What should I do before opening an issue?

Before opening an issue, please ensure that:

• Your problem is a specific problem or question or suggestion, not a general complaint.

• $TERM inside tmux is screen, screen-256color, tmux or tmux-256color. Check by running echo $TERM inside tmux.

• You can reproduce the problem with the latest tmux release, or a build from Git master.

• Your question or issue is not covered in the manual (run man tmux).

• Your problem is not mentioned in the CHANGES file file.

• Nobody else has opened the same issue recently.

What should I include in an issue?

Please include the output of:

uname -sp && tmux -V && echo $TERM

Also include:

• Your platform (Linux, OS X, or whatever).

• A brief description of the problem with steps to reproduce.

• A minimal tmux config, if you can't reproduce without a config.

• Your terminal, and $TERM inside and outside of tmux.

• Logs from tmux (see below).

• At most one or two screenshots, if helpful.

How do I test without a .tmux.conf?

Run a separate tmux server with -f/dev/null to skip loading .tmux.conf:

tmux -Ltest kill-server
tmux -Ltest -f/dev/null new

How do I get logs from tmux?

Add -vv to tmux to create three log files in the current directory. If you can reproduce without a configuration file:

tmux -Ltest kill-server
tmux -vv -Ltest -f/dev/null new

Or if you need your configuration:

tmux kill-server
tmux -vv new

The log files are:

• tmux-server*.log: server log file.

• tmux-client*.log: client log file.

• tmux-out*.log: output log file.

Please attach the log files to your issue.

link: https://github.com/tmux/tmux/blob/master/.github/CONTRIBUTING.md