patch 8.2.3915: illegal memory access when completing with invalid bytes
Problem: illegal memory access when completing with invalid bytes.
Solution: Avoid going over the end of the completion text.
diff --git a/src/insexpand.c b/src/insexpand.c
index b0319a2..9fb7fb7 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -3437,7 +3437,12 @@
void
ins_compl_insert(int in_compl_func)
{
- ins_bytes(compl_shown_match->cp_str + ins_compl_len());
+ int compl_len = ins_compl_len();
+
+ // Make sure we don't go over the end of the string, this can happen with
+ // illegal bytes.
+ if (compl_len < (int)STRLEN(compl_shown_match->cp_str))
+ ins_bytes(compl_shown_match->cp_str + compl_len);
if (compl_shown_match->cp_flags & CP_ORIGINAL_TEXT)
compl_used_match = FALSE;
else