1 files changed, 27 insertions, 0 deletions
diff --git a/test/rubygems/test_gem_installer.rb b/test/rubygems/test_gem_installer.rb
index 8874577aa8..dae2b070d5 100644
--- a/test/rubygems/test_gem_installer.rb
+++ b/test/rubygems/test_gem_installer.rb
@@ -288,6 +288,33 @@ gem 'other', version
                  "(SyntaxError)", e.message
   end
 
+  def test_ensure_no_race_conditions_between_installing_and_loading_gemspecs
+    a, a_gem = util_gem 'a', 2
+
+    Gem::Installer.at(a_gem).install
+
+    t1 = Thread.new do
+      5.times do
+        Gem::Installer.at(a_gem).install
+        sleep 0.1
+      end
+    end
+
+    t2 = Thread.new do
+      _, err = capture_output do
+        20.times do
+          Gem::Specification.load(a.spec_file)
+          Gem::Specification.send(:clear_load_cache)
+        end
+      end
+
+      assert_empty err
+    end
+
+    t1.join
+    t2.join
+  end
+
   def test_ensure_loadable_spec_security_policy
     pend 'openssl is missing' unless Gem::HAVE_OPENSSL