dtolnay/anyhow

Health v2 · maintenance only

Adoption not part of the score

6631 stars · 221 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A Rust library providing anyhow::Error, a trait-object-based concrete error type for idiomatic error handling in applications. It supports easy error propagation with ?, context attachment, downcasting, and optional backtrace capture.

Use cases

• handle errors in a Rust application without defining custom error types
• propagate errors with the ? operator across fallible functions
• add human-readable context to low-level errors like IO failures
• downcast errors to underlying concrete error types
• capture and print backtraces for errors
• simplify error handling in application code rather than library code

When to choose

• you are building a Rust application and want ergonomic error handling
• you want a single concrete error type instead of custom error enums
• you need to attach context messages to errors as they bubble up
• you want backtrace support with minimal boilerplate

When to avoid

• you are writing a public library where callers need to match on specific error variants
• you need structured, typed error enums for programmatic error handling
• you need no_std or embedded support

Facets

library · maturity stable

error-handling developer-tools programming-languages rust error-type rust-library result backtrace error-context

Member repositories

For agents

markdown · JSON · MCP: product_card(name="dtolnay/anyhow")