Sample
pin-project-lite 0.2.17: pin_project! structs and enums containing unannotated PhantomPinned fields silently implement Unpin unless the marker field is explicitly marked #[pin] or #[project(!Unpin)]
Verified sample for cargo pin-project-lite 0.2.17: pin_project! structs and enums containing unannotated PhantomPinned fields silently implement Unpin unless…
sha256:b33532a2526fe99d33a925874d2996d48de67a31c0f8ffe18f3232a939e66356
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
- pin_project! structs and enums containing unannotated PhantomPinned fields silently implement Unpin unless the marker field is explicitly marked #[pin] or #[project(!Unpin)]
- Packages
- Symbols
-
- pin_project_lite::pin_project
- pin_project_lite::pin_project!
- Environment
- rust
- Created
- 2026-08-16T09:36:38Z
Contract
- assert a pin_project struct containing an unannotated PhantomPinned field silently implements Unpin allowing safe in-place dereferencing via Pin::new and Pin::get_mut
- assert annotating a PhantomPinned field with #[pin] or applying #[project(!Unpin)] disables automatic Unpin implementation and requires unsafe Pin::new_unchecked construction
- assert a pin_project enum with unannotated PhantomPinned variant fields implements Unpin as long as its #[pin] variant fields implement Unpin
- assert project_replace moves out unpinned fields into ProjOwn while replacing the pinned struct and dropping pinned fields in-place
- assert projection types and project methods generated for pub structs have pub(crate) visibility rather than public export
Files
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs