# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1643311807 -3600
# Node ID 5d6774c0df4f9bdae5187eb2f3221ee9746eeb66
# Parent  00712672b53fe8474f0251c47a6e0967d6e14dba
patch 8.2.4233: crash when recording and using Select mode

Commit: https://github.com/vim/vim/commit/a4bc2dd7cccf5a4a9f78b58b6f35a45d17164323
Author: Bram Moolenaar <Bram@vim.org>
Date:   Thu Jan 27 19:27:16 2022 +0000

    patch 8.2.4233: crash when recording and using Select mode

    Problem:    Crash when recording and using Select mode.
    Solution:   When deleting the last recorded character check there is something
                to delete.

diff --git a/src/getchar.c b/src/getchar.c
--- a/src/getchar.c
+++ b/src/getchar.c
@@ -252,8 +252,11 @@ add_buff(
     static void
 delete_buff_tail(buffheader_T *buf, int slen)
 {
-    int len = (int)STRLEN(buf->bh_curr->b_str);
-
+    int len;
+
+    if (buf->bh_curr == NULL || buf->bh_curr->b_str == NULL)
+	return;  // nothing to delete
+    len = (int)STRLEN(buf->bh_curr->b_str);
     if (len >= slen)
     {
 	buf->bh_curr->b_str[len - slen] = NUL;
diff --git a/src/testdir/test_registers.vim b/src/testdir/test_registers.vim
--- a/src/testdir/test_registers.vim
+++ b/src/testdir/test_registers.vim
@@ -739,6 +739,15 @@ func Test_record_in_insert_mode()
   bwipe!
 endfunc
 
+func Test_record_in_select_mode()
+  new
+  call setline(1, 'text')
+  sil norm q00
+  sil norm q
+  call assert_equal('0ext', getline(1))
+  bwipe!
+endfunc
+
 " Make sure that y_append is correctly reset
 " and the previous register is working as expected
 func Test_register_y_append_reset()
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4233,
+/**/
     4232,
 /**/
     4231,