Control+C and Control+D stop working after closed SSH session with neovim running

[gcoremans]

Fish version: 3.7.1
Terminal: alacritty 0.14.0 (22a44757)
Operating system: Linux valentine 6.12.8-arch1-1 #1 SMP PREEMPT_DYNAMIC Thu, 02 Jan 2025 22:52:26 +0000 x86_64 GNU/Linux
SSH version: OpenSSH_9.9p1

Hi, I was editing a file in neovim over SSH on a machine, when I rebooted that machine from another terminal, abruptly closing the SSH session.

This resulted in me being unable to use Control+D to close that terminal or Control+C to clear the line. Here is the output I got:

It seems I can consistently reproduce this behavior by doing exactly this (open nvim on remote machine, reboot remote machine on a different terminal, control characters are broken in fish on the local machine). Works with my personal fish config disabled, and I believe it works with a vanilla nvim and bash on the remote machine as well.

[krobelus]

this is fixed in version 4.

It's reproducible by running printf '\x1b[=5u'.
If you hit this inside fish <4 or bash/zsh, work around it by running printf '\x1b[=0u', for example
function reset_kitty_flags --on-event fish_prompt; printf '\x1b[=0u'; end