dtolnay/no-panic

Health v2 · maintenance only

Adoption not part of the score

1214 stars · 20 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A Rust attribute macro that makes the compiler prove at link time that a marked function can never panic, failing compilation with a linker error naming the offending function otherwise. It is a lightweight proc-macro crate published on crates.io by dtolnay.

Use cases

• guarantee a function cannot panic in Rust
• catch potential panics at compile time
• verify no-panic safety of parsing or slicing code
• hardening embedded or safety-critical Rust code
• detect panics in release builds via linker errors

When to choose

• you need static, link-time proof that specific Rust functions are panic-free
• you are building release binaries and can tolerate debug-mode compile issues
• your build uses panic = "unwind" and invokes a linker

When to avoid

• you rely on cargo check or library-only builds, which skip linking and thus panic detection
• your code is built with panic = "abort"
• you need const functions or debug-mode compilation of optimization-dependent functions

Facets

library · maturity stable

testing error-handling developer-tools developer-tools programming-languages performance rust cross-platform attribute-macro panic-detection link-time-verification rust-proc-macro

Member repositories

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