Similar thing happens when using an escape sequence to change cursor color ie. echo -ne "\e]12;orange1\a". on Gnome Terminal 3.6.2 (and RoxTerm too) but only when attached to a tmux session. xterm escape sequence for cursor colors works with or without tmux.
Attached shows character and 112 sequence occurring in Gnome Terminal using tmux. ** Attachment added: "Screenshot 2016-01-13 15:30:31.png" https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/1435905/+attachment/4549570/+files/Screenshot%202016-01-13%2015%3A30%3A31.png -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-terminal in Ubuntu. https://bugs.launchpad.net/bugs/1435905 Title: gnome-terminal randomly outputs control characters To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/1435905/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs