From: Eli Zaretskii <eliz@gnu.org>
Date: Tue, 19 Sep 2017 17:11:42 +0000 (+0300)
Subject: Fix crashes in 'move-point-visually' in minibuffer windows
X-Git-Tag: emacs-26.0.90~127
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=c83d0c5fdfd374d5c2e1547d05f02ab3b47a4a5a;p=emacs.git

Fix crashes in 'move-point-visually' in minibuffer windows

* src/xdisp.c (Fmove_point_visually): Fix off-by-one error in
comparing against the last valid glyph_row of a window glyph
matrix.  (Bug#28505)
---

diff --git a/src/xdisp.c b/src/xdisp.c
index dc5dbb05762..141275f15a0 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -22395,8 +22395,8 @@ Value is the new character position of point.  */)
 	    row += dir;
 	  else
 	    row -= dir;
-	  if (row < MATRIX_FIRST_TEXT_ROW (w->current_matrix)
-	      || row > MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w))
+	  if (!(MATRIX_FIRST_TEXT_ROW (w->current_matrix) <= row
+		&& row < MATRIX_BOTTOM_TEXT_ROW (w->current_matrix, w)))
 	    goto simulate_display;
 
 	  if (dir > 0)