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+## Changes in version 0.6.4.0
+
+ * Introduce `Data.Primitive.PrimArray`, which offers types and function
+   for dealing with a `ByteArray` tagged with a phantom type variable for
+   tracking the element type.
+
+ * Implement `isByteArrayPinned` and `isMutableByteArrayPinned`.
+
+ * Add `Eq1`, `Ord1`, `Show1`, and `Read1` instances for `Array` and
+   `SmallArray`.
+
+ * Improve the test suite. This includes having property tests for
+   typeclasses from `base` such as `Eq`, `Ord`, `Functor`, `Applicative`,
+   `Monad`, `IsList`, `Monoid`, `Foldable`, and `Traversable`.
+
+ * Fix the broken `IsList` instance for `ByteArray`. The old definition
+   would allocate a byte array of the correct size and then leave the
+   memory unitialized instead of writing the list elements to it.
+
+ * Fix the broken `Functor` instance for `Array`. The old definition
+   would allocate an array of the correct size with thunks for erroring
+   installed at every index. It failed to replace these thunks with
+   the result of the function applied to the elements of the argument array.
+
+ * Fix the broken `Applicative` instances of `Array` and `SmallArray`.
+   The old implementation of `<*>` for `Array` failed to initialize
+   some elements but correctly initialized others in the resulting
+   `Array`. It is unclear what the old behavior of `<*>` was for
+   `SmallArray`, but it was incorrect.
+
+ * Fix the broken `Monad` instances for `Array` and `SmallArray`.
+
+ * Fix the implementation of `foldl1` in the `Foldable` instances for
+   `Array` and `SmallArray`. In both cases, the old implementation
+   simply returned the first element of the array and made no use of
+   the other elements in the array.
+
+ * Fix the implementation of `mconcat` in the `Monoid` instance for
+   `SmallArray`.
+ 
+ * Implement `Data.Primitive.Ptr`, implementations of `Ptr` functions
+   that require a `Prim` constraint instead of a `Storable` constraint.
+
+
+ * Add `PrimUnlifted` instances for `TVar` and `MVar`.
+
+ * Use `compareByteArrays#` for the `Eq` and `Ord` instances of
+   `ByteArray` when building with GHC 8.4 and newer.
+
+ * Add `Prim` instances for lots of types in `Foreign.C.Types` and
+   `System.Posix.Types`.
+
+ * Reexport `Data.Primitive.SmallArray` and `Data.Primitive.UnliftedArray`
+   from `Data.Primitive`.
+
+ * Add fold functions and map function to `Data.Primitive.UnliftedArray`.
+   Add typeclass instances for `IsList`, `Ord`, and `Show`.
+
+ * Add `defaultSetByteArray#` and `defaultSetOffAddr#` to
+   `Data.Primitive.Types`.
+
+## Changes in version 0.6.3.0
+
+ * Add `PrimMonad` instances for `ContT`, `AccumT`, and `SelectT` from
+   `transformers`
+
+ * Add `Eq`, `Ord`, `Show`, and `IsList` instances for `ByteArray`
+
+ * Add `Semigroup` instances for `Array` and `SmallArray`. This allows
+   `primitive` to build on GHC 8.4 and later.
+
+## Changes in version 0.6.2.0
+
+ * Drop support for GHCs before 7.4
+
+ * `SmallArray` support
+
+ * `ArrayArray#` based support for more efficient arrays of unlifted pointer types
+
+ * Make `Array` and the like instances of various classes for convenient use
+
+ * Add `Prim` instances for Ptr and FunPtr
+
+ * Add `ioToPrim`, `stToPrim` and unsafe counterparts for situations that would
+   otherwise require type ascriptions on `primToPrim`
+
+ * Add `evalPrim`
+
+ * Add `PrimBase` instance for `IdentityT`
+
+## Changes in version 0.6.1.0
+
+ * Use more appropriate types in internal memset functions, which prevents
+   overflows/segfaults on 64-bit systems.
+
+ * Fixed a warning on GHC 7.10
+
+ * Worked around a -dcore-lint bug in GHC 7.6/7.7
+
+## Changes in version 0.6
+
+ * Split PrimMonad into two classes to allow automatic lifting of primitive
+   operations into monad transformers. The `internal` operation has moved to the
+   `PrimBase` class.
+
+ * Fixed the test suite on older GHCs
+
+## Changes in version 0.5.4.0
+
+ * Changed primitive_ to work around an oddity with GHC's code generation
+   on certain versions that led to side effects not happening when used
+   in conjunction with certain very unsafe IO performers.
+
+ * Allow primitive to build on GHC 7.9
+
+## Changes in version 0.5.3.0
+
+ * Implement `cloneArray` and `cloneMutableArray` primitives
+   (with fall-back implementations for GHCs prior to version 7.2.1)
+
+## Changes in version 0.5.2.1
+
+ * Add strict variants of `MutVar` modification functions
+   `atomicModifyMutVar'` and `modifyMutVar'`
+
+ * Fix compilation on Solaris 10 with GNU C 3.4.3
+
+## Changes in version 0.5.1.0
+
+ * Add support for GHC 7.7's new primitive `Bool` representation
+
+## Changes in version 0.5.0.1
+
+ * Disable array copying primitives for GHC 7.6.* and earlier
+
+## Changes in version 0.5
+
+ * New in `Data.Primitive.MutVar`: `atomicModifyMutVar`
+
+ * Efficient block fill operations: `setByteArray`, `setAddr`
+
+## Changes in version 0.4.1
+
+ * New module `Data.Primitive.MutVar`
+
+## Changes in version 0.4.0.1
+
+ * Critical bug fix in `fillByteArray`
+
+## Changes in version 0.4
+
+ * Support for GHC 7.2 array copying primitives
+
+ * New in `Data.Primitive.ByteArray`: `copyByteArray`,
+   `copyMutableByteArray`, `moveByteArray`, `fillByteArray`
+
+ * Deprecated in `Data.Primitive.ByteArray`: `memcpyByteArray`,
+   `memcpyByteArray'`, `memmoveByteArray`, `memsetByteArray`
+
+ * New in `Data.Primitive.Array`: `copyArray`, `copyMutableByteArray`
+
+ * New in `Data.Primitive.Addr`: `copyAddr`, `moveAddr`
+
+ * Deprecated in `Data.Primitive.Addr`: `memcpyAddr`