From: Po Lu <luangruo@yahoo.com>
Date: Thu, 2 Jun 2022 08:36:03 +0000 (+0800)
Subject: Fix rare crash when async input happens while creating xm drag window
X-Git-Tag: emacs-29.0.90~1910^2~284
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=760fd43082975ba9400d846b87e2016f43e98c85;p=emacs.git

Fix rare crash when async input happens while creating xm drag window

* src/xterm.c (xm_get_drag_window): Work around XCloseDisplay
freezing upon being interrupted by a signal.
---

diff --git a/src/xterm.c b/src/xterm.c
index f280fea4cb9..d0aa8874b6b 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -1744,7 +1744,12 @@ xm_get_drag_window (struct x_display_info *dpyinfo)
 			   (unsigned char *) &drag_window, 1);
 	}
 
+      /* FIXME: why does XCloseDisplay hang if SIGIO arrives and there
+	 are multiple displays? */
+      unrequest_sigio ();
       XCloseDisplay (temp_display);
+      request_sigio ();
+
       XSetErrorHandler (old_handler);
       XSetIOErrorHandler (old_io_handler);