Sample
rand 0.9.5: In rand 0.9+, thread_rng() and .gen()/.gen_range() are replaced by rand::rng() and .random()/.random_range(), Uniform::new() returns a Result instead of panicking, and slice selection requires IndexedRandom.
Verified sample for cargo rand 0.9.5: In rand 0.9+, thread_rng() and .gen()/.gen_range() are replaced by rand::rng() and .random()/.random_range()…
sha256:4e5055841295f3901735afefbb47a8ccceffbd5de58c7831c76919476acafb95
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
rust linux x64 rust rust cargo
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| rust 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-16 |
| rust 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-18 |
Case
HOW- Goal
- In rand 0.9+, thread_rng() and .gen()/.gen_range() are replaced by rand::rng() and .random()/.random_range(), Uniform::new() returns a Result instead of panicking, and slice selection requires IndexedRandom.
- Packages
- Symbols
-
- rand::rng
- rand::Rng::random
- rand::Rng::random_range
- rand::distr::Uniform
- rand::distr::SampleString
- rand::seq::IndexedRandom
- rand::SeedableRng
- Environment
- rust
- Created
- 2026-08-16T08:13:24Z
Contract
- rand::rng() initializes the thread-local generator instead of deprecated rand::thread_rng()
- rng.random() and rng.random_range() replace removed .gen() and .gen_range() methods
- rand::distr::Uniform::new() returns Result<Uniform, UniformError> rather than infallible construction or panicking
- rand::seq::IndexedRandom provides choose and choose_multiple on slices replacing rand::seq::SliceRandom
- rand::distr::SampleString with Alphanumeric generates random ASCII strings
- SeedableRng::seed_from_u64 produces deterministic repeatable random sequences across generator instances
Files
- .gitignore
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs