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Update Rust crate rand to v0.9.0

Renovate Bot requested to merge renovate/rand-0.x into main

This MR contains the following updates:

Package Type Update Change
rand (source) dependencies minor 0.8 -> 0.9
rand (source) dependencies minor 0.8.5 -> 0.9.0

Release Notes

rust-random/rand (rand)

v0.9.0

Compare Source

Security and unsafe
  • Policy: "rand is not a crypto library" (#​1514)
  • Remove fork-protection from ReseedingRng and ThreadRng. Instead, it is recommended to call ThreadRng::reseed on fork. (#​1379)
  • Use zerocopy to replace some unsafe code (#​1349, #​1393, #​1446, #​1502)
Dependencies
Features
  • Support std feature without getrandom or rand_chacha (#​1354)
  • Enable feature small_rng by default (#​1455)
  • Remove implicit feature rand_chacha; use std_rng instead. (#​1473)
  • Rename feature serde1 to serde (#​1477)
  • Rename feature getrandom to os_rng (#​1537)
  • Add feature thread_rng (#​1547)
API changes: rand_core traits
  • Add fn RngCore::read_adapter implementing std::io::Read (#​1267)
  • Add trait CryptoBlockRng: BlockRngCore; make trait CryptoRng: RngCore (#​1273)
  • Add traits TryRngCore, TryCryptoRng (#​1424, #​1499)
  • Rename fn SeedableRng::from_rng -> try_from_rng and add infallible variant fn from_rng (#​1424)
  • Rename fn SeedableRng::from_entropy -> from_os_rng and add fallible variant fn try_from_os_rng (#​1424)
  • Add bounds Clone and AsRef to associated type SeedableRng::Seed (#​1491)
API changes: Rng trait and top-level fns
  • Rename fn rand::thread_rng() to rand::rng() and remove from the prelude (#​1506)
  • Remove fn rand::random() from the prelude (#​1506)
  • Add top-level fns random_iter, random_range, random_bool, random_ratio, fill (#​1488)
  • Re-introduce fn Rng::gen_iter as random_iter (#​1305, #​1500)
  • Rename fn Rng::gen to random to avoid conflict with the new gen keyword in Rust 2024 (#​1438)
  • Rename fns Rng::gen_range to random_range, gen_bool to random_bool, gen_ratio to random_ratio (#​1505)
  • Annotate panicking methods with #[track_caller] (#​1442, #​1447)
API changes: RNGs
  • Fix <SmallRng as SeedableRng>::Seed size to 256 bits (#​1455)
  • Remove first parameter (rng) of ReseedingRng::new (#​1533)
API changes: Sequences
  • Split trait SliceRandom into IndexedRandom, IndexedMutRandom, SliceRandom (#​1382)
  • Add IndexedRandom::choose_multiple_array, index::sample_array (#​1453, #​1469)
API changes: Distributions: renames
  • Rename module rand::distributions to rand::distr (#​1470)
  • Rename distribution Standard to StandardUniform (#​1526)
  • Move distr::Slice -> distr::slice::Choose, distr::EmptySlice -> distr::slice::Empty (#​1548)
  • Rename trait distr::DistString -> distr::SampleString (#​1548)
  • Rename distr::DistIter -> distr::Iter, distr::DistMap -> distr::Map (#​1548)
API changes: Distributions
  • Relax Sized bound on Distribution<T> for &D (#​1278)
  • Remove impl of Distribution<Option<T>> for StandardUniform (#​1526)
  • Let distribution StandardUniform support all NonZero* types (#​1332)
  • Fns {Uniform, UniformSampler}::{new, new_inclusive} return a Result (instead of potentially panicking) (#​1229)
  • Distribution Uniform implements TryFrom instead of From for ranges (#​1229)
  • Add UniformUsize (#​1487)
  • Remove support for generating isize and usize values with StandardUniform, Uniform (except via UniformUsize) and Fill and usage as a WeightedAliasIndex weight (#​1487)
  • Add impl DistString for distributions Slice<char> and Uniform<char> (#​1315)
  • Add fn Slice::num_choices (#​1402)
  • Add fn p() for distribution Bernoulli to access probability (#​1481)
API changes: Weighted distributions
  • Add pub module rand::distr::weighted, moving WeightedIndex there (#​1548)
  • Add trait weighted::Weight, allowing WeightedIndex to trap overflow (#​1353)
  • Add fns weight, weights, total_weight to distribution WeightedIndex (#​1420)
  • Rename enum WeightedError to weighted::Error, revising variants (#​1382) and mark as #[non_exhaustive] (#​1480)
API changes: SIMD
  • Switch to std::simd, expand SIMD & docs (#​1239)
Reproducibility-breaking changes
  • Make ReseedingRng::reseed discard remaining data from the last block generated (#​1379)
  • Change fn SmallRng::seed_from_u64 implementation (#​1203)
  • Allow UniformFloat::new samples and UniformFloat::sample_single to yield high (#​1462)
  • Fix portability of distribution Slice (#​1469)
  • Make Uniform for usize portable via UniformUsize (#​1487)
  • Fix IndexdRandom::choose_multiple_weighted for very small seeds and optimize for large input length / low memory (#​1530)
Reproducibility-breaking optimisations
  • Optimize fn sample_floyd, affecting output of rand::seq::index::sample and rand::seq::SliceRandom::choose_multiple (#​1277)
  • New, faster algorithms for IteratorRandom::choose and choose_stable (#​1268)
  • New, faster algorithms for SliceRandom::shuffle and partial_shuffle (#​1272)
  • Optimize distribution Uniform: use Canon's method (single sampling) / Lemire's method (distribution sampling) for faster sampling (breaks value stability; #​1287)
  • Optimize fn sample_single_inclusive for floats (+~20% perf) (#​1289)
Other optimisations
  • Improve SmallRng initialization performance (#​1482)
  • Optimise SIMD widening multiply (#​1247)
Other
Documentation
  • Improve ThreadRng related docs (#​1257)
  • Docs: enable experimental --generate-link-to-definition feature (#​1327)
  • Better doc of crate features, use doc_auto_cfg (#​1411, #​1450)

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