The culprit happened to be a type representation cloner for tuple type
representations that didn't actually clone anything. Introduce an
AST-level verifier that makes sure we catch any archetypes that slip
into interface types earlier in the future.
Fixes rdar://problem/18796397 and the three dupes I've found so far.
Swift SVN r28080
includes a number of QoI things to help people write the correct code. I will commit
the testcase for it as the next patch.
The bulk of this patch is moving the stdlib, testsuite and validation testsuite to
the new syntax. I moved a few uses of "as" patterns back to as? expressions in the
stdlib as well.
Swift SVN r27959
Handle substitutions properly when a typealias declared in a protocol
extension is used to satisfy an associated type requirement. Fixes
rdar://problem/20564605.
Swift SVN r27490
Fixes the crash in rdar://problem/20564378. In these cases, we end up
swallowing some diagnostics. That will be addressed in a subsequent
commit.
Swift SVN r27436
