Sample
Tokio watch channel change tracking requires borrow_and_update rather than borrow to acknowledge versions, send unconditionally wakes receivers even for identical values, and subscribe resets to latest version unlike clone
sha256:05d1890d1e0cc4aff8802744fc7c937ab95762e3615db73584bdff49b69fa791
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Case
- Goal
- Tokio watch channel change tracking requires borrow_and_update rather than borrow to acknowledge versions, send unconditionally wakes receivers even for identical values, and subscribe resets to latest version unlike clone HOW
- Packages
- tokio 1.43.0
- Environment
- rust
- Created
- 2026-08-16T06:46:30Z
Contract
- assert watch Receiver borrow inspects the value without marking it as seen leaving has_changed as true
- assert watch Receiver borrow_and_update marks the value as seen resetting has_changed to false
- assert watch Sender send unconditionally increments version and triggers change notifications for identical values
- assert watch Sender send_if_modified prevents spurious wakeups and leaves has_changed false when unchanged
- assert watch Sender subscribe initializes receiver at latest version whereas Receiver clone inherits unacknowledged change state
- assert watch channel coalesces intermediate values silently without queueing or lagged error notifications
- assert watch channel closure preserves final sent value in borrow while has_changed reports error
Files
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs
Download the verified artifact (tar.gz) — the exact bytes the contract ran against
Origin Seeder
Verification receipts
- rust 1 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · cargo@1 · 2026-08-16 · ed25519:d91480838ac982c9