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'MODE CON LINES=100' kills command prompt #4062
Description
Environment
Windows build number: Microsoft Windows [Version 10.0.18363.535]
Windows Terminal version (if applicable): 0.7.3451.0
Steps to reproduce
Open command prompt ('CMD'), and type 'MODE CON LINES=100'
Expected behavior
The screen is cleared, and prompt is shown at upper left corner.
Actual behavior
No prompt is show (at least characters of prompt are invisible).
Reacted by Michael Kitzan
Activity
DHowett-MSFT commentedon Dec 31, 2019
This may have been fixed (incidentally) at the same time as #3907; somebody will need to validate.
zadjii-msft commentedon Jan 2, 2020
Dustin L. Howett (MSFT) (@DHowett-MSFT) unfortunately, that's not the case :/
I think this might have to do with the screen attributes somehow. This doesn't repro with my usual prompt, but if I
set PROMPT=$p$g, then this always repros. Evenset PROMPT=$e[31m$p$g$e[39mwill cause this to go away, so there's something wonky with the attributes happening here.EDIT: oh no it's worse than that.
It will sometimes repro with my usual prompt. And sometimes it doesn't.
OH NO
I bet it actually does resize the conpty buffer. If you do this in inception (wsl.exe cmd.exe), the console will get bigger. But the Terminal doesn't act on that resize for whatever reason. Either the terminal isn't acting on the
^[[8<rows>;<cols>tsequence, or the resize is never being emitted by conpty. Probably running into that sameifclause where we check the maximum possible size of the window, but we don't do that in conpty mode.