* net/tramp.el (tramp-error): VEC-OR-PROC can be nil.

(tramp-action-password): Clear password cache if needed.
(tramp-read-passwd): Do not clear password cache.

* net/tramp-gvfs.el (tramp-gvfs-handler-askpassword): Clear password
cache unless it is the first password request.

lisp/ChangeLog

+2014-03-06  Michael Albinus  <michael.albinus@gmx.de>
+
+	* net/tramp.el (tramp-error): VEC-OR-PROC can be nil.
+	(tramp-action-password): Clear password cache if needed.
+	(tramp-read-passwd): Do not clear password cache.
+
+	* net/tramp-gvfs.el (tramp-gvfs-handler-askpassword): Clear password
+	cache unless it is the first password request.
+
 2014-03-06  Glenn Morris  <rgm@gnu.org>
 
 	* simple.el (newline): Doc tweak.

lisp/net/tramp-gvfs.el

@@ -1180,10 +1180,14 @@ ADDRESS can have the form \"xx:xx:xx:xx:xx:xx\" or \"[xx:xx:xx:xx:xx:xx]\"."
 		      (zerop (logand flags tramp-gvfs-password-need-username))))
 	    (setq user (read-string "User name: ")))
 	  (when (and (zerop (length domain))
-		     (not (zerop (logand flags tramp-gvfs-password-need-domain))))
+		     (not
+		      (zerop (logand flags tramp-gvfs-password-need-domain))))
 	    (setq domain (read-string "Domain name: ")))
 
 	  (tramp-message l 6 "%S %S %S %d" message user domain flags)
+	  (unless (tramp-get-connection-property l "first-password-request" nil)
+	    (tramp-clear-passwd l))
+
 	  (setq tramp-current-method l-method
 		tramp-current-user user
 		tramp-current-host l-host
@@ -1474,7 +1478,7 @@ connection if a previous connection has died for some reason."
 	      (format "Opening connection for %s using %s" host method)
 	    (format "Opening connection for %s@%s using %s" user host method))
 
-	;; Enable auth-source and password-cache.
+	;; Enable `auth-source'.
 	(tramp-set-connection-property vec "first-password-request" t)
 
 	;; There will be a callback of "askPassword" when a password is

lisp/net/tramp.el

@@ -1560,12 +1560,13 @@ signal identifier to be raised, remaining arguments passed to
 `tramp-message'.  Finally, signal SIGNAL is raised."
   (let (tramp-message-show-message)
     (tramp-backtrace vec-or-proc)
-    (tramp-message
-     vec-or-proc 1 "%s"
-     (error-message-string
-      (list signal
-	    (get signal 'error-message)
-	    (apply 'format fmt-string arguments))))
+    (when vec-or-proc
+      (tramp-message
+       vec-or-proc 1 "%s"
+       (error-message-string
+	(list signal
+	      (get signal 'error-message)
+	      (apply 'format fmt-string arguments)))))
     (signal signal (list (apply 'format fmt-string arguments)))))
 
 (defsubst tramp-error-with-buffer
@@ -3400,6 +3401,12 @@ of."
   (with-current-buffer (process-buffer proc)
     (let ((enable-recursive-minibuffers t)
 	  (case-fold-search t))
+      ;; Let's check whether a wrong password has been sent already.
+      ;; Sometimes, the process returns a new password request
+      ;; immediately after rejecting the previous (wrong) one.
+      (goto-char (point-min))
+      (when (search-forward-regexp tramp-wrong-passwd-regexp nil t)
+	(tramp-clear-passwd vec))
       (tramp-check-for-regexp proc tramp-password-prompt-regexp)
       (tramp-message vec 3 "Sending %s" (match-string 1))
       ;; We don't call `tramp-send-string' in order to hide the
@@ -3508,8 +3515,8 @@ The terminal type can be configured with `tramp-terminal-type'."
 PROC and VEC indicate the remote connection to be used.  POS, if
 set, is the starting point of the region to be deleted in the
 connection buffer."
-  ;; Enable `auth-source' and `password-cache'.  We must use
-  ;; tramp-current-* variables in case we have several hops.
+  ;; Enable `auth-source'.  We must use tramp-current-* variables in
+  ;; case we have several hops.
   (tramp-set-connection-property
    (tramp-dissect-file-name
     (tramp-make-tramp-file-name
@@ -4131,9 +4138,6 @@ Invokes `password-read' if available, `read-passwd' else."
                    "password" tramp-current-host tramp-current-method)))
 	   ;; Try the password cache.
 	   (when (functionp 'password-read)
-	     (unless (tramp-get-connection-property
-		      v "first-password-request" nil)
-	       (tramp-compat-funcall 'password-cache-remove key))
 	     (let ((password
 		    (tramp-compat-funcall 'password-read pw-prompt key)))
 	       (tramp-compat-funcall 'password-cache-add key password)