[Mono-bugs] [Bug 76472][Nor] New - [GMCS] incorrect CS0309 / return type constraint does not consider generic method argument constraints

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Changed by atsushi at ximian.com.

http://bugzilla.ximian.com/show_bug.cgi?id=76472

--- shadow/76472	2005-10-19 02:29:46.000000000 -0400
+++ shadow/76472.tmp.20126	2005-10-19 02:29:46.000000000 -0400
@@ -0,0 +1,52 @@
+Bug#: 76472
+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: [GMCS] incorrect CS0309 / return type constraint does not consider generic method argument constraints
+
+The example code below results in CS0309 error as if generic "where T :
+IBar" does not exist.
+
+interface IFoo {}
+interface IBar {}
+
+class C1<IFoo> where IFoo : IBar
+{
+}
+
+abstract class C2
+{
+        public abstract C1<T> Hoge<T> () where T : IBar;
+}
+
+class C3 : C2
+{
+        public override C1<T> Hoge<T> () { return null; }
+}
+
+
+Actual Results:
+
+inherit-constraint2.cs(15,18): error CS0309: The type `T' must be
+convertible to `IBar' in order to use it as parameter `IFoo' in the generic
+type or method `C1`1<IFoo>'
+
+Expected Results:
+
+no CS0309 error.
+
+How often does this happen? 
+
+consistently.