[Mono-devel-list] Regression: Attribute.GetCustomAttribute no longer returns attributes from base classes

[Gert Driesen]

Hi,

There's a serious regression in Mono (built from cvs) with regards to
custom attributes.

The Attribute.GetCustomAttribute method no longer returns a custom
attribute that was assigned to a property of a base class, when invoke on a
derived class.

For example, when you have the following classes :

       public class DerivedDecoratedClass : DecoratedClass {
        }


        public class DecoratedClass {
                private string _dunno;


                [TestAttribute("test")]
                public string Dunno {
                        get { return _dunno; }
                        set { _dunno = value; }
                }
        }

then

Attribute.GetCustomAttribute(property, typeof(TestAttribute)) for the Dunno
property of the DerivedDecoratedClass will return null, while this should
not.

This used to work fine in Mono 0.30, and still works as expected in MS.NET.

I attached a test case for this issue, which yields the following on Mono
0.30 and MS.NET :

Checking attribute on 'AttributeIssue.DecoratedClass'.
Dunno property: Attribute found
Checking attribute on 'AttributeIssue.DerivedDecoratedClass'.
Dunno property: Attribute found

but on Mono built from cvs, the result is :

Checking attribute on 'AttributeIssue.DecoratedClass'.
Dunno property: Attribute found
Checking attribute on 'AttributeIssue.DerivedDecoratedClass'.
Dunno property: Attribute not found!

as you'll see, Mono does not seem to be able to return the attribute on
the derived class.

Because of this issue NAnt  is no longer functional on Mono/Linux, so I
filed a bug report on this in bugzilla (#54716,
http://bugzilla.ximian.com/show_bug.cgi?id=54716).

Gert
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