---
title: "Scoped Error in Rust"
url: https://daily.dev/posts/scoped-error-in-rust-wwq3iomnl
source_url: https://kanru.info/scoped-error
type: article
source: "Lobsters"
published: 2026-05-25T17:44:15.820Z
updated: 2026-05-25T17:44:41.329Z
tags: ["rust"]
reading_time: 6
upvotes: 6
comments: 1
language: en
---

> ## Documentation Index
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# Scoped Error in Rust

**[Lobsters](https://daily.dev/sources/lobsters)** · 6 min read · 6 upvotes · 1 comments

## Summary

A developer introduces the `scoped-error` Rust crate, motivated by dissatisfaction with existing error handling libraries like anyhow, thiserror, snafu, and exn. The core idea is wrapping fallible logic in an `expect_error()` closure that attaches context once per function boundary rather than at every call site. The crate type-erases inner errors into a boxed `Frame` type (capturing file location via `#[track_caller]`), produces readable tree-shaped error reports, and remains small enough to vendor directly. Comparisons with existing crates and code examples illustrate the ergonomic improvements.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://kanru.info/scoped-error>

## Community discussion

Top comments from developers on daily.dev.

**@ozoned** · 1 upvotes

> This feels like the try catch syntax, but with an implicit catch block.
>
>
> I see where they are going. Define the context once and automatically add it to the write returned.
>
>
> Perhaps a macro would be more fitting for function scoped context? If you have multiple contexts in one function, then maybe a procedural macro? But, that would give the same syntax as what they have now.
>
>
> It is an interesting problem with no clear concise solution at the moment.

## Similar posts on daily.dev

- [Stop Forwarding Errors, Start Designing Them](https://daily.dev/posts/stop-forwarding-errors-start-designing-them-llnspffx6) · Lobsters · 1 upvotes · 0 comments

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