diff -u markdown-1.0.1/Markdown.pl markdown-1.0.1/Markdown.pl
--- markdown-1.0.1/Markdown.pl
+++ markdown-1.0.1/Markdown.pl
@@ -218,7 +218,7 @@
 		my $text;
 		{
 			local $/;               # Slurp the whole file
-			$text = <>;
+			defined($text = <>) or exit 2;
 		}
         print Markdown($text);
     }
diff -u markdown-1.0.1/debian/changelog markdown-1.0.1/debian/changelog
--- markdown-1.0.1/debian/changelog
+++ markdown-1.0.1/debian/changelog
@@ -1,3 +1,10 @@
+markdown (1.0.1-10) unstable; urgency=medium
+
+  * Exit with a non-zero exit code if the input file cannot be opened,
+    thanks to Chris Lamb, closes: #886032.
+
+ -- Matt Kraai <kraai@ftbfs.org>  Mon, 01 Jan 2018 16:09:01 -0800
+
 markdown (1.0.1-9) unstable; urgency=medium
 
   * Seed the random number generator with the SOURCE_DATE_EPOCH