The safe function create ring buffer allocates a buffer using Vec::with capacity followed by set len, creating a Box<[T]> containing uninitialized memory.

This leads to undefined behavior when functions like write slices create typed slices (e.g., &mut [bool]) over the uninitialized memory, violating Rust's validity invariants. The issue has been confirmed using Miri.

Fixed in version 0.2.2 by using resize with to properly initialize the buffer with T::default(), adding a T: Default bound to ensure sound initialization.