func a(b: Int = 0) {}
let c = a // should be (b: Int) -> Void, not (b: Int = 0) -> Void
Fixes crash suite #23.
rdar://problem/18232797
Swift SVN r24747
Add all compiler crash tests to the validation-test/compiler_crashers
subdirectory. Add a RUN: line to each test case according to the current
behavior of the Swift compiler.
Swift SVN r23418