How to Implement Async Drop in Rust

Async
2026-04-17T12:05:42+00:00
Async Drop is impossible in Rust because the Drop trait requires synchronous execution for immediate resource cleanup.

You cannot implement async Drop in Rust because the Drop trait does not support async methods. The Drop trait requires synchronous execution to ensure resources are cleaned up immediately when a value goes out of scope, and making it asynchronous would create deadlocks and undefined behavior in the runtime. You must perform cleanup logic synchronously inside the drop method or use a wrapper pattern that triggers cleanup before the value is dropped.

use std::ops::Drop;

struct Resource {
    // fields
}

impl Drop for Resource {
    fn drop(&mut self) {
        // Perform synchronous cleanup here
        // No async/await allowed
    }
}