rust-fuzz/arbitrary

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Generating structured data from arbitrary, unstructured input.

Stars: 880
Forks: 93
Open beginner issues: 0
Indexed issues: 27

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Jun 22, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

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27 open issues indexed

derive_arbitrary: update to syn 3 Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

rust-fuzz/arbitrary#241 · 1 comment · Opened Sep 10, 2026
Arbitrary type with a borrow that's not &[u8] Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-fuzz/arbitrary#231 · Opened Sep 2, 2025
Limiting recursion thoughts Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-fuzz/arbitrary#223 · Opened Jun 9, 2025
Sampling distribution documentation and tailoring Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-fuzz/arbitrary#221 · Opened Apr 25, 2025
int_in_range (and others) reports success even when running out of entropy Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-fuzz/arbitrary#219 · 4 comments · Opened Apr 10, 2025
List of breaking changes for next breaking release Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

rust-fuzz/arbitrary#217 · 6 comments · Opened Apr 8, 2025
bound attribute doesn't work with associated type bounds Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-fuzz/arbitrary#213 · Opened Feb 18, 2025
Failure to build 1.4.1 on existing projects that were using 1.3.2 Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

rust-fuzz/arbitrary#208 · 4 comments · Opened Nov 8, 2024
Consider a custom type for easier size hints Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

rust-fuzz/arbitrary#201 · 3 comments · Opened Nov 4, 2024
workaround to uses of arbitrary_loop causing non-determinism Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-fuzz/arbitrary#199 · 2 comments · Opened Sep 18, 2024
Add a `check` submodule that provides a mini property-based testing framework Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-fuzz/arbitrary#191 · 3 comments · 1 reaction · Opened Aug 22, 2024
Unstructured v2: Stop-or-Continue-based vs. Delimitor-based Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-fuzz/arbitrary#165 · 2 comments · Opened Jan 12, 2024
Support arbitrary 🥁 collections Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-fuzz/arbitrary#155 · 3 comments · Opened Jun 23, 2023
What to do with `debug_assert!`s inside this crate? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

rust-fuzz/arbitrary#154 · Opened Jun 13, 2023
Derive should throw an error when applying field attributes to variants Open

enhancement help wanted

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rust-fuzz/arbitrary#150 · Opened May 3, 2023
Consider supporting owned `Unstructured`s Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

rust-fuzz/arbitrary#147 · 2 comments · Opened Apr 21, 2023
Arbitrary derive fails with lifetimes in some cases Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-fuzz/arbitrary#104 · 3 comments · Opened Feb 28, 2022
Allow `Unstructured` to be backed by an iterator of bytes instead of a byte slice? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-fuzz/arbitrary#103 · 4 comments · Opened Feb 18, 2022
Deriving `Arbitrary` on a field containing a `Cow<'static, str>` fails. Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-fuzz/arbitrary#86 · 1 comment · Opened Jun 5, 2021
Avoid returning errors where possible Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-fuzz/arbitrary#82 · 1 comment · Opened May 17, 2021
Best way to generate float values in range Open

question

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-fuzz/arbitrary#77 · 7 comments · Opened Mar 20, 2021
Add `impl Arbitrary for Cursor<T> where T: Arbitrary` Open

enhancement help wanted

Difficulty 3/5 1-2 days Newbie friendliness 30/100

rust-fuzz/arbitrary#65 · Opened Nov 23, 2020
Add `impl Arbitrary for BufReader<T> where T: Arbitrary` Open

enhancement help wanted

Difficulty 3/5 1-2 days Newbie friendliness 30/100

rust-fuzz/arbitrary#64 · Opened Nov 23, 2020
Reversed arbitrary Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-fuzz/arbitrary#44 · 10 comments · 10 reactions · Opened May 16, 2020
#![no_std] Support Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 30/100

rust-fuzz/arbitrary#38 · 2 comments · 3 reactions · Opened Apr 24, 2020
Allow getting an arbitrary length with a maximum upper bound Open

Difficulty 3/5 1-2 days Newbie friendliness 40/100

rust-fuzz/arbitrary#36 · 1 comment · 1 reaction · Opened Mar 10, 2020
Enum discriminants should be taken from the end of the input string, like lengths Open

derive

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rust-fuzz/arbitrary#35 · 1 comment · Opened Mar 10, 2020

rust-fuzz/arbitrary

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