| error[E0303]: pattern bindings are not allowed after an `@` |
| --> $DIR/pattern-bindings-after-at.rs:8:31 |
| | |
| LL | ref mut z @ &mut Some(ref a) => { |
| | ^^^^^ not allowed after `@` |
| |
| warning[E0502]: cannot borrow `_` as immutable because it is also borrowed as mutable |
| --> $DIR/pattern-bindings-after-at.rs:8:31 |
| | |
| LL | ref mut z @ &mut Some(ref a) => { |
| | ----------------------^^^^^- |
| | | | |
| | | immutable borrow occurs here |
| | mutable borrow occurs here |
| ... |
| LL | **z = None; |
| | ---------- mutable borrow later used here |
| | |
| = warning: this error has been downgraded to a warning for backwards compatibility with previous releases |
| = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future |
| = note: for more information, try `rustc --explain E0729` |
| |
| error: aborting due to previous error |
| |
| Some errors have detailed explanations: E0303, E0502. |
| For more information about an error, try `rustc --explain E0303`. |