Comment # 28 on bug 104362 from nmr

I get that it's triggered by Mesa, but don't you think it's a bug itself that
user-space can hang the kernel? I can't even switch virtual consoles when it
hangs. 

I'm currently running Linux waldorf 4.19.0-2-amd64 #1 SMP Debian 4.19.16-1
(2019-01-17) x86_64 GNU/Linux

I'll report back when I upgrade to 4.20