Re: macOS metal rendering engine in mac port

[Y . E .]

> Nobody has any idea what they were doing when it happened? Scrolling
> or typing or resizing windows or anything?

AFAIR, I switched from another buffer.

> Someone in an unrelated bug report suggested something similar
> happened after they created a new frame (which doesn't make much
> sense, unless Emacs is drawing to the wrong frame). Was anyone doing
> anything like that? Child frames popping up for use with, I don't
> know, company mode or something?

During the period I saw the artifacts I extensively used both additional
frames (but the artifacts were in the initial frame) and company-mode
with native tooltip overlay.

> Where on the frame do these things happen?

Middle part.

> If it happens again please send a screenshot of the whole frame.

Sure.