| error[E0594]: cannot assign to `self.0`, which is behind a `&` reference | |
| --> $DIR/issue-68049-1.rs:7:9 | |
| | | |
| LL | unsafe fn alloc(&self, _layout: Layout) -> *mut u8 { | |
| | ----- this is an immutable reference | |
| LL | self.0 += 1; | |
| | ^^^^^^^^^^^ `self` is a `&` reference, so the data it refers to cannot be written | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0594`. |