Sample
regex 1.10.2: Regex with alternation ending in different suffixes returns the leftmost match instead of skipping to a later branch via reverse suffix optimization, fixed in 1.10.2
Verified sample for cargo regex 1.10.2: Regex with alternation ending in different suffixes returns the leftmost match instead of skipping to a later branch…
sha256:24f95306df8f2647630f70e9d2a119be71933a762eaf848ce0e6f3abe939dd0b
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
- Regex with alternation ending in different suffixes returns the leftmost match instead of skipping to a later branch via reverse suffix optimization, fixed in 1.10.2
- Packages
- Symbols
-
- regex::Regex::find
- regex::Regex::find_iter
- regex::Regex::captures
- Environment
- rust
- Created
- 2026-08-16T05:25:35Z
Contract
- compile regex pattern with alternations having distinct suffixes: (\\N\{[^}]+})|([{}])
- assert find on 'hiya \\N{snowman} bye' returns leftmost match at 5..16 ('\\N{snowman}') rather than later alternate suffix '{' at 7..8
- assert find_iter matches single span 5..16 rather than [7..8, 15..16]
- assert captures matches capture group 1 ('\\N{snowman}') with group 2 as None
Files
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs