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Changed by vladimir@pobox.com.
http://bugzilla.ximian.com/show_bug.cgi?id=47817
--- shadow/47817 2003-08-22 04:34:33.000000000 -0400
+++ shadow/47817.tmp.14625 2003-08-22 04:34:33.000000000 -0400
@@ -0,0 +1,89 @@
+Bug#: 47817
+Product: Mono/Runtime
+Version: unspecified
+OS:
+OS Details:
+Status: NEW
+Resolution:
+Severity:
+Priority: Normal
+Component: misc
+AssignedTo: mono-bugs@ximian.com
+ReportedBy: vladimir@pobox.com
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL:
+Cc:
+Summary: RealProxy implementing IRemotingTypeInfo.CanCastTo is ignored for casts
+
+the following sample program:
+
+---- bug5.cs ----
+
+using System;
+using System.Runtime.Remoting;
+using System.Runtime.Remoting.Messaging;
+using System.Runtime.Remoting.Proxies;
+
+public abstract class TestClass : MarshalByRefObject {
+ public abstract void Foo ();
+}
+
+public abstract class Derived : TestClass {
+}
+
+public class TestProxy : RealProxy, IRemotingTypeInfo {
+ public TestProxy (Type baseType) : base (baseType)
+ {
+ }
+
+ public override IMessage Invoke (IMessage msg) {
+ Console.WriteLine ("Invoke: ");
+ Console.WriteLine (msg.GetType());
+
+ IMethodCallMessage mcall = msg as IMethodCallMessage;
+
+ IMethodReturnMessage ret = new ReturnMessage (null, null, 0,
+ mcall.LogicalCallContext,
+ mcall);
+ Console.WriteLine ("Finish");
+ return ret;
+ }
+
+ string tn;
+ string IRemotingTypeInfo.TypeName {
+ get { return tn; }
+ set { tn = value; }
+ }
+
+ bool IRemotingTypeInfo.CanCastTo (System.Type target, object o) {
+ Console.WriteLine ("CanCastTo " + target);
+ return true;
+ }
+}
+
+public class Driver {
+ public delegate void FooDelegate();
+
+ public static void Main () {
+ TestProxy tp = new TestProxy (typeof(TestClass));
+ TestClass tc = (TestClass) tp.GetTransparentProxy();
+
+ Derived d = (Derived) tc;
+ }
+}
+
+---- end ----
+
+Generates:
+Unhandled Exception: System.InvalidCastException: Cannot cast from source
+type to destination type
+in <0x000a7> 00 .Driver:Main ()
+
+under mcs/mono post-0.26 cvs.
+
+Under the MS CLR, v1.1 it correctly prints "CanCastTo Derived" indicating
+that CanCastTo was called.
+
+(Note that the IL itself is correct -- a mcs-compiled test5.exe verifies
+and executes under the MS CLR.)