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-# Changelog
-
-## Unreleased
-
-- 
-
-## 1.19.0
-
-- Use `portable-atomic` instead of `atomic-polyfill`, [#251](https://github.com/matklad/once_cell/pull/251).
-
-## 1.18.0
-
-- `MSRV` is updated to 1.60.0 to take advantage of `dep:` syntax for cargo features,
-  removing "implementation details" from publicly visible surface.
-
-## 1.17.2
-
-- Avoid unnecessary synchronization in `Lazy::{force,deref}_mut()`, [#231](https://github.com/matklad/once_cell/pull/231).
-
-## 1.17.1
-
-- Make `OnceRef` implementation compliant with [strict provenance](https://github.com/rust-lang/rust/issues/95228).
-
-## 1.17.0
-
-- Add `race::OnceRef` for storing a `&'a T`.
-
-## 1.16.0
-
-- Add `no_std` implementation based on `critical-section`,
-  [#195](https://github.com/matklad/once_cell/pull/195).
-- Deprecate `atomic-polyfill` feature (use the new `critical-section` instead)
-
-## 1.15.0
-
-- Increase minimal supported Rust version to 1.56.0.
-- Implement `UnwindSafe` even if the `std` feature is disabled.
-
-## 1.14.0
-
-- Add extension to `unsync` and `sync` `Lazy` mut API:
-  - `force_mut`
-  - `get_mut`
-
-
-## 1.13.1
-
-- Make implementation compliant with [strict provenance](https://github.com/rust-lang/rust/issues/95228).
-- Upgrade `atomic-polyfill` to `1.0`
-
-## 1.13.0
-
-- Add `Lazy::get`, similar to `OnceCell::get`.
-
-## 1.12.1
-
-- Remove incorrect `debug_assert`.
-
-## 1.12.0
-
-- Add `OnceCell::wait`, a blocking variant of `get`.
-
-## 1.11.0
-
-- Add `OnceCell::with_value` to create initialized `OnceCell` in `const` context.
-- Improve `Clone` implementation for `OnceCell`.
-- Rewrite `parking_lot` version on top of `parking_lot_core`, for even smaller cells!
-
-## 1.10.0
-
-- upgrade `parking_lot` to `0.12.0` (note that this bumps MSRV with `parking_lot` feature enabled to `1.49.0`).
-
-## 1.9.0
-
-- Added an `atomic-polyfill` optional dependency to compile `race` on platforms without atomics
-
-## 1.8.0
-
-- Add `try_insert` API -- a version of `set` that returns a reference.
-
-## 1.7.2
-
-- Improve code size when using parking_lot feature.
-
-## 1.7.1
-
-- Fix `race::OnceBox<T>` to also impl `Default` even if `T` doesn't impl `Default`.
-
-## 1.7.0
-
-- Hide the `race` module behind (default) `race` feature.
-  Turns out that adding `race` by default was a breaking change on some platforms without atomics.
-  In this release, we make the module opt-out.
-  Technically, this is a breaking change for those who use `race` with `no_default_features`.
-  Given that the `race` module itself only several days old, the breakage is deemed acceptable.
-
-## 1.6.0
-
-- Add `Lazy::into_value`
-- Stabilize `once_cell::race` module for "first one wins" no_std-compatible initialization flavor.
-- Migrate from deprecated `compare_and_swap` to `compare_exchange`.
-
-## 1.5.2
-
-- `OnceBox` API uses `Box<T>`.
-  This a breaking change to unstable API.
-
-## 1.5.1
-
-- MSRV is increased to `1.36.0`.
-- document `once_cell::race` module.
-- introduce `alloc` feature for `OnceBox`.
-- fix `OnceBox::set`.
-
-## 1.5.0
-
-- add new `once_cell::race` module for "first one wins" no_std-compatible initialization flavor.
-  The API is provisional, subject to change and is gated by the `unstable` cargo feature.
