Hyper: Tmux Pane Boundaries Made of Strange Characters

[dwtj]

I'm using:

• Mac OS X v10.11.5
• Tmux v2.2 (No .tmux.conf file used)
• HyperTerm v0.4.5

Tmux should look something like this (as seen here in iTerm 2 v3.0.5):

However, here's the kind of thing that I am consistently seeing when using tmux within HyperTerm:

And this is what it looks like if the cursor is in the top pane:

And this is what it looks like if the session is open in another smaller terminal:

[x]

There seem to be some general unicode issues. For example, if I run a script

echo "💩"

in iterm, it echos 💩 to STDOUT.

But in hyperterm I get the unicode replacement character.

[x]

A temporary solution would be to force tmux to use ascii characters for drawing borders.

Adding the following to my ~/.tmux.conf and restarting tmux did the trick.

set-option -ga terminal-overrides ',*:enacs@:smacs@:rmacs@:acsc@'

[dwtj]

That did the trick for me! Thanks for the workaround, @x.

[x]

Another thing that seems to have worked for me is forcing tmux to be in unicode mode by using tmux -u (in my .bashrc I've just set alias tmux="tmux -u").

Maybe this isn't an issue with displaying unicode after all and rather an issue with the programs misunderstanding what the terminal understands?

[micimize]

@x that also made vim's NERDTree arrows work 👍

[x]

I'm not sure about anyone else, but I'm no longer seeing this issue in 0.7.1 when running tmux without either of my previous suggestions.

I think this issue can be closed.

[spinningarrow]

I'm still seeing this issue on HyperTerm 0.7.1.36

[ajorgensen]

I am also seeing this issue even with @x suggestions.

tmux.conf:

set-option -ga terminal-overrides ',*:enacs@:smacs@:rmacs@:acsc@'

Command: tmux -u -f ./tmux.conf

Version: Version 0.7.1 (0.7.1.36)

One other interesting tidbit is that it only happens at larger windows sizes, over 1400 x 100 or so. At smaller window sizes the artifacts do not show up for me.

[trevordmiller]

Same problem here. Here is a gif of me switching panes with the question mark characters. Couldn't duplicate in any other terminal emulator so it seems to be related to HyperTerm.

[flybayer]

I'm no longer seeing this bug on master!

[ekmartin]

This was probably fixed by #769 :smile:

[trevordmiller]

I just ran a brew cask install --force hyperterm and I'm still getting the question marks when switching tmux panes as shown in my gif ^

Is this not latest HyperTerm with this fix in it? Or is this a separate issue?

[flybayer]

It's only fixed on the current master branch. It'll be in the next version when it's released!