From a6e2cf5eb0444f90b6d979f999f32def0b52b17e Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Mon, 30 Sep 2019 12:24:06 +0200
Subject: [PATCH] avfilter/f_metadata: do not memleak expr

---
 libavfilter/f_metadata.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavfilter/f_metadata.c b/libavfilter/f_metadata.c
index 97e5c669fe..2ed1393cba 100644
--- a/libavfilter/f_metadata.c
+++ b/libavfilter/f_metadata.c
@@ -283,6 +283,8 @@ static av_cold void uninit(AVFilterContext *ctx)
 {
     MetadataContext *s = ctx->priv;
 
+    av_expr_free(s->expr);
+    s->expr = NULL;
     if (s->avio_context) {
         avio_closep(&s->avio_context);
     }