[Xcb] [Bug 92652] _XReadEvents is treating EAGAIN as a fatal error instead of just trying again

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92652

--- Comment #9 from Jeremy Huddleston Sequoia <jeremyhu at freedesktop.org> ---
Looks like the WM is calling XKillClient():

(lldb) bt
* thread #3: tid = 0x20aab8, function: CloseDownConnection , stop reason =
breakpoint 5.1
  * frame #0: 0x0000000101f44780 X11.bin`CloseDownConnection
    frame #1: 0x0000000101e1f804 X11.bin`CloseDownClient + 484
    frame #2: 0x0000000101e3a84a X11.bin`ProcKillClient + 314
    frame #3: 0x0000000101e1ebf4 X11.bin`Dispatch + 1172

And digging into quartz-wm's code, we see:

- (void) do_close:(Time)timestamp
{
    TRACE ();

    if (_does_wm_delete_window)
    {
        XEvent e;

        e.xclient.type = ClientMessage;
        e.xclient.window = _id;
        e.xclient.message_type = atoms.wm_protocols;
        e.xclient.format = 32;
        e.xclient.data.l[0] = atoms.wm_delete_window;
        e.xclient.data.l[1] = timestamp;

        XSendEvent (x_dpy, _id, False, 0, &e);
    }
    else
    {
        XKillClient (x_dpy, _id);
    }
}

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