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From 70f089724b15d1b2ed9264f277454aa559d50232 Mon Sep 17 00:00:00 2001
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From: Karl Williamson <khw@cpan.org>
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Date: Fri, 15 Nov 2019 15:01:15 -0700
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Subject: [PATCH] PATCH: gh#17218 memory leak
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Indeed, a variable's ref count was not getting decremented.
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---
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 regcomp.c | 1 +
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 1 file changed, 1 insertion(+)
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diff --git a/regcomp.c b/regcomp.c
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index ddac290d2bf0..de4f6f24dac8 100644
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--- a/regcomp.c
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+++ b/regcomp.c
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@@ -17602,6 +17602,7 @@ S_regclass(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth,
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                 /* Likewise for 'posixes' */
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                 _invlist_union(posixes, cp_list, &cp_list);
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+                SvREFCNT_dec(posixes);
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                 /* Likewise for anything else in the range that matched only
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                  * under UTF-8 */