Subject: bug#40200: 28.0.50; NS: text drawing glitches in maximized frame with frame-inhibit-implied-resize

From: Andrii Kolomoiets <[email-masked]>
Date: Mon, 23 Mar 2020 20:13:19 +0200

1. emacs -Q
2. (setq frame-inhibit-implied-resize t)
3. M-x toggle-frame-maximized
4. C-x b RET (to open *Messages* buffer)
5. M-x tool-bar-mode

After some up-down mouse scroll, buffer text is drawn incorrectly.

Not sure if image attaches are allowed here, so screenshot is on imgur:
https://imgur.com/a/QSSNePE

In GNU Emacs 28.0.50 (build 2, x86_64-apple-darwin19.3.0, NS appkit-1894.30 Version 10.15.3 (Build 19D76))
 of 2020-03-18 built on muffinmac.local
Windowing system distributor 'Apple', version 10.3.1894
System Description:  Mac OS X 10.15.3