Starting Nvim crashes tmux about neovim

[joshuali925]

tmux-logs.tar.gz

Also if i start tmux on Mac, then ssh and run nvim, tmux also crashes

[fallenbeck]

There is a fix on the tmux side:
tmux/tmux#3983

[zeertzjq]

There is another use of DECRQSS in runtime/lua/vim/_defaults.lua

[wookayin]

Can you please attach tmux log if possible?

[zeertzjq]

Hmm, according to tmux/tmux#3983 this seems to happen because DECRQSS conflicts with tmux's handling of sixel, while detecting tmux in Docker using environment variables does not work.

[joshuali925]

I can confirm rebuilding tmux from HEAD on master branch fixes it.

On tmux 3.4 (host) setting the TMUX environment variable (in docker) before opening nvim could prevent crashing tmux, but setting TERM=tmux-256color does not work. I also tried to comment out tui_query_extended_underline(tui); but tmux still crashes, so I'm not sure if it's this

neovim/src/nvim/tui/tui.c

Line 1916 in 27fb629

bool tmux = terminfo_is_term_family(term, "tmux") || !!os_getenv("TMUX");

neovim/src/nvim/tui/tui.c

Lines 429 to 434 in 27fb629

	// Don't use DECRQSS in screen or tmux, as they behave strangely when receiving it.
	// Terminal.app also doesn't support DECRQSS.
	if (tui->unibi_ext.set_underline_style == -1 && !(screen || tmux || nsterm)) {
	// Query the terminal to see if it supports extended underline.
	tui_query_extended_underline(tui);
	}

[GNITOAHC]

I use iterm2 + tmux version 3.4 on MacOS.
When ssh to a Ubuntu 22.04.4 LTS with nvim v0.10.0 it crash my tmux, too.

[splooge]

Similar issue

localhost$ tmux -V
tmux 3.4

localhost$ tmux -vvv
localhost$ ssh remotehost
remotehost$ nvim -v
NVIM v0.10.0
Build type: Release
LuaJIT 2.1.0-beta3
Run "nvim -V1 -v" for more info

remotehost$ nvim --clean
[server exited unexpectedly]

tmux-logs.tar.gz

[xvzc]

Thanks to @fallenbeck, installing tmux 3.5 fixed it for me.

[farzadmf]

Question: how is this "completed"? Is the solution installing tmux 3.5??

[dundargoc]

Question: how is this "completed"? Is the solution installing tmux 3.5??

Yeah. Tmux has already made a fix for this so there's no reason for us to keep track if this anymore.