Sample
pin-project-lite 0.2.17: Enforce !Unpin on pin_project! structs using #[pin] PhantomPinned or #[project(!Unpin)] instead of untagged PhantomPinned
Verified sample for cargo pin-project-lite 0.2.17: Enforce !Unpin on pin_project! structs using #[pin] PhantomPinned or #[project(!Unpin)] instead of…
sha256:dca81589d2d6b9ea1e205efb1ea79821ea28d608e9f154452fc80711cb34dec0
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 |
2026-08-17 |
| 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
- Enforce !Unpin on pin_project! structs using #[pin] PhantomPinned or #[project(!Unpin)] instead of untagged PhantomPinned
- Packages
- Symbols
-
- pin_project!
- Environment
- rust
- Created
- 2026-08-17T02:33:48Z
Contract
- UntaggedPhantom<i32, String> implements Unpin despite containing a PhantomPinned field because pin_project! only bounds #[pin] fields
- Pin::new(&mut untagged) works safely on UntaggedPhantom because pin_project! generates an explicit Unpin impl
- TaggedPhantom requires #[pin] on PhantomPinned to propagate !Unpin to the struct
- AttributeNotUnpin uses #[project(!Unpin)] to suppress the automatic Unpin implementation entirely
- project() returns Pin<&mut T> for #[pin] fields and &mut U for unpinned fields
- project_ref() returns Pin<&T> for #[pin] fields and &U for unpinned fields
- project_replace replaces the struct in-place and moves out unpinned fields by value
Files
- .gitignore
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs