# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1630154703 -7200
# Node ID cb0868062915e712621b9ed57553929a4f555603
# Parent  aa8b03b0145717984c82f0493871fa4ec6f6a58b
patch 8.2.3381: crash when using NULL list with sign functions

Commit: https://github.com/vim/vim/commit/5c56da4de8398566ef96122db44ec93e6c2d483a
Author: Bram Moolenaar <Bram@vim.org>
Date:   Sat Aug 28 14:42:25 2021 +0200

    patch 8.2.3381: crash when using NULL list with sign functions

    Problem:    Crash when using NULL list with sign functions.
    Solution:   Handle a NULL list like an empty list. (issue https://github.com/vim/vim/issues/8260)

diff --git a/src/globals.h b/src/globals.h
--- a/src/globals.h
+++ b/src/globals.h
@@ -1902,7 +1902,7 @@ EXTERN int channel_need_redraw INIT(= FA
 #endif
 
 #define FOR_ALL_LIST_ITEMS(l, li) \
-    for ((li) = (l)->lv_first; (li) != NULL; (li) = (li)->li_next)
+    for ((li) = (l) == NULL ? NULL : (l)->lv_first; (li) != NULL; (li) = (li)->li_next)
 
 // While executing a regexp and set to OPTION_MAGIC_ON or OPTION_MAGIC_OFF this
 // overrules p_magic.  Otherwise set to OPTION_MAGIC_NOT_SET.
diff --git a/src/testdir/test_signs.vim b/src/testdir/test_signs.vim
--- a/src/testdir/test_signs.vim
+++ b/src/testdir/test_signs.vim
@@ -2012,4 +2012,11 @@ func Test_sign_funcs_multi()
   call delete("Xsign")
 endfunc
 
+func Test_sign_null_list()
+  eval test_null_list()->sign_define()
+  eval test_null_list()->sign_placelist()
+  eval test_null_list()->sign_undefine()
+  eval test_null_list()->sign_unplacelist()
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3381,
+/**/
     3380,
 /**/
     3379,