(mouse-drag-region): Ignore event end-point if it is not a number.

1 files changed, 5 insertions, 2 deletions

diff --git a/lisp/mouse.el b/lisp/mouse.el
index 8da7095bada..ef41a38caad 100644
--- a/lisp/mouse.el
+++ b/lisp/mouse.el
@@ -524,7 +524,7 @@ remains active.  Otherwise, it remains until the next input event."
               nil
             (setq end (event-end event)
                   end-point (posn-point end))
-            (if end-point
+            (if (numberp end-point)
                 (setq last-end-point end-point))
 
             (cond
@@ -574,7 +574,10 @@ remains active.  Otherwise, it remains until the next input event."
                         (cons event unread-command-events)))
               (if (not (= (overlay-start mouse-drag-overlay)
                           (overlay-end mouse-drag-overlay)))
-                  (let* ((stop-point (or (posn-point (event-end event)) last-end-point))
+                  (let* ((stop-point
+                          (if (numberp (posn-point (event-end event)))
+                              (posn-point (event-end event))
+                            last-end-point))
                          ;; The end that comes from where we ended the drag.
                          ;; Point goes here.
                          (region-termination