error[E0597]: `x` does not live long enough
  --> $DIR/issue-52534.rs:22:14
   |
LL |     foo(|a| &x)
   |          -   ^ `x` would have to be valid for `'0`...
   |          |
   |          has type `&'0 u32`
LL | }
   | - ...but `x` will be dropped here, when the function `bar` returns
   |
   = note: functions cannot return a borrow to data owned within the function's scope, functions can only return borrows to data passed as arguments
   = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch04-02-references-and-borrowing.html#dangling-references>

error[E0597]: `y` does not live long enough
  --> $DIR/issue-52534.rs:27:26
   |
LL |     baz(|first, second| &y)
   |          -----           ^ `y` would have to be valid for `'0`...
   |          |
   |          has type `&'0 u32`
LL | }
   | - ...but `y` will be dropped here, when the function `foobar` returns
   |
   = note: functions cannot return a borrow to data owned within the function's scope, functions can only return borrows to data passed as arguments
   = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch04-02-references-and-borrowing.html#dangling-references>

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0597`.