Rust type erasure

Any keys nothing that borrows. Its only impl is impl<T: 'static + ?Sized> Any for T, and the error for that bound lands on the caller, not on the map. Erase no more than the design needs; see the ladder.

Quoted rustc output comes from rustc 1.98.1, edition 2024, aarch64-apple-darwin. Quoted Miri output comes from Miri 0.1.0 on nightly 2026-05-15.

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