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bug#5650: 23.1; ERC causes Emacs to hang on network dropouts

From: Chong Yidong
Subject: bug#5650: 23.1; ERC causes Emacs to hang on network dropouts
Date: Sat, 14 Aug 2010 19:05:56 -0400

> > When my network connection drops out, ERC loses its connection and
> > attempts to reconnect. I see the message "connecting to server
> > irc.freenode.net 6777..." in the minibuffer and Emacs becomes
> > unresponsive.
> ...
> I made a patch that increments erc-server-reconnect-count before calling
> erc-server-reconnect instead, and resets it only when the connection is
> really ready, that is, in erc-connection-established.


Could someone please review this patch by Thomas Riccardi and Vivek
Dasmohapatra?  The full description of the problem can be viewed at



diff --git a/.emacs.d/erc-5.3/erc-backend.el b/.emacs.d/erc-5.3/erc-backend.el
index 70ce789..928770e 100644
--- a/.emacs.d/erc-5.3/erc-backend.el
+++ b/.emacs.d/erc-5.3/erc-backend.el
@@ -618,13 +618,11 @@ EVENT is the message received from the closed connection 
           (condition-case err
                 (setq erc-server-reconnecting nil)
-                (erc-server-reconnect)
-                (setq erc-server-reconnect-count 0))
+                (setq erc-server-reconnect-count (1+ 
+                (erc-server-reconnect))
             (error (when (buffer-live-p buffer)
                      (set-buffer buffer)
-                     (if (integerp erc-server-reconnect-attempts)
-                         (setq erc-server-reconnect-count
-                               (1+ erc-server-reconnect-count))
+                     (unless (integerp erc-server-reconnect-attempts)
                        (message "%s ... %s"
                                 "Reconnecting until we succeed"
                                 "kill the ERC server buffer to stop"))
diff --git a/.emacs.d/erc-5.3/erc.el b/.emacs.d/erc-5.3/erc.el
index 9aa5e8b..802ae66 100644
--- a/.emacs.d/erc-5.3/erc.el
+++ b/.emacs.d/erc-5.3/erc.el
@@ -4267,6 +4267,7 @@ Set user modes and run `erc-after-connect' hook."
            (nick (car (erc-response.command-args parsed)))
            (buffer (process-buffer proc)))
        (setq erc-server-connected t)
+       (setq erc-server-reconnect-count 0)
        (erc-set-initial-user-mode nick buffer)
        (erc-server-setup-periodical-ping buffer)

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