commit b07626d4afa73dd2af0f03c0d59eed25ee159ef9
author Bram Moolenaar <Bram@vim.org> Mon Oct 11 15:40:43 2021 +0100
committer Bram Moolenaar <Bram@vim.org> Mon Oct 11 15:40:43 2021 +0100
tree 3d4c106e4390dfe22993a551c3e7892e032c10a2
parent cddd5ac911707034ca27f10037c4b1b523188c47

patch 8.2.3494: illegal memory access in utf_head_off

Problem:    Illegal memory access in utf_head_off.
Solution:   Check cursor position when reselecting the Visual area.
            (closes #8963)

src/normal.c

diff --git a/src/normal.c b/src/normal.c
index 8a4e778..9cc2ea9 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -5671,8 +5671,7 @@
 	    {
 		curwin->w_cursor.lnum +=
 				    resel_VIsual_line_count * cap->count0 - 1;
-		if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
-		    curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
+		check_cursor();
 	    }
 	    VIsual_mode = resel_VIsual_mode;
 	    if (VIsual_mode == 'v')