15
submitted 20 hours ago by Ephera@lemmy.ml to c/rust@lemmy.ml

Always had the problem that if I wanted to just log an error, rather than bubble it all the way up to main(), that you wouldn't get a stacktrace. You could iterate the source chain and plug the stacktrace together yourself, but it's rather complex code.

Now I realized, you can do this to get a stacktrace:

let error = todo!("Get an error somehow...");
let error = anyhow::anyhow!(error); //converts to an `anyhow::Error`
eprintln!("Error with stacktrace: {error:?}");

For converting to an anyhow::Error, it often also makes sense to use anyhow::Context like so:

use anyhow::Context;
let error = error.context("Deleting file failed.");
you are viewing a single comment's thread
view the rest of the comments
[-] Ephera@lemmy.ml 2 points 9 hours ago

Ah yeah, I was thinking of the "Caused by" shenanigans, which it prints in addition to the stacktrace.

this post was submitted on 20 Mar 2026
15 points (100.0% liked)

Rust Programming

9198 readers
51 users here now

founded 7 years ago
MODERATORS