vagrant@vagrant:~$ swift
Welcome to Swift version 2.2.1-dev (LLVM da67bff217, Clang 81d0486fb2, Swift 82adb8fc96). Type :help for assistance.
  1> import Foundation
/home/vagrant/swift-2.2.1-SNAPSHOT-2016-04-23-a-ubuntu15.10/usr/lib/lldb/clang/include/module.modulemap:1:8: error: redefinition of module '_Builtin_intrinsics'
module _Builtin_intrinsics [system] [extern_c] {
       ^
/home/vagrant/swift-2.2.1-SNAPSHOT-2016-04-23-a-ubuntu15.10/usr/lib/swift/clang/include/module.modulemap:1:8: note: previously defined here
module _Builtin_intrinsics [system] [extern_c] {
       ^
/home/vagrant/swift-2.2.1-SNAPSHOT-2016-04-23-a-ubuntu15.10/usr/lib/lldb/clang/include/module.modulemap:169:8: error: redefinition of module '_Builtin_stddef_max_align_t'
module _Builtin_stddef_max_align_t [system] [extern_c] {
       ^
/home/vagrant/swift-2.2.1-SNAPSHOT-2016-04-23-a-ubuntu15.10/usr/lib/swift/clang/include/module.modulemap:169:8: note: previously defined here
module _Builtin_stddef_max_align_t [system] [extern_c] {
       ^
repl.swift:1:8: error: no such module 'Foundation'
import Foundation
       ^