On: Dealing with Out-of-Memory Conditions in Rust

[Xylakant]

I’m fairly certain that this does not require solving the halting problem. Fundamentally, every line of code can be transformed to the underlying code constructs, and those could be checked for allocations. Doing this in an efficient manner is probably hard, but certainly not impossible

[umanwizard → Xylakant]

    fn maybe_alloc() -> Vec<usize> {
        if collatz_conjecture_is_true() {
            vec![42]
        } else {
            vec![]
        }
    }

    fn main() {
        let v = maybe_alloc(); // Does this allocate?
    }

[wtetzner → umanwizard]

You would just assume it does. Really you want to detect all places that might allocate.

[umanwizard → wtetzner]

You are right. It’s definitely possible if you accept false positives.