How to update psreadline

[TishSerg]

How to update psreadline

Thank you