Catching the Stack Unwinding

By default, a panic will cause the stack to unwind. The unwinding can be caught:

fn main() {
use std::panic;

let result = panic::catch_unwind(|| {

let result = panic::catch_unwind(|| {
    panic!("oh no!");
  • This can be useful in servers which should keep running even if a single request crashes.
  • This does not work if panic = 'abort' is set in your Cargo.toml.