patch 8.2.3612: using freed memory with regexp using a mark
Problem: Using freed memory with regexp using a mark.
Solution: Get the line again after getting the mark position.
diff --git a/src/regexp_nfa.c b/src/regexp_nfa.c
index c7db981..a0f1a96 100644
--- a/src/regexp_nfa.c
+++ b/src/regexp_nfa.c
@@ -6834,8 +6834,16 @@
case NFA_MARK_GT:
case NFA_MARK_LT:
{
+ size_t col = rex.input - rex.line;
pos_T *pos = getmark_buf(rex.reg_buf, t->state->val, FALSE);
+ // Line may have been freed, get it again.
+ if (REG_MULTI)
+ {
+ rex.line = reg_getline(rex.lnum);
+ rex.input = rex.line + col;
+ }
+
// Compare the mark position to the match position, if the mark
// exists and mark is set in reg_buf.
if (pos != NULL && pos->lnum > 0)