bug#50534: 28.0.50; Toolbar shows despite tool-bar-mode being disabled on macOS

[Rudolf Adamkovič]

"Kirill A. Korinsky" via "Bug reports for GNU Emacs, the Swiss 
army knife of text editors" <bug-gnu-emacs@gnu.org> writes:

> I have one bad news: it still exists but less often.  I can 
> reproduce it one time in 10 starts of my emacs.

FYI:

I observe the bug on my Mac as well. When I execute M-x and 
tool-bar-mode, it says "Tool-bar mode enabled" or "Tool-bar mode 
disabled", but no matter what the message says, the tool bar does 
its own thing. Sometimes, Emacs says "Tool-bar mode enabled", and 
the tool bar hides. Other times, the opposite happens, or the 
command does nothing at all, despite Emacs saying that it enabled 
or disabled the tool bar. Chaos!

I observe the above on Emacs 28 from master, commit 
0934363c96ff774ce242b51529688bbfbb48ba02, which includes 
1e83d04214 * Fix incorrectly appearing toolbar on NS (bug#50534).

R+
--
"Contrariwise," continued Tweedledee, "if it was so, it might be; 
and if it were so, it would be; but as it isn't, it ain't. That's 
logic." -- Lewis Carroll, Through the Looking Glass  Rudolf 
Adamkovič <salutis@me.com> Studenohorská 25 84103 Bratislava 
Slovakia  [he/him]