Sample
semver 1.0.28: Enabling the serde feature on semver serializes Version and VersionReq as flat strings rather than nested structs, while bare requirement strings default to caret ranges and empty strings fail parsing
Verified sample for cargo semver 1.0.28: Enabling the serde feature on semver serializes Version and VersionReq as flat strings rather than nested structs…
sha256:135433c9e1bd94f656bcd195488e72bbd4deac30203f7ef9f814378f28aeb022
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
- Enabling the serde feature on semver serializes Version and VersionReq as flat strings rather than nested structs, while bare requirement strings default to caret ranges and empty strings fail parsing
- Packages
- Symbols
-
- semver::Version
- semver::VersionReq
- semver::Op
- semver::Version::parse
- semver::VersionReq::parse
- semver::VersionReq::matches
- Environment
- rust
- Created
- 2026-08-16T08:22:17Z
Contract
- assert serde serializes Version and VersionReq as strings rejecting structural map JSON
- assert bare requirement strings parse as Op::Caret (^1.2.3) matching minor bumps rather than exact equality
- assert VersionReq::STAR has empty comparators matching all versions whereas VersionReq::parse empty string fails
- assert Version::parse rejects leading 'v' prefix and missing patch numbers
- assert 0.x caret rules enforce breaking changes at minor and patch zero boundaries
- assert Version Ord differentiates build metadata for total ordering while VersionReq matching ignores it
Files
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs