Document GTK Emacs kill on display close in PROBLEMS.

* src/xterm.c (x_connection_closed): Expand comment.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/xterm.c b/src/xterm.c
index 1de49e2fde1..143500256a1 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -7911,7 +7911,13 @@ x_connection_closed (dpy, error_message)
 #endif
 
 #ifdef USE_GTK
-      /* Due to bugs in some Gtk+ versions, just exit here. */
+      /* There is a long-standing bug in GTK that prevents the GTK
+         main loop from recovering gracefully from disconnects
+         (https://bugzilla.gnome.org/show_bug.cgi?id=85715).  Among
+         other problems, this gives rise to a stream of Glib error
+         messages that, in one incident, filled up a user's hard disk
+         (http://lists.gnu.org/archive/html/emacs-devel/2010-10/msg00927.html).
+         So, kill Emacs unconditionally if the display is closed.  */
       {
         fprintf (stderr, "%s\n", error_msg);
         Fkill_emacs (make_number (70));