Compile-Time Evaluation

2 articles

Fix E0493: Destructor Cannot Be Called in Constant Function

Rust intermediate Linux macOS Windows WebAssembly Aug 8, 2026

Rust compiler error E0493 occurs when attempting to call a destructor (Drop trait) within a constant function or const evaluation context. This guide explains the root cause and provides comprehensive fixes.

Fix E0594: Attempted to Set a Constant with a Non-Constant Value

Rust intermediate Linux macOS Windows Jul 10, 2026

Rust compiler error E0594 occurs when you attempt to assign a non-constant expression to a constant, including any expression involving function calls, even if the function is const.