| 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`. |