Add regression test for #668506

diff --git a/mcs/class/corlib/Test/System/TypeTest.cs b/mcs/class/corlib/Test/System/TypeTest.cs
index f415e027167af8e535aaa5502b428b9421aaf071..6720334ea35b9c813f6cd569bd2dc536dedc5602 100644 (file)
--- a/mcs/class/corlib/Test/System/TypeTest.cs
+++ b/mcs/class/corlib/Test/System/TypeTest.cs
@@ -3887,6 +3887,13 @@ PublicKeyToken=b77a5c561934e089"));
                        MustTLE (string.Format ("{0}ZZZZ,{1}", typeof (MyRealEnum).FullName, aqn));
                }
 
+               delegate void MyAction<in T>(T ag);
+
+               [Test] //bug #668506
+               public void IsAssignableFromWithVariantDelegate () {
+                       Assert.IsFalse (typeof(MyAction<string>).IsAssignableFrom(typeof(MyAction<>)), "#1");
+               }
+
 #endif
 
                public abstract class Stream : IDisposable