error[E0716]: temporary value dropped while borrowed
  --> $DIR/dont_promote_unstable_const_fn_cross_crate.rs:8:28
   |
LL |     let _: &'static u32 = &foo();
   |            ------------    ^^^^^ creates a temporary value which is freed while still in use
   |            |
   |            type annotation requires that borrow lasts for `'static`
LL |     let _x: &'static u32 = &foo();
LL | }
   | - temporary value is freed at the end of this statement

error[E0716]: temporary value dropped while borrowed
  --> $DIR/dont_promote_unstable_const_fn_cross_crate.rs:9:29
   |
LL |     let _x: &'static u32 = &foo();
   |             ------------    ^^^^^ creates a temporary value which is freed while still in use
   |             |
   |             type annotation requires that borrow lasts for `'static`
LL | }
   | - temporary value is freed at the end of this statement

error: aborting due to 2 previous errors

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