[Mono-bugs] [Bug 78367][Nor] New - incorrect CS0019 : hidden member takes precedence over "new" member on resolving member

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Changed by atsushi at ximian.com.

http://bugzilla.ximian.com/show_bug.cgi?id=78367

--- shadow/78367	2006-05-11 06:47:34.000000000 -0400
+++ shadow/78367.tmp.21903	2006-05-11 06:47:34.000000000 -0400
@@ -0,0 +1,76 @@
+Bug#: 78367
+Product: Mono: Compilers
+Version: 1.1
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: C#
+AssignedTo: rharinath at novell.com                            
+ReportedBy: atsushi at ximian.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: incorrect CS0019 : hidden member takes precedence over "new" member on resolving member
+
+In the following code, there are "new Bar Document" in the derived class
+XElement, and "Foo Document" in the base class Element. 
+
+In CrashHere(), Document.Root should be regarded as IHoge as defined in
+Bar. Since IHoge could be a derived class from XElement, this expression
+should be allowed.
+
+--------
+
+namespace TestNS
+{
+	public interface IHoge {}
+
+	public class Foo {}
+
+	public class XElement : Element
+	{
+		public new Bar Document { get { return null; } }
+
+		public object CrashHere {
+			get { return (Document.Root == this) ? null : ""; }
+		}
+	}
+
+	public class Element
+	{
+		public Foo Document { get { return null; } }
+	}
+
+	public class Bar
+	{
+		public IHoge Root { get { return null; } }
+	}
+--------
+
+
+Actual Results:
+
+- svg.cs(11,18): error CS0019: Operator `==' cannot be applied to operands
+of type `TestNS.Bar.Root' and `TestNS.XElement'
+
+
+Expected Results:
+
+- no CS0019 error.
+
+
+How often does this happen? 
+
+- consistently.
+
+
+Additional Information:
+
+The same problem happens when you create another derived class YElement and
+move CrashHere() method there.
+
+I extracted this small repro code from SharpVectorGraphics 0.4 Alpha.