-
-## 1.4.1
-
-- upgrade `parking_lot` to `0.11.0`
-- make `sync::OnceCell<T>` pass https://doc.rust-lang.org/nomicon/dropck.html#an-escape-hatch[dropck] with `parking_lot` feature enabled.
-  This fixes a (minor) semver-incompatible changed introduced in `1.4.0`
-
-## 1.4.0
-
-- upgrade `parking_lot` to `0.10` (note that this bumps MSRV with `parking_lot` feature enabled to `1.36.0`).
-- add `OnceCell::take`.
-- upgrade crossbeam utils (private dependency) to `0.7`.
-
-## 1.3.1
-
-- remove unnecessary `F: fmt::Debug` bound from `impl fmt::Debug for Lazy<T, F>`.
-
-## 1.3.0
-
-- `Lazy<T>` now implements `DerefMut`.
-- update implementation according to the latest changes in `std`.
-
-## 1.2.0
-
-- add `sync::OnceCell::get_unchecked`.
-
-## 1.1.0
-
-- implement `Default` for `Lazy`: it creates an empty `Lazy<T>` which is initialized with `T::default` on first access.
-- add `OnceCell::get_mut`.
-
-## 1.0.2
-
-- actually add `#![no_std]` attribute if std feature is not enabled.
-
-## 1.0.1
-
-- fix unsoundness in `Lazy<T>` if the initializing function panics. Thanks [@xfix](https://github.com/xfix)!
-- implement `RefUnwindSafe` for `Lazy`.
-- share more code between `std` and `parking_lot` implementations.
-- add F.A.Q section to the docs.
-
-## 1.0.0
-
-- remove `parking_lot` from the list of default features.
-- add `std` default feature. Without `std`, only `unsync` module is supported.
-- implement `Eq` for `OnceCell`.
-- fix wrong `Sync` bound on `sync::Lazy`.
-- run the whole test suite with miri.
-
-## 0.2.7
-
-- New implementation of `sync::OnceCell` if `parking_lot` feature is disabled.
-  It now employs a hand-rolled variant of `std::sync::Once`.
-- `sync::OnceCell::get_or_try_init` works without `parking_lot` as well!
-- document the effects of `parking_lot` feature: same performance but smaller types.
-
-## 0.2.6
-
-- Updated `Lazy`'s `Deref` impl to requires only `FnOnce` instead of `Fn`
-
-## 0.2.5
-
-- `Lazy` requires only `FnOnce` instead of `Fn`
-
-## 0.2.4
-
-- nicer `fmt::Debug` implementation
-
-## 0.2.3
-
-- update `parking_lot` to `0.9.0`
-- fix stacked borrows violation in `unsync::OnceCell::get`
-- implement `Clone` for `sync::OnceCell<T> where T: Clone`
-
-## 0.2.2
-
-- add `OnceCell::into_inner` which consumes a cell and returns an option
-
-## 0.2.1
-
-- implement `sync::OnceCell::get_or_try_init` if `parking_lot` feature is enabled
-- switch internal `unsafe` implementation of `sync::OnceCell` from `Once` to `Mutex`
-- `sync::OnceCell::get_or_init` is twice as fast if cell is already initialized
-- implement `std::panic::RefUnwindSafe` and `std::panic::UnwindSafe` for `OnceCell`
-- better document behavior around panics
-
-## 0.2.0
-
-- MSRV is now 1.31.1
-- `Lazy::new` and `OnceCell::new` are now const-fns
-- `unsync_lazy` and `sync_lazy` macros are removed
-
-## 0.1.8
-
-- update crossbeam-utils to 0.6
-- enable bors-ng
-
-## 0.1.7
-
-- cells implement `PartialEq` and `From`
-- MSRV is down to 1.24.1
-- update `parking_lot` to `0.7.1`
-
-## 0.1.6
-
-- `unsync::OnceCell<T>` is `Clone` if `T` is `Clone`.
-
-## 0.1.5
-
-- No changelog until this point :(