patch 9.0.0017: accessing memory beyond the end of the line

Problem:    Accessing memory beyond the end of the line.
Solution:   Stop Visual mode when closing a window.

src/testdir/test_visual.vim

@@ -1469,5 +1469,17 @@ func Test_visual_paste_clipboard()
   bwipe!
 endfunc
 
+func Test_visual_area_adjusted_when_hiding()
+  " The Visual area ended after the end of the line after :hide
+  call setline(1, 'xxx')
+  vsplit Xfile
+  call setline(1, 'xxxxxxxx')
+  norm! $o
+  hid
+  norm! zW
+  bwipe!
+  bwipe!
+endfunc
+
 
 " vim: shiftwidth=2 sts=2 expandtab