Default methods and Auto-dereference

[bluss]

Default methods interact surprisingly with Auto-dereference

The first version (method provided by trait impl) auto-dereferences and works.

trait A { fn a(&self); }
impl A for int { fn a(&self) {} };
let s = &1i; s.a()

Moving the method implementation to a default method, does not resolve any more:

trait A { fn a(&self) { } }
impl A for int { } ;
let s = &1i; s.a()
<anon>:22:0: 22:6 error: type `&<VI0>` does not implement any method in scope named `a`

cc @msullivan

Relevant to issue #6246

First discovered this issue with Newtypes. But it also applies to simple &T auto-deref! Edited to simplify the testcase.

[bluss]

This should be a valid refactorization if default methods and newtypes exist in Rust together like this. (concerns more than newtypes)

[msullivan]

Um, this seems to work perfectly well to me.

[bluss]

it does indeed work. I'm hitting some kind of autoderef issue, but this is not it.