RE: Speeding up the compiler

The following code now leads to an infinite recursion:

./scala -e 'trait T[A[_]]; implicitly[T[Stream]]'

This patch [1] fixes the symptoms, but even with this applied, the
companion object of the de-aliased type is not searched, as shown by
this test [2].

-jason

[1] http://github.com/retronym/scala/commit/d9395b506e5057ca72a0a34bc66be266...
[2] http://github.com/retronym/scala/commit/83ae270fdfbb5ebad45045034484c78e...