struct Foo {
  #if swift(>=3)
    init<S: Sequence>(elements: S) {}
  #else 
    init<S: SequenceType>(elements: S) {}
  #endif
}

func test() {
  let c = 26
  let foo = Foo(elements: (0 ... 2 * c + 1).map { ($0 & ~1, String($0)) }) 
  print(foo)
}

complex-expression.swift:11:13: error: expression was too complex to be solved in reasonable time; consider breaking up the expression into distinct sub-expressions
  let foo = Foo(elements: (0 ... 2 * c + 1).map { ($0 & ~1, String($0)) }) 
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~