From 7b604a554dfb6630fe32e739334fa57341dc6123 Mon Sep 17 00:00:00 2001
From: Dirk Lemstra <dirk@git.imagemagick.org>
Date: Mon, 17 Jul 2017 23:13:50 +0200
Subject: [PATCH] Fix another leak related to #574.

---
 MagickCore/quantize.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/MagickCore/quantize.c b/MagickCore/quantize.c
index 851a24015..5281ee2c4 100644
--- a/MagickCore/quantize.c
+++ b/MagickCore/quantize.c
@@ -3395,8 +3395,11 @@ static MagickBooleanType SetGrayscaleImage(Image *image,
     IntensityCompare);
   colormap=(PixelInfo *) AcquireQuantumMemory(image->colors,sizeof(*colormap));
   if (colormap == (PixelInfo *) NULL)
-    ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
-      image->filename);
+    {
+      colormap_index=(ssize_t *) RelinquishMagickMemory(colormap_index);
+      ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
+        image->filename);
+    }
   j=0;
   colormap[j]=image->colormap[0];
   for (i=0; i < (ssize_t) image->colors; i++)
-- 
2.40.0