error[E0716]: temporary value dropped while borrowed
  --> $DIR/issue-17545.rs:17:10
   |
LL |         &id(()), //~ ERROR borrowed value does not live long enough
   |          ^^^^^^ creates a temporary which is freed while still in use
LL |     ));
   |       - temporary value is freed at the end of this statement
   |
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 15:12...
  --> $DIR/issue-17545.rs:15:12
   |
LL | pub fn foo<'a, F: Fn(&'a ())>(bar: F) {
   |            ^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0716`.