master 9f03300c5c6: Add PROBLEMS entry for bug#72517

[Thomas Fitzsimmons]

branch: master
commit 9f03300c5c626bf6f8f839be4943cc20db89c24d
Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
Commit: Thomas Fitzsimmons <fitzsim@fitzsim.org>

    Add PROBLEMS entry for bug#72517
    
    * etc/PROBLEMS (X runtime problems): Document ssh -X session
    hang-on-exit after deletion of remote emacsclient -c frame.
    (bug#72517)
---
 etc/PROBLEMS | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/etc/PROBLEMS b/etc/PROBLEMS
index 7d7c9ab5f27..4d6927705b1 100644
--- a/etc/PROBLEMS
+++ b/etc/PROBLEMS
@@ -1778,6 +1778,23 @@ happen without any special user interaction, for 
example, when Emacs
 restores a saved desktop.  A fix is to install version 2.6.8 of FVWM,
 see https://debbugs.gnu.org/cgi/bugreport.cgi?bug=31650.
 
+*** ssh -X session hangs on exit after remote emacsclient -c frame is deleted.
+
+When Emacs is configured with an X toolkit, for example,
+--with-x-toolkit=lucid, and "emacsclient -c" is run over an "ssh -X"
+connection, deleting the emacsclient frame (via C-x 5 0 or C-x C-c) can
+leave the X display connection open.
+
+The symptom is that after you delete the "emacsclient -c" frame and then
+attempt to exit ssh (with C-d, or "exit"), ssh will hang before
+returning you to the local shell.  You will have to press C-c (to sever
+the X connection) before ssh returns you to your local shell (that is,
+the shell from which you invoked "ssh -X").
+
+To avoid this issue configure Emacs with --with-x-toolkit=no.
+
+See <URL:https://debbugs.gnu.org/72517>.
+
 ** General X problems
 
 *** Redisplay using X is much slower than previous Emacs versions.