Re:Rust: Dropping heavy things in another thread can make yo...
by rcxdude on Saturday May 30, 2020 @05:35PM
(#23364974)
There's also no guarantee the object won't be moved elsewhere, including into a context which never gets freed (for example, you can construct mem::forget using entirely safe code by forming a cycle of reference-counted boxes). That said, Rust has support for such a concept through the Pin trait (which essentially guarantees an object will not get moved until it is 'Unpinned').
Yes and no. Whenever control leaves a code block, Rust automatically calls the drop() method of all values still owned by that block. There is no guarantee that control will exit every block (cf. Turing), but a moderately exceptional circumstance needs to occur for this not to happen, like an infinite loop.