0.9.5

What's Changed

• rand v0.9.5: backport #1790 by @dhardy in #1803

Full Changelog: 0.9.4...0.9.5

0.8.7

What's Changed

• rand v0.8.7: backport #1790 by @dhardy in #1804

Full Changelog: 0.8.6...0.8.7

0.10.2

Fixes

• Fix possible memory safety violation due to deserialization of UniformChar from bad source (#1790)

Changes

• Document required output order of fn partial_shuffle and apply #[must_use] (#1769)
• Avoid usage of unsafe in contexts where non-local memory corruption could invalidate contract (#1791)

Full Changelog: 0.10.1...0.10.2

0.8.6

What's Changed

This release back-ports a fix from v0.10. See also #1763.

Changes

• Deprecate feature log (#1772)

• Drop the experimental simd_support feature.

New Contributors

• @nwalfield made their first contribution in #1772

Full Changelog: 0.8.5...0.8.6

0.9.4

Fixes

• Fix doc build (#1766)

Full Changelog: 0.9.3...0.9.4

0.10.1

This release includes a fix for a soundness bug; see #1763.

Changes

• Document panic behavior of make_rng and add #[track_caller] (#1761)
• Deprecate feature log (#1763)

Full Changelog: 0.10.0...0.10.1

0.9.3

This release back-ports a fix from v0.10. See also [#1763].

Changes

• Deprecate feature log (#1764)
• Replace usages of doc_auto_cfg (#1764)

Full Changelog: 0.9.2...0.9.3

0.10.0

[0.10.0] - 2026-02-08

Changes

• The dependency on rand_chacha has been replaced with a dependency on chacha20. This changes the implementation behind StdRng, but the output remains the same. There may be some API breakage when using the ChaCha-types directly as these are now the ones in chacha20 instead of rand_chacha (#1642).
• Rename fns IndexedRandom::choose_multiple -> sample, choose_multiple_array -> sample_array, choose_multiple_weighted -> sample_weighted, struct SliceChooseIter -> IndexedSamples and fns IteratorRandom::choose_multiple -> sample, choose_multiple_fill -> sample_fill (#1632)
• Use Edition 2024 and MSRV 1.85 (#1653)
• Let Fill be implemented for element types, not sliceable types (#1652)
• Fix OsError::raw_os_error on UEFI targets by returning Option<usize> (#1665)
• Replace fn TryRngCore::read_adapter(..) -> RngReadAdapter with simpler struct RngReader (#1669)
• Remove fns SeedableRng::from_os_rng, try_from_os_rng (#1674)
• Remove Clone support for StdRng, ReseedingRng (#1677)
• Use postcard instead of bincode to test the serde feature (#1693)
• Avoid excessive allocation in IteratorRandom::sample when amount is much larger than iterator size (#1695)
• Rename os_rng -> sys_rng, OsRng -> SysRng, OsError -> SysError (#1697)
• Rename Rng -> RngExt as upstream rand_core has renamed RngCore -> Rng (#1717)

Additions

• Add fns IndexedRandom::choose_iter, choose_weighted_iter (#1632)
• Pub export Xoshiro128PlusPlus, Xoshiro256PlusPlus prngs (#1649)
• Pub export ChaCha8Rng, ChaCha12Rng, ChaCha20Rng behind chacha feature (#1659)
• Fn rand::make_rng() -> R where R: SeedableRng (#1734)

Removals

• Removed ReseedingRng (#1722)
• Removed unused feature "nightly" (#1732)
• Removed feature small_rng (#1732)

New Contributors

• @hpenne made their first contribution in #1642
• @usamoi made their first contribution in #1665
• @allan2 made their first contribution in #1680
• @tarcieri made their first contribution in #1683
• @valadaptive made their first contribution in #1693
• @stepancheg made their first contribution in #1695

Full Changelog: 0.9.2...0.10.0

0.9.2

Deprecated

• Deprecate rand::rngs::mock module and StepRng generator (#1634)

Additions

• Enable WeightedIndex<usize> (de)serialization (#1646)

Full Changelog: 0.9.1...0.9.2

rand v0.9.1

Changelog

Security and unsafe

• Revise "not a crypto library" policy again (#1565)
• Remove zerocopy dependency from rand (#1579)

Fixes

• Fix feature simd_support for recent nightly rust (#1586)

Changes

• Allow fn rand::seq::index::sample_weighted and fn IndexedRandom::choose_multiple_weighted to return fewer than amount results (#1623), reverting an undocumented change (#1382) to the previous release.

Additions

• Add rand::distr::Alphabetic distribution. (#1587)
• Re-export rand_core (#1604)

New Contributors

• @yttersian made their first contribution in #1567
• @sorairolake made their first contribution in #1583
• @1Git2Clone made their first contribution in #1587
• @baloo made their first contribution in #1589
• @fjarri made their first contribution in #1593
• @Raymi306 made their first contribution in #1616
• @hashcatHitman made their first contribution in #1627

Full Changelog: 0.9.0...0.9.1