master d456120: Fix Tramp bug#49229

[Michael Albinus]

branch: master
commit d4561201891a53b7536fae98862b04535a1489c4
Author: Michael Albinus <michael.albinus@gmx.de>
Commit: Michael Albinus <michael.albinus@gmx.de>

    Fix Tramp bug#49229
    
    * lisp/net/tramp.el (tramp-file-name-handler): Drop possible
    volume letter when `expand-file-name' is called with a local
    absolute file name as first argument.  (Bug#49229)
---
 lisp/net/tramp.el | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lisp/net/tramp.el b/lisp/net/tramp.el
index 0f15e4a..c3b088a 100644
--- a/lisp/net/tramp.el
+++ b/lisp/net/tramp.el
@@ -2610,7 +2610,14 @@ Fall back to normal file name handler if no Tramp file 
name handler exists."
 
       ;; When `tramp-mode' is not enabled, or the file name is quoted,
       ;; we don't do anything.
-      (tramp-run-real-handler operation args))))
+      ;; When operation is `expand-file-name', and the first argument
+      ;; is a local absolute file name, we end also here.  Handle the
+      ;; MS Windows case.
+      (funcall
+       (if (and (eq operation 'expand-file-name)
+               (not (string-match-p "\\`[[:alpha:]]:/" (car args))))
+          #'tramp-drop-volume-letter #'identity)
+       (tramp-run-real-handler operation args)))))
 
 (defun tramp-completion-file-name-handler (operation &rest args)
   "Invoke Tramp file name completion handler for OPERATION and ARGS.