(scroll-bar-drag-1):

Calculate position relative to the accessible part of the buffer.

diff --git a/lisp/scroll-bar.el b/lisp/scroll-bar.el
index cddce3e419c1bba96b62bb050eb6351bbbc91b28..fa7e4a6d3ecff001067e091b254d19275d704ef9 100644 (file)
--- a/lisp/scroll-bar.el
+++ b/lisp/scroll-bar.el
@@ -103,7 +103,10 @@ EVENT should be a scroll bar click or drag event."
         (portion-whole (nth 2 start-position)))
     (save-excursion
       (set-buffer (window-buffer window))
-      (goto-char (scroll-bar-scale portion-whole (buffer-size)))
+      ;; Calculate position relative to the accessible part of the buffer.
+      (goto-char (+ (point-min)
+                   (scroll-bar-scale portion-whole
+                                     (- (point-max) (point-min)))))
       (beginning-of-line)
       (set-window-start window (point)))))