error[E0515]: cannot return reference to temporary value
  --> $DIR/darwin-objc-bad-ref.rs:12:5
   |
LL |     &objc::class!("NSObject")
   |     ^------------------------
   |     ||
   |     |temporary value created here
   |     returns a reference to data owned by the current function

error[E0515]: cannot return reference to temporary value
  --> $DIR/darwin-objc-bad-ref.rs:17:5
   |
LL |     &objc::class!("NSObject")
   |     ^------------------------
   |     ||
   |     |temporary value created here
   |     returns a reference to data owned by the current function

error[E0515]: cannot return reference to temporary value
  --> $DIR/darwin-objc-bad-ref.rs:22:5
   |
LL |     &objc::selector!("alloc")
   |     ^------------------------
   |     ||
   |     |temporary value created here
   |     returns a reference to data owned by the current function

error[E0515]: cannot return reference to temporary value
  --> $DIR/darwin-objc-bad-ref.rs:27:5
   |
LL |     &objc::selector!("alloc")
   |     ^------------------------
   |     ||
   |     |temporary value created here
   |     returns a reference to data owned by the current function

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0515`.