Created attachment 143736 [details]
glxinfo output

Since upgrading to mesa 19.0.0 rendering in kitty
(https://sw.kovidgoyal.net/kitty/) an OpenGL terminal is broken, with various
artifacts, for details, see https://github.com/kovidgoyal/kitty/issues/1484

Downgrading mesa to 18.3.4 fixes it. I have a report from a user that mesa
18.3.5 also breaks it, but I cannot confirm myself. This is on Arch Linux x64
up-to-date.

I have attached output of glxinfo. 

To reproduce, simply install kitty and run it with mesa 19 -- under Wayland I
get the first line in the terminal blinking with the cursor. Under X11 I get
the first four characters being not rendered.

I have attached glxinfo and apitrace output running kitty with mesa 19.