From a0640ddd05f0316b72f3b31be7802f53fe06657e Mon Sep 17 00:00:00 2001
From: Karl Williamson <khw@cpan.org>
Date: Fri, 15 Nov 2019 15:01:15 -0700
Subject: [PATCH] PATCH: gh#17218 memory leak

Indeed, a variable's ref count was not getting decremented.

(cherry picked from commit 0463f3a19af7afac8b402655ad66e5b05c095bcc)
---
 regcomp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/regcomp.c b/regcomp.c
index 88282081a893..ad52e70c2cde 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -18159,6 +18159,7 @@ S_regclass(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth,
 
                 /* Likewise for 'posixes' */
                 _invlist_union(posixes, cp_list, &cp_list);
+                SvREFCNT_dec(posixes);
 
                 /* Likewise for anything else in the range that matched only
                  * under UTF-8 */