Sample
golang.org/x/sync 0.22.0: Handle semaphore weighted acquisition, FIFO anti-starvation head-of-line blocking, TryAcquire waiter suppression, canceled waiter