1 error[E0106]: missing lifetime specifier
2 --> $DIR/unboxed-closure-sugar-lifetime-elision.rs:36:35
4 LL | let _: Foo(&isize, &usize) -> &usize; //~ ERROR missing lifetime specifier
5 | ^ expected lifetime parameter
7 = help: this function's return type contains a borrowed value, but the signature does not say whether it is borrowed from argument 1 or argument 2
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0106`.