commit 5c56da4de8398566ef96122db44ec93e6c2d483a
author Bram Moolenaar <Bram@vim.org> Sat Aug 28 14:42:25 2021 +0200
committer Bram Moolenaar <Bram@vim.org> Sat Aug 28 14:42:25 2021 +0200
tree 0c7aac811e244588fec88c6243f2a255887f541d
parent 60b6e6f6cc60ac99253e1c13bd0cae4ef0e43201

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 #8260)

src/globals.h

diff --git a/src/globals.h b/src/globals.h
index 6d9741b..b64e5cb 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1902,7 +1902,7 @@
 #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.