From adefba1b03089ce10293892b432f5154b4f5e543 Mon Sep 17 00:00:00 2001
From: Glenn Randers-Pehrson <glennrp at users.sourceforge.net>
Date: Mon, 16 Oct 2017 21:03:43 -0500
Subject: [PATCH] [libpng16] Free tRNS chunk data when abandoning it

---
 pngset.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pngset.c b/pngset.c
index d6b540384..750fc2c38 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1038,6 +1038,7 @@ png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr,
           {
             png_warning(png_ptr,
                 "tRNS chunk has out-of-range samples for bit_depth");
+            png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
             return;
           }
       }