available-at.swift:6:1: error: 'function()' is unavailable
function()
^~~~~~~~
available-at.swift:2:6: note: 'function()' has been explicitly marked unavailable here
func function() {
     ^
(source_file
  (func_decl "function()" type='() -> ()' access=internal
    (parameter_list)
    (brace_stmt
      (call_expr type='()' location=available-at.swift:3:2 range=[available-at.swift:3:2 - line:3:14] nothrow
        (declref_expr type='(Any..., separator: String, terminator: String) -> ()' location=available-at.swift:3:2 range=[available-at.swift:3:2 - line:3:2] decl=Swift.(file).print(_:separator:terminator:) specialized=no)
        (tuple_shuffle_expr implicit type='(Any..., separator: String, terminator: String)' location=available-at.swift:3:8 range=[available-at.swift:3:7 - line:3:14] sourceIsScalar elements=[-2, -1, -1] variadic_sources=[0]
          (paren_expr type='Any' location=available-at.swift:3:8 range=[available-at.swift:3:7 - line:3:14]
            (erasure_expr implicit type='Any' location=available-at.swift:3:8 range=[available-at.swift:3:8 - line:3:8]
              (call_expr implicit type='String' location=available-at.swift:3:8 range=[available-at.swift:3:8 - line:3:8] nothrow
                (constructor_ref_call_expr implicit type='(_builtinStringLiteral: RawPointer, utf8CodeUnitCount: Word, isASCII: Int1) -> String' location=available-at.swift:3:8 range=[available-at.swift:3:8 - line:3:8] nothrow
                  (declref_expr implicit type='String.Type -> (_builtinStringLiteral: RawPointer, utf8CodeUnitCount: Word, isASCII: Int1) -> String' location=available-at.swift:3:8 range=[available-at.swift:3:8 - line:3:8] decl=Swift.(file).String.init(_builtinStringLiteral:utf8CodeUnitCount:isASCII:) specialized=no)
                  (type_expr implicit type='String.Type' location=available-at.swift:3:8 range=[available-at.swift:3:8 - line:3:8] typerepr='String'))
                (string_literal_expr type='(_builtinStringLiteral: Builtin.RawPointer, utf8CodeUnitCount: Builtin.Word, isASCII: Builtin.Int1)' location=available-at.swift:3:8 range=[available-at.swift:3:8 - line:3:8] encoding=utf8 value="TEST"))))))))
  (top_level_code_decl
    (brace_stmt
      (call_expr type='()' location=available-at.swift:6:1 range=[available-at.swift:6:1 - line:6:10] nothrow
        (declref_expr type='() -> ()' location=available-at.swift:6:1 range=[available-at.swift:6:1 - line:6:1] decl=main.(file).function()@available-at.swift:2:6 specialized=no)
        (tuple_expr type='()' location=available-at.swift:6:9 range=[available-at.swift:6:9 - line:6:10])))))