Multiple protocol inheritance in Swift 2.0 using extension protocols

Question

Playing with the new extension protocols in Swift 2.0 come by this example:

protocol A {
  func foo()
}

protocol B {
  func foo()
}

extension A {
    func foo() { print("A") }
}

extension B {
    func foo() { print("B") }
}

class C: A, B {

}

Is something like a "multiple inheritance" , that some languages like Python and C++ can handle as multiple inheritance of course. What really surprise me was the two compile errors that Xcode 7.0 Beta 4 gave me:

Type 'C' does not conform to protocol 'A'

---

Type 'C' does not conform to protocol 'B'

But this error not make any sense because the error must reflect that exist conflict or ambiguity between protocol A and B regarding the use of the foo function, or something like that.

If you put below of the above code the following line :

C().foo()

This launches exactly the error type I talking about:

Ambiguous use of 'foo'

My question here is :

With the new addition of extension protocols in Swift 2.0 has Apple considered any treatment to this kind of "multiple inheritance"(something like the way of C++ treatment) or just is not allowed at all?