scala/scala — pull request #3980 by retronym (2014-09-14 22:23:44+00:00)
Title: SI-8844 Fix regression with existentials + type aliases

Regressed in 2a1b15e / SI-8283. Another specimen of an archetypal
bug: unwanted dealising by using `typeSymbol`, rather than
`typeSymbolDirect`.

Review by @lrytz