diff --git a/test/test/spec/weakref_spec.rb b/test/test/spec/weakref_spec.rb
index 65a817df..6b0d7c4a 100644
--- a/test/test/spec/weakref_spec.rb
+++ b/test/test/spec/weakref_spec.rb
@@ -44,6 +44,7 @@ describe "WeakRef" do
     hash = {weak_key => 42}
     hash[key].should == 42
     hash[weak_key].should == 42
+    hash["key"].should == 42
 
     hash = {weak_key => 42}
     hash[weak_key] = 123
diff --git a/vm b/vm
index 0e12100f..2271086d 160000
--- a/vm
+++ b/vm
@@ -1 +1 @@
-Subproject commit 0e12100fc0adea21e83a541d8779ca4d9a395e79
+Subproject commit 2271086dd7e38a43baa2b1db05e185b15e97f9c9