From 77606a810f155128c8a1ecfbc06fc68fb35db3d7 Mon Sep 17 00:00:00 2001
From: Brian Duggan <bduggan@matatu.org>
Date: Sat, 8 Feb 2014 12:41:09 -0500
Subject: [PATCH] prevent error for invalid output timezone

---
 lib/DDG/Goodie/TimezoneConverter.pm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/DDG/Goodie/TimezoneConverter.pm b/lib/DDG/Goodie/TimezoneConverter.pm
index d35944d98..e6c7a8015 100644
--- a/lib/DDG/Goodie/TimezoneConverter.pm
+++ b/lib/DDG/Goodie/TimezoneConverter.pm
@@ -151,6 +151,7 @@ handle query => sub {
     return unless defined $gmt_input_timezone;
 
     my $gmt_output_timezone = parse_timezone $output_timezone;
+    return unless defined($gmt_output_timezone);
 
     $modifier += $gmt_output_timezone - $gmt_input_timezone;
     for ( $gmt_input_timezone, $gmt_output_timezone ) {