From 9be2d6cc8daed2886604e97aaaf4aeb7b8f4ee14 Mon Sep 17 00:00:00 2001
From: John Cupitt <jcupitt@gmail.com>
Date: Fri, 28 Nov 2014 17:54:01 +0000
Subject: [PATCH] improve vipsthumbnail with broken images

if there was an incorrect embedded profile, no fallback import profile,
and an export profile, vipsthumbnail could crash

see https://github.com/jcupitt/libvips/issues/186
---
 tools/vipsthumbnail.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/vipsthumbnail.c b/tools/vipsthumbnail.c
index aff2dd7d..690d9c33 100644
--- a/tools/vipsthumbnail.c
+++ b/tools/vipsthumbnail.c
@@ -575,7 +575,11 @@ thumbnail_shrink( VipsObject *process, VipsImage *in,
 			out = t[7];
 		}
 
-		in = out;
+		/* If the embedded profile failed and there's no fallback or
+		 * the fallback failed, out will still be NULL.
+		 */
+		if( out )
+			in = out;
 	}
 
 	/* If we are upsampling, don't sharpen, since nearest looks dumb