* lib/rubygems: Update to RubyGems 2.4.2.

* test/rubygems:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47748 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 1 deletions

diff --git a/lib/rubygems/source/git.rb b/lib/rubygems/source/git.rb
index fb9cbce2fb..35c2270a74 100644
--- a/lib/rubygems/source/git.rb
+++ b/lib/rubygems/source/git.rb
@@ -178,9 +178,17 @@ class Gem::Source::Git < Gem::Source
   # Converts the git reference for the repository into a commit hash.
 
   def rev_parse # :nodoc:
+    hash = nil
+
     Dir.chdir repo_cache_dir do
-      Gem::Util.popen(@git, 'rev-parse', @reference).strip
+      hash = Gem::Util.popen(@git, 'rev-parse', @reference).strip
     end
+
+    raise Gem::Exception,
+          "unable to find reference #{@reference} in #{@repository}" unless
+            $?.success?
+
+    hash
   end
 
   ##