Don't set erc-server-announced-name unless known

* lisp/erc/erc.el (erc-open): whenever this function is called, the
variable `erc-server-announced-name' may be set locally in the calling
server buffer.  However, if that buffer's dialed server matches that
of the one being created, the announced name is copied over on faith.
But there's no guarantee that the name will match the one ultimately
emitted by the server during its introductory burst.  Beyond
potentially causing confusion in protocol logs, this behavior may
complicate debugging efforts.  Setting the variable to nil helps
ensure a consistent environment when preparing a buffer for all newly
dialed connections.  This commit also simplifies the setting of
`erc-server-connected', which is always nil when connecting and
vice-versa.

diff --git a/lisp/erc/erc.el b/lisp/erc/erc.el
index 2ee461a6635a3faea6b7b70b9178517ab7b3ce72..7f102dcefb137433ff69b6998df2a30a876ecf52 100644 (file)
--- a/lisp/erc/erc.el
+++ b/lisp/erc/erc.el
@@ -2047,11 +2047,7 @@ or t, which means that `auth-source' will be queried for the
 private key and the certificate.
 
 Returns the buffer for the given server or channel."
-  (let ((server-announced-name (when (and (boundp 'erc-session-server)
-                                          (string= server erc-session-server))
-                                 erc-server-announced-name))
-        (connected-p (unless connect erc-server-connected))
-        (buffer (erc-get-buffer-create server port channel))
+  (let ((buffer (erc-get-buffer-create server port channel))
         (old-buffer (current-buffer))
         old-point
         (continued-session (and erc-reuse-buffers erc--server-reconnecting)))
@@ -2062,8 +2058,9 @@ Returns the buffer for the given server or channel."
     (let ((old-recon-count erc-server-reconnect-count))
       (erc-mode)
       (setq erc-server-reconnect-count old-recon-count))
-    (setq erc-server-announced-name server-announced-name)
-    (setq erc-server-connected connected-p)
+    (when (setq erc-server-connected (not connect))
+      (setq erc-server-announced-name
+            (buffer-local-value 'erc-server-announced-name old-buffer)))
     ;; connection parameters
     (setq erc-server-process process)
     (setq erc-insert-marker (make-marker))