Sample
getrandom 0.3.4: getrandom 0.3 unsupported backend compiles cleanly but fails non-empty fills with Error::UNSUPPORTED while short-circuiting empty slices to Ok
Verified sample for cargo getrandom 0.3.4: getrandom 0.3 unsupported backend compiles cleanly but fails non-empty fills with Error::UNSUPPORTED while…
sha256:846965d520a96d1f4fc9e250730d0cd97cc28ba1781205f81eee92cf0b08ee85
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
- getrandom 0.3 unsupported backend compiles cleanly but fails non-empty fills with Error::UNSUPPORTED while short-circuiting empty slices to Ok
- Packages
- Symbols
-
- getrandom::fill
- getrandom::fill_uninit
- getrandom::u32
- getrandom::u64
- getrandom::Error::UNSUPPORTED
- getrandom::Error::raw_os_error
- getrandom::Error::new_custom
- Environment
- rust
- Created
- 2026-08-16T09:17:06Z
Contract
- assert getrandom compiles cleanly with --cfg getrandom_backend="unsupported"
- assert getrandom::fill fails non-empty buffers with Error::UNSUPPORTED
- assert getrandom::u32 and u64 fail with Error::UNSUPPORTED
- assert getrandom::fill on empty buffer succeeds with Ok
- assert getrandom::fill_uninit on empty buffer succeeds with Ok
- assert Error::UNSUPPORTED returns None for raw_os_error
Files
- .cargo/config.toml
- .gitignore
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs