| error[E0597]: `*a` does not live long enough |
| --> $DIR/destructor-restrictions.rs:8:10 |
| | |
| LL | let a = Box::new(RefCell::new(4)); |
| | - binding `a` declared here |
| LL | *a.borrow() + 1 |
| | ^--------- |
| | | |
| | borrowed value does not live long enough |
| | a temporary with access to the borrow is created here ... |
| LL | }; |
| | -- ... and the borrow might be used here, when that temporary is dropped and runs the destructor for type `Ref<'_, i32>` |
| | | |
| | `*a` dropped here while still borrowed |
| | |
| = note: the temporary is part of an expression at the end of a block; |
| consider forcing this temporary to be dropped sooner, before the block's local variables are dropped |
| help: for example, you could save the expression's value in a new local variable `x` and then make `x` be the expression at the end of the block |
| | |
| LL | let x = *a.borrow() + 1; x |
| | +++++++ +++ |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0597`. |
