*const as *mut compiles but *const as *const does not

· Users Rust Lang · Aug. 22, 2026, 9:24 p.m.
Rust Programming Type Casting Compiler Bugs programming-languages
Summary
The blog post discusses a potential bug in Rust's type casting, specifically that `*const` can be cast as `*mut`, while `*const` cannot be cast as `*const` for different trait-object-unsized types, highlighting inconsistencies in compiler behavior.
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