# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1677939304 -3600
# Node ID 7d94b1c0f292cb2afb284750e009d2d36e03364e
# Parent  1b6ac899f07942ba8f1326284f15208d75543610
patch 9.0.1378: illegal memory access when using virtual editing

Commit: https://github.com/vim/vim/commit/c99cbf8f289bdda5d4a77d7ec415850a520330ba
Author: Bram Moolenaar <Bram@vim.org>
Date:   Sat Mar 4 14:13:10 2023 +0000

    patch 9.0.1378: illegal memory access when using virtual editing

    Problem:    Illegal memory access when using virtual editing.
    Solution:   Make sure "startspaces" is not negative.

diff --git a/src/register.c b/src/register.c
--- a/src/register.c
+++ b/src/register.c
@@ -1245,6 +1245,8 @@ op_yank(oparg_T *oap, int deleting, int 
 				// double-count it.
 				bd.startspaces = (ce - cs + 1)
 							  - oap->start.coladd;
+				if (bd.startspaces < 0)
+				    bd.startspaces = 0;
 				startcol++;
 			    }
 			}
diff --git a/src/testdir/test_virtualedit.vim b/src/testdir/test_virtualedit.vim
--- a/src/testdir/test_virtualedit.vim
+++ b/src/testdir/test_virtualedit.vim
@@ -88,6 +88,16 @@ func Test_edit_change()
   set virtualedit=
 endfunc
 
+func Test_edit_special_char()
+  new
+  se ve=all
+  norm a0
+  sil! exe "norm o00000\<Nul>k<a0s"
+
+  bwipe!
+  set virtualedit=
+endfunc
+
 " Tests for pasting at the beginning, end and middle of a tab character
 " in virtual edit mode.
 func Test_paste_in_tab()
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1378,
+/**/
     1377,
 /**/
     1376,