crayon: Misbehaving HandleLike implementation can lead to memory safety violation
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Unsafe code in
ObjectPoolhas time-of-check to time-of-use (TOCTOU) bug that can eventually lead to a memory safety violation.ObjectPoolandHandlePoolimplicitly assumes thatHandleLiketrait methods are pure, i.e., they always return the same value. However, this assumption is unsound sinceHandleLikeis a safe, public trait that allows a custom implementation.Original issue report: shawnscode/crayon#87