bug#49955: 28.0.50; Emacs got quasi freeze

[Masaru Nomiya <nomiya@galaxy.dti.ne.jp>]

Hello,

In the Message; 

  Subject    : bug#49955: 28.0.50; Emacs got quasi freeze
  Message-ID : <87pmunvv19.wl-nomiya@galaxy.dti.ne.jp>
  Date & Time: Mon, 09 Aug 2021 18:12:32 +0900

[MN] == Masaru Nomiya <nomiya@galaxy.dti.ne.jp> has written:

MN> Hello.

MN> With this pacth;

MN> commit 483c5e953c12a95382bef4a3b6769a680c32fe86
MN> Author: Martin Rudalics <rudalics@gmx.at>
MN> Date:   Wed May 5 10:26:32 2021 +0200

MN>     Fix two GTK3 event handling issues
    
MN>     * src/xterm.c (handle_one_xevent): For GTK3 PropertyNotify and
MN>     MapNotify events explicitly request the stored frame sizes when
MN>     the frame changes from iconified to a non-hidden state
MN>     (Bug#24526).  For Expose events do not change the frame's
MN>     visibility or iconified state.  For FocusIn events on GTK3 do
MN>     not apply the fix for Bug#42655.  The latter two changes are to
MN>     avoid that plain invisible frames get reported as iconified.

MN> Emacs has often got a quasi freeze, not perfect freeze but doesn't
MN> accept any openraion except quitting operation.

This issue was solved by;

Tweak x_connection_closed when I/O error
* src/xterm.c (x_connection_closed): Don’t dereference dpyinfo
in the unlikely case where it is null and ioerror is true.
This pacifies gcc 11.2.1 -Wanalyzer-null-dereference.
 master
@eggert
eggert committed 7 days ago 

Thanks a lot!

---
┏━━┓彡     Masaru Nomiya              mail-to: nomiya @ galaxy.dti.ne.jp
┃＼／彡
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