error[E0716]: temporary value dropped while borrowed --> $DIR/issue-52049.rs:6:10 | LL | foo(&unpromotable(5u32)); | -----^^^^^^^^^^^^^^^^^^- | | | | | creates a temporary value which is freed while still in use | argument requires that borrow lasts for `'static` LL | } | - temporary value is freed at the end of this statement error: aborting due to previous error For more information about this error, try `rustc --explain E0716`.