build(deps): bump rand from 0.7.3 to 0.8.0

[dependabot-preview]

Bumps rand from 0.7.3 to 0.8.0.

Changelog

Sourced from rand's changelog.

[0.8.0] - 2020-12-18

Platform support

• The minimum supported Rust version is now 1.36 (#1011)
• getrandom updated to v0.2 (#1041)
• Remove wasm-bindgen and stdweb feature flags. For details of WASM support, see the getrandom documentation. (#948)
• ReadRng::next_u32 and next_u64 now use little-Endian conversion instead of native-Endian, affecting results on Big-Endian platforms (#1061)
• The nightly feature no longer implies the simd_support feature (#1048)
• Fix simd_support feature to work on current nightlies (#1056)

Rngs

• ThreadRng is no longer Copy to enable safe usage within thread-local destructors (#1035)
• gen_range(a, b) was replaced with gen_range(a..b). gen_range(a..=b) is also supported. Note that a and b can no longer be references or SIMD types. (#744, #1003)
• Replace AsByteSliceMut with Fill and add support for [bool], [char], [f32], [f64] (#940)
• Restrict rand::rngs::adapter to std (#1027; see also #928)
• StdRng: add new std_rng feature flag (enabled by default, but might need to be used if disabling default crate features) (#948)
• StdRng: Switch from ChaCha20 to ChaCha12 for better performance (#1028)
• SmallRng: Replace PCG algorithm with xoshiro{128,256}++ (#1038)

Sequences

• Add IteratorRandom::choose_stable as an alternative to choose which does not depend on size hints (#1057)
• Improve accuracy and performance of IteratorRandom::choose (#1059)
• Implement IntoIterator for IndexVec, replacing the into_iter method (#1007)
• Add value stability tests for seq module (#933)

Misc

• Support PartialEq and Eq for StdRng, SmallRng and StepRng (#979)
• Added a serde1 feature and added Serialize/Deserialize to UniformInt and WeightedIndex (#974)
• Drop some unsafe code (#962, #963, #1011)
• Reduce packaged crate size (#983)
• Migrate to GitHub Actions from Travis+AppVeyor (#1073)

Distributions

• Alphanumeric samples bytes instead of chars (#935)
• Uniform now supports char, enabling rng.gen_range('A'..='Z') (#1068)
• Add UniformSampler::sample_single_inclusive (#1003)

Weighted sampling

• Implement weighted sampling without replacement (#976, #1013)
• rand::distributions::alias_method::WeightedIndex was moved to rand_distr::WeightedAliasIndex. The simpler alternative rand::distribution::WeightedIndex remains. (#945)
• Improve treatment of rounding errors in WeightedIndex::update_weights (#956)
• WeightedIndex: return error on NaN instead of panic (#1005)

Documentation

• Document types supported by random (#994)

Commits

• 98a1aaf Merge pull request #1076 from dhardy/work
• 46082d5 Fix installation of multilib
• d109f18 Update changelog for rand v0.8
• cc93dae Merge pull request #1079 from JJPennington/master
• 9aa8bc1 Modified the StdRng documentation
• 34423a6 Use cp to create redirect
• d4b180d Merge pull request #1078 from rust-random/work2
• 1959b1a Adjust homepage to point at the book
• e9adf45 Switch documentation links to docs.rs
• da3458b Add HTML redirect
• Additional commits viewable in compare view

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[iceiix]

error[E0599]: no function or associated item named `from_seed` found for struct `Lcg64Xsh32` in the current scope
768
   --> src/chunk_builder.rs:154:40
769
    |
770
154 |         let mut rng = rand_pcg::Pcg32::from_seed([
771
    |                                        ^^^^^^^^^ function or associated item not found in `Lcg64Xsh32`
772
    |
773
    = help: items from traits can only be used if the trait is in scope
774
    = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
775
            `use rand_core::SeedableRng;`
776

777
error[E0277]: a value of type `std::string::String` cannot be built from an iterator over elements of type `u8`
778
   --> src/screen/server_list.rs:533:34
779
    |
780
533 | ...                   .collect();
781
    |                        ^^^^^^^ value of type `std::string::String` cannot be built from `std::iter::Iterator<Item=u8>`
782
    |
783
    = help: the trait `FromIterator<u8>` is not implemented for `std::string::String`
784

785
error[E0277]: a value of type `std::string::String` cannot be built from an iterator over elements of type `u8`
786
   --> src/screen/login.rs:180:22
787
    |
788
180 |                     .collect();
789
    |                      ^^^^^^^ value of type `std::string::String` cannot be built from `std::iter::Iterator<Item=u8>`
790
    |
791
    = help: the trait `FromIterator<u8>` is not implemented for `std::string::String`
792

