[Mono-bugs] [Bug 74996][Blo] New - MI/ method lookup oddness ...

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Changed by michael at ximian.com.

http://bugzilla.ximian.com/show_bug.cgi?id=74996

--- shadow/74996	2005-05-19 12:47:52.000000000 -0400
+++ shadow/74996.tmp.6103	2005-05-19 12:47:52.000000000 -0400
@@ -0,0 +1,76 @@
+Bug#: 74996
+Product: Mono: Runtime
+Version: 1.1
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Blocker
+Component: misc
+AssignedTo: mono-bugs at ximian.com                            
+ReportedBy: michael at ximian.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: MI/ method lookup oddness ...
+
+I have this code:
+
+    public string testMulti(XMulti multi)
+    {
+	Console.WriteLine("HERE: enter testMulti");
+	if (multi == null)
+		Console.WriteLine("ERROR: multi is null");
+	else
+		Console.WriteLine("HERE: multi is " + multi);
+        try {
+	    Console.WriteLine("HERE: chop -0");
+            checkEqual(61 * 6, multi.fn61(6));
+	    Console.WriteLine("HERE: chop1");
+            checkEqual(11 * 1, multi.fn11(1));	# Line 719
+	    Console.WriteLine("HERE: chop2");	# Line 720
+
+
+When run it prints out:
+
+HERE: multi is Uno object proxy. OID: 
+...
+HERE: chop -0
+...
+HERE: chop0
+HERE: chop1
+CallManaged TargetInvocationException
+System.Reflection.TargetInvocationException: Exception has been thrown by
+the target of an invocation. ---> System.NullReferenceException: Object
+reference not set to an instance of an object
+in [0x00063] (at
+/opt/OpenOffice/src680-m102/testtools/source/bridgetest/cli/cli_cs_testobj.cs:720)
+cs_testobj.BridgeTestObject:testMulti (XMulti multi)
+in <0x00000> <unknown method>
+in (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke
+(object,object[])
+in [0x00044] (at
+/opt/mono/mcs/class/corlib/System.Reflection/MonoMethod.cs:127)
+System.Reflection.MonoMethod:Invoke (System.Object obj, BindingFlags
+invokeAttr, System.Reflection.Binder binder, System.Object[] parameters,
+System.Globalization.CultureInfo culture)--- End of inner exception stack
+trace ---
+
+ie. it crashes trying to invoke '.fn11'
+
+The problem with claiming the object is Nil is that we just invoked a
+method on it: The object structure is indeed highly complex -
+involving multiply inherited interfaces. The IDL is here:
+
+http://go-oo.org/lxr/source/udk/testtools/source/bridgetest/idl/bridgetest.idl#137
+
+Notice the 'fn11' method is implemented on the 'XMultiBase1' interface.
+
+Notice the 'fn61' method is implemented on a derived child & executes
+fine.
+
+I attach the dll with the compiled types from this idl.
+
+HTH :-)