https://errorvault.dev/tags/coercion/Recent content in Coercion on ErrorVault — Developer Error Code DictionaryHugoen-usSun, 26 Apr 2026 05:32:04 +0800https://errorvault.dev/rust/rust-e0067-illegal-erase-coercion/Sun, 26 Apr 2026 05:32:04 +0800https://errorvault.dev/rust/rust-e0067-illegal-erase-coercion/<h1 id="fix-e0067-illegal-erase-coercion">Fix E0067: illegal erase coercion</h1> <p>Error <code>E0067</code> is a Rust compiler error that signals an attempt to perform an illegal &ldquo;erase&rdquo; coercion. In Rust&rsquo;s type system, certain type conversions are allowed implicitly (coercions), but others are not. This error occurs when you try to erase a lifetime or otherwise remove type information in a way that Rust&rsquo;s coercion system does not permit.</p> <h2 id="1-symptoms">1. Symptoms</h2> <h2 id="when-e0067-occurs-you-will-see-output-similar-to-this">When <code>E0067</code> occurs, you will see output similar to this:</h2> <p>error[E0067]: illegal erase coercion &ndash;&gt; src/main.rs:10:12 | 10 | let g: fn() = f; | ^^^^ | = note: this error was previously described as &ldquo;illegal erase coercion&rdquo;</p>