Re:Welcome to Comprehensive Rust
by pkolaczk on Thursday December 22, 2022 @07:53AM
(#34092781)
It does not guarantee, but it is actually quite hard to cause a memory leak by accident, because at the same time Rust makes creating cycles hard.
[ Parent
| on HN ]
I actually haven't tried this... do you know off the top of your head what it takes to make a cycle with Rc?
It should not be possible with normal borrows (and safe Rust) since they're statically checked to be acyclic.
The Rust Book has an example: https://doc.rust-lang.org/book/ch15-06-reference-cycles.html
Of course, leaking memory is as easy as using `Box::leak`, although that's probably never going to happen accidentally.
Re:Welcome to Comprehensive Rust
by britneybitch on Thursday December 22, 2022 @08:27AM
(#34092982)
You could store a `RefCell<Option<T>>` in an `Rc` and set it to `Some(rc)` after creation.
Or you could use the recently-stabilized `new_cyclic` method: https://doc.rust-lang.org/std/rc/struct.Rc.html#method.new_c...
Re:Welcome to Comprehensive Rust
by bitexploder on Thursday December 22, 2022 @08:36AM
(#34093044)
And when using C libraries / FFI, there are a lot of tricky things going in, it is much easier to leak in unsafe land.