[Bug]: Backpace adds spaces for ssh session from Alacritty

[DusanLesan]

Problem description

After I ssh into the environment run by Termux, I see backspace key adding spaces instead of removing text. The problem is only visual since the text is correct after pressing enter. I have tried this on st and Alacritty and only Alacrity is causing this problem. The issue like this used to exist for termite and maybe the solution can be similar. Exporting TERM to be vt100 fixes the issue temporarily.

What steps will reproduce the bug?

• SSH into the device running Termux
• Enter any command
• Press backspace key

What is the expected behavior?

The backspace should do as backspace does

System information

termux-info:

Packages CPU architecture:
aarch64
Subscribed repositories:
# sources.list
deb https://main.termux-mirror.ml/ stable main
# game-repo (sources.list.d/game.list)
deb https://dl.bintray.com/grimler/game-packages-24 games stable
# science-repo (sources.list.d/science.list)
deb https://dl.bintray.com/grimler/science-packages-24 science stable
Updatable packages:
All packages up to date
Android version:
11
Kernel build information:
Linux localhost 4.9.276-perf-gd8994453fb6b #1 SMP PREEMPT Sat Aug 7 02:41:36 UTC 2021 aarch64 Android
Device manufacturer:
Xiaomi
Device model:
POCO F1

[suhan-paradkar]

Looks like a problem with registering (im)proper keycodes, what do you think @xeffyr ??

[DusanLesan]

Well the issue was with either my shell or apk source. I was not aware of play store thing. Got it from fdroid now and it is ok. Closing the issue

[DusanLesan]

Spoke too soon. Sorry for this. It did work but stopped after exit and ssh again

[Grimler91]

Could you try running infocmp > alacritty.terminfo in alacritty, scp the file to termux, and then run tic -x alacritty.terminfo in termux? After that restart the shell and it hopefully works.

If it works, please share the alacritty.terminfo file here so that we can add it to ncurses

[ghost]

Compiling https://github.com/alacritty/alacritty/blob/master/extra/alacritty.info (terminfo) should be sufficient.