Sample
rand 0.9.5: SliceRandom partial_shuffle partitions sampled elements into the slice suffix rather than prefix, and choose_multiple_weighted terminates early on zero weights instead of erroring
Verified sample for cargo rand 0.9.5: SliceRandom partial_shuffle partitions sampled elements into the slice suffix rather than prefix, and…
sha256:2a57de5ed185983b10cbdde856a073ded7593dfb976c1e4b88c1374c2f55db88
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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 |
2026-08-17 |
| 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
- SliceRandom partial_shuffle partitions sampled elements into the slice suffix rather than prefix, and choose_multiple_weighted terminates early on zero weights instead of erroring
- Packages
- Symbols
-
- rand::seq::SliceRandom::partial_shuffle
- rand::seq::IndexedRandom::choose_multiple_weighted
- rand::seq::IndexedRandom::choose_weighted
- Environment
- rust
- Created
- 2026-08-17T01:04:23Z
Contract
- assert partial_shuffle places the sampled elements at the suffix (len - amount..) and unselected elements at prefix (..len - amount)
- assert partial_shuffle with amount 0 leaves the whole slice unselected and returns an empty sample
- assert partial_shuffle with amount >= len shuffles the entire slice into the sample and leaves an empty unselected partition
- assert choose_multiple_weighted returns Ok with only positive-weight items when positive weights are fewer than requested amount
- assert choose_multiple_weighted with all zero weights returns Ok with an empty iterator rather than erroring
- assert choose_weighted for a single element with all zero weights returns Err(InsufficientNonZero)
Files
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs