mirror of
https://github.com/alrayyes/wiki.git
synced 2024-11-23 03:56:23 +00:00
33 lines
1 KiB
Markdown
33 lines
1 KiB
Markdown
---
|
|
id: 2a1d0b2f-9f23-4872-a83f-aa01a84756b5
|
|
title: Rust Unrecoverable Errors
|
|
---
|
|
|
|
# Unwinding vs Aborting
|
|
|
|
By default, when a panic occurs, the program starts *unwinding*, which
|
|
means Rust walks back up the stack and cleans up the data from each
|
|
function it encounters. But this walking back and cleanup is a lot of
|
|
work. The alternative is to immediately abort, which ends the program
|
|
without cleaning up. Memory that the program was using will then need to
|
|
be cleaned up by the operating system. If in your project you need to
|
|
make the resulting binary as small as possible, you can switch from
|
|
unwinding to aborting upon a panic by adding `panic = 'abort'` to the
|
|
appropriate `[profile]` sections in your *Cargo.toml* file. For example,
|
|
if you want to abort on panic in release mode, add this:
|
|
|
|
``` toml
|
|
[profile.release]
|
|
panic = 'abort'
|
|
```
|
|
|
|
# panic!
|
|
|
|
When doodie hits the fan and there's no way out, use the
|
|
[panic!](https://doc.rust-lang.org/std/macro.panic.html) macro:
|
|
|
|
``` rust
|
|
fn main() {
|
|
panic!("crash and burn");
|
|
}
|
|
```
|