mesa-18.0.0 (currently in [testing]) graphics corruption?

[Oon-Ee Ng via arch-general <arch-general@xxxxxxxxxxxxx>]

Any other [testing] users getting severe graphics corruption on
mesa-18.0.0? I'm on Intel graphics.

Bug report already made https://bugs.archlinux.org/task/58012 but I'm
worried this is something unique to my system (unlikely maintainer of mesa
would NOT have noticed the symptoms I'm getting...)