In any case, I asked for a C-level backtrace when I responded to your original report. Can you please attach a debugger to Emacs after selecting the previously iconified frame, and show such a backtrace? Please do that with an unpatched Emacs and in "emacs -Q".

Thanks.


On August 4, 2020 5:21:21 AM GMT+03:00, Eli Zaretskii <eliz@gnu.org> wrote:
From: Tino Calancha <tino.calancha@gmail.com>
Date: Mon, 3 Aug 2020 21:46:49 +0200 (CEST)
cc: Tino Calancha <tino.calancha@gmail.com>, 42655@debbugs.gnu.org, 
    eggert@cs.ucla.edu, monnier@iro.umontreal.ca, uyennhi.qm@gmail.com

How about in Windows? Have you seen this bug?

No, nothing like that.





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