From c7031d85274a2b7eda524bf43e95610bd8ae1d00 Mon Sep 17 00:00:00 2001
From: mattn <mattn.jp@gmail.com>
Date: Thu, 7 Feb 2013 16:35:26 +0900
Subject: Ignore empty gem

---
 tasks/mruby_build_gem.rake | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tasks/mruby_build_gem.rake b/tasks/mruby_build_gem.rake
index 80990773d..69dd4cafc 100644
--- a/tasks/mruby_build_gem.rake
+++ b/tasks/mruby_build_gem.rake
@@ -5,7 +5,9 @@ module MRuby
       gemrake = File.join(gemdir, "mrbgem.rake")
 
       fail "Can't find #{gemrake}" unless File.exists?(gemrake)
+      Gem.current = nil
       load gemrake
+      return nil unless Gem.current
 
       Gem.current.dir = gemdir
       Gem.current.build = MRuby::Build.current
-- 
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