commit f7d31adcc22eae852d6e7a5b59e9755ba7b51d35
author Christian Brabandt <cb@256bit.org> Tue Apr 16 22:23:17 2024 +0200
committer Christian Brabandt <cb@256bit.org> Tue Apr 16 22:23:17 2024 +0200
tree 7dfcab9b1a01a58b7b284ae2347e0e5261a3fb60
parent 8560e6cf9797ea1d55ecaea6bf8ee8ec783c291a

patch 9.1.0340: Problem: Error with matchaddpos() and empty list

Problem:  Error with matchaddpos() and empty list
          (@rickhow)
Solution: Return early for an empty list

fixes: #14525
closes: #14563

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/match.c

diff --git a/src/match.c b/src/match.c
index f59c206..bc50757 100644
--- a/src/match.c
+++ b/src/match.c
@@ -87,7 +87,7 @@
     m = ALLOC_CLEAR_ONE(matchitem_T);
     if (m == NULL)
 	return -1;
-    if (pos_list != NULL)
+    if (pos_list != NULL && pos_list->lv_len > 0)
     {
 	m->mit_pos_array = ALLOC_CLEAR_MULT(llpos_T, pos_list->lv_len);
 	if (m->mit_pos_array == NULL)
@@ -1294,7 +1294,7 @@
 	return;
     }
     l = argvars[1].vval.v_list;
-    if (l == NULL)
+    if (l == NULL || l->lv_len == 0)
 	return;
 
     if (argvars[2].v_type != VAR_UNKNOWN)