793
error[E0277]: the trait bound `Lcg64Xsh32: SeedableRng` is not satisfied
794
   --> src/ui/logo.rs:105:17
795
    |
796
105 |                 rand::SeedableRng::from_seed([45, 0, 0, 0, 64, 0, 0, 0, 32, 0, 0, 0, 12, 0, 0, 0]);
797
    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `SeedableRng` is not implemented for `Lcg64Xsh32`
798
    |
799
    = note: required by `from_seed`
800

801
error[E0277]: the trait bound `Lcg64Xsh32: RngCore` is not satisfied
802
   --> src/ui/logo.rs:106:34
803
    |
804
106 |             text_strings.shuffle(&mut r);
805
    |                                  ^^^^^^ the trait `RngCore` is not implemented for `Lcg64Xsh32`
806
    |
807
    = note: required because of the requirements on the impl of `Rng` for `Lcg64Xsh32`
808

809
warning: unused import: `Rng`
810
 --> src/chunk_builder.rs:8:18
811
  |
812
8 | use rand::{self, Rng, SeedableRng};
813
  |                  ^^^
814
  |
815
  = note: `#[warn(unused_imports)]` on by default
816

817
warning: unused import: `SeedableRng`
818
 --> src/chunk_builder.rs:8:23
819
  |
820
8 | use rand::{self, Rng, SeedableRng};
821
  |                       ^^^^^^^^^^^

[iceiix]

Alphanumeric samples bytes instead of chars rust-random/rand#935

This might explain the failures (u8 instead of char here):
error[E0277]: a value of type std::string::String cannot be built from an iterator over elements of type u8
value of type std::string::String cannot be built from std::iter::Iterator<Item=u8>
790
help: the trait FromIterator<u8> is not implemented for std::string::String

[iceiix]

Updating along with rand_pcg, fewer errors:

error[E0425]: cannot find function `thread_rng` in crate `rand`
   --> src/screen/server_list.rs:530:43
    |
530 | ...                   rand::thread_rng().sample(&rand::distributions::Alphanumeric)
    |                             ^^^^^^^^^^ not found in `rand`

error[E0425]: cannot find function `thread_rng` in crate `rand`
   --> src/screen/login.rs:178:37
    |
178 |                     .map(|()| rand::thread_rng().sample(&rand::distributions::Alphanumeric))
    |                                     ^^^^^^^^^^ not found in `rand`

error[E0425]: cannot find function `thread_rng` in crate `rand`
   --> src/server/mod.rs:196:15
    |
196 |         rand::thread_rng().fill(&mut shared);
    |               ^^^^^^^^^^ not found in `rand`

error[E0425]: cannot find function `thread_rng` in crate `rand`
   --> src/server/mod.rs:292:29
    |
292 |         let mut rng = rand::thread_rng();
    |                             ^^^^^^^^^^ not found in `rand`

warning: unused import: `rand::Rng`
  --> src/screen/server_list.rs:28:5
   |
28 | use rand::Rng;
   |     ^^^^^^^^^
   |
   = note: `#[warn(unused_imports)]` on by default

warning: unused import: `Rng`
  --> src/screen/login.rs:20:18
   |
20 | use rand::{self, Rng};
   |                  ^^^

warning: unused import: `Rng`
  --> src/server/mod.rs:29:18
   |
29 | use rand::{self, Rng};
   |                  ^^^

could update this in #450...

[iceiix]

Updating changes in #450 to rand 0.8.0, rand_pcg 0.3.0, introduces new issues with default-features = false: thread_rng is not included, see readme:

Rand supports limited functionality in no_std mode (enabled via default-features = false). In this case, OsRng and from_entropy are unavailable (unless getrandom is enabled), large parts of seq are unavailable (unless alloc is enabled), and thread_rng and random are unavailable.

if I remove disabling default feature flags, then only two straightforward type errors:

rror[E0277]: a value of type `std::string::String` cannot be built from an iterator over elements of type `u8`
   --> src/screen/server_list.rs:533:34
    |
533 | ...                   .collect();
    |                        ^^^^^^^ value of type `std::string::String` cannot be built from `std::iter::Iterator<Item=u8>`
    |
    = help: the trait `FromIterator<u8>` is not implemented for `std::string::String`

error[E0277]: a value of type `std::string::String` cannot be built from an iterator over elements of type `u8`
   --> src/screen/login.rs:180:22
    |
180 |                     .collect();
    |                      ^^^^^^^ value of type `std::string::String` cannot be built from `std::iter::Iterator<Item=u8>`
    |
    = help: the trait `FromIterator<u8>` is not implemented for `std::string::String`

[iceiix]

Updating in #450

[dependabot-preview]

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