Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu/usercode/main.swift:1:15: error: use of undeclared type 'int' func bar(foo: int) { ^~~ /usercode/main.swift:2:21: error: use of undeclared type 'int' func inner(arg: int = foo) {} ^~~