(with-case-table): Use `make-symbol' to avoid variable capture.

Restore the table in the same buffer.

1 files changed, 9 insertions, 5 deletions

diff --git a/lisp/subr.el b/lisp/subr.el
index 1a49ae6c73e..1a70c53a879 100644
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -2485,11 +2485,15 @@ in BODY."
   "Execute the forms in BODY with TABLE as the current case table.
 The value returned is the value of the last form in BODY."
   (declare (indent 1) (debug t))
-  `(let ((old-case-table (current-case-table)))
-     (unwind-protect
-         (progn (set-case-table ,table)
-                ,@body)
-       (set-case-table old-case-table))))
+  (let ((old-case-table (make-symbol "table"))
+        (old-buffer (make-symbol "buffer")))
+    `(let ((,old-case-table (current-case-table))
+           (,old-buffer (current-buffer)))
+       (unwind-protect
+           (progn (set-case-table ,table)
+                  ,@body)
+         (with-current-buffer ,old-buffer
+           (set-case-table ,old-case-table))))))
 
 ;;;; Constructing completion tables.