UI Dissappears while playing game

[joshuacaplan]

When playing on an Ubuntu 16.04 machine and an Ubuntu 17.10 machine the UI dissappears while playing the game. In order to make it re-appear you need to press the arrow keys. Then the UI will re-appear and you can continue playing (until the UI disappears again).

Please see here for a demo of this bug.

[bfontaine]

Thanks for the report!

I can reproduce on an old Ubuntu as well (14.04), with both Python 2 and 3. I’ll check what could be the cause this weekend.

[bfontaine]

Seems to be Linux-only as I can’t reproduce on macOS.

Edit: I wonder if it has anything to do with TERM and ncurses differences on macOS and Linux. See http://invisible-island.net/ncurses/ncurses.faq.html.

The default $TERM on macOS is xterm-256color. I tried setting it to xterm but didn’t get the issue. According to /usr/include/ncurses.h I have ncurses v5.7 (patch 20081102).

Edit 2: $TERM is xterm on my Ubuntu but setting it to xterm-256color doesn’t change anything. I don’t use ncurses so it shouldn’t be the source of the problem.

[Cosinhs]

The same problem happens on windows(win 7) too.

[Artemis21]

Pressing the arrow keys only makes it reappear if it also updates the board.

[Kerkpower]

also happens in termux

[bfontaine]

I can reproduce on Ubuntu 20.04 with Python 3.9.10 but not on macOS. It appears to be quite random because it doesn’t always show a blank screen at the same point in the code. Forcing print to always flush doesn’t solve the issue.