Ref / NotNull struct

[Namespace]

I found an error: if you have something like this

[code]
void const_ref_foo(const Ref!(Foo) rf) {
	write("Const: ");
	rf.say();
}
[/code]

and call it with

[code]
Foo f1 = new Foo();
const_ref_foo(f1);
[/code]

You get this error:

ref_test.d(101): Error: template 
ref_test.Ref!(Foo).Ref.Proxy!(_obj).opDispatch!
("say").opDispatch does not match any function template 
declaration
D:\D\dmd2\windows\bin\..\..\src\phobos\std\typecons.d(2842): 
Error: template ref
_test.Ref!(Foo).Ref.Proxy!(_obj).opDispatch!("say").opDispatch(this 
X,Args...) c
annot deduce template function from argument types !()()

To avoid this you must change line 2842 in std.typecons from

[code]
auto ref opDispatch(this X, Args...)(Args args) { return 
mixin("a."~name~"(args)"); }
[/code]

in

[code]
auto ref opDispatch(this X, Args...)(Args args) inout { return 
mixin("a."~name~"(args)"); }
[/code]

It seems to be a bug. But must i create a new bug report for 
something like this?