Swift compiler crash in Xcode 7.1

crash.swift

// 1. same name of functions with different signature in both protocol and protocol extension
// 2. someone is conforming to the protocol
// This should be compile error though, error does not happen. Instead Compiler crashes in AST -> SIL conversion phase.
protocol FooProtocol {
  func sameName(differentSignature: Bool) -> UITableViewCell?
}

extension FooProtocol {
  func sameName() -> UITableViewCell {
    return UITableViewCell()
  }
}

// someone needs to conform to the protocol
class Foo: FooProtocol {}

Already fixed in Xcode 7.3