From 8972de9ff7fd8357b172b293b56ec9521d90151b Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 9 May 2017 17:41:10 +0000
Subject: [PATCH] dump stub specifications if nil

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58642 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/rubygems/specification.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/rubygems/specification.rb b/lib/rubygems/specification.rb
index e387ada2b3..57f0429b56 100644
--- a/lib/rubygems/specification.rb
+++ b/lib/rubygems/specification.rb
@@ -723,6 +723,9 @@ class Gem::Specification < Gem::BasicSpecification
   def self._all # :nodoc:
     unless defined?(@@all) && @@all then
       @@all = stubs.map(&:to_spec)
+      if @@all.any?(&:nil?) # TODO: remove once we're happy
+        raise "nil spec! included in #{stubs.inspect}"
+      end
 
       # After a reset, make sure already loaded specs
       # are still marked as activated.