| error[E0515]: cannot return value referencing temporary value | 
 |   --> $DIR/promote-ref-mut-in-let-issue-46557.rs:6:5 | 
 |    | | 
 | LL |     let ref mut x = 1234543; | 
 |    |                     ------- temporary value created here | 
 | LL |     x | 
 |    |     ^ returns a value referencing data owned by the current function | 
 |  | 
 | error[E0515]: cannot return value referencing temporary value | 
 |   --> $DIR/promote-ref-mut-in-let-issue-46557.rs:11:5 | 
 |    | | 
 | LL |     let (ref mut x, ) = (1234543, ); | 
 |    |                         ----------- temporary value created here | 
 | LL |     x | 
 |    |     ^ returns a value referencing data owned by the current function | 
 |  | 
 | error[E0515]: cannot return value referencing temporary value | 
 |   --> $DIR/promote-ref-mut-in-let-issue-46557.rs:15:5 | 
 |    | | 
 | LL |       match 1234543 { | 
 |    |       ^     ------- temporary value created here | 
 |    |  _____| | 
 |    | | | 
 | LL | |         ref mut x => x | 
 | LL | |     } | 
 |    | |_____^ returns a value referencing data owned by the current function | 
 |  | 
 | error[E0515]: cannot return value referencing temporary value | 
 |   --> $DIR/promote-ref-mut-in-let-issue-46557.rs:21:5 | 
 |    | | 
 | LL |       match (123443,) { | 
 |    |       ^     --------- temporary value created here | 
 |    |  _____| | 
 |    | | | 
 | LL | |         (ref mut x,) => x, | 
 | LL | |     } | 
 |    | |_____^ returns a value referencing data owned by the current function | 
 |  | 
 | error[E0515]: cannot return reference to temporary value | 
 |   --> $DIR/promote-ref-mut-in-let-issue-46557.rs:27:5 | 
 |    | | 
 | LL |     &mut 1234543 | 
 |    |     ^^^^^------- | 
 |    |     |    | | 
 |    |     |    temporary value created here | 
 |    |     returns a reference to data owned by the current function | 
 |  | 
 | error: aborting due to 5 previous errors | 
 |  | 
 | For more information about this error, try `rustc --explain E0515`. |