Rust's derive macros for traits like Debug, Clone, and Display implicitly emit #[inline] hints, which typically benefits trivial implementations but can cause compilation bloat in deeply nested error hierarchies.
Background
This article reveals a subtle compiler behavior in Rust where derive macros automatically insert #[inline] hints into generated trait implementations, discovered through macro expansion analysis.
- Source
- Lobsters
- Published
- Oct 4, 2026 at 09:41 AM
- Score
- 6.0 / 10