From 5a9b26e5bfa6dc834b2d3eb0729123c40479de5c Mon Sep 17 00:00:00 2001
From: dirk <dirk@git.imagemagick.org>
Date: Sat, 23 Jul 2016 13:05:55 +0200
Subject: [PATCH] Added check for channel mask when setting the pixel.

---
 MagickCore/image.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MagickCore/image.c b/MagickCore/image.c
index 730b16df3..a8e98f870 100644
--- a/MagickCore/image.c
+++ b/MagickCore/image.c
@@ -1113,6 +1113,7 @@ MagickExport MagickBooleanType CopyImagePixels(Image *image,
         PixelTrait traits=GetPixelChannelTraits(image,channel);
         PixelTrait source_traits=GetPixelChannelTraits(source_image,channel);
         if ((traits == UndefinedPixelTrait) ||
+            ((traits & UpdatePixelTrait) == 0) ||
             (source_traits == UndefinedPixelTrait))
           continue;
         SetPixelChannel(image,channel,p[i],q);
-- 
2.40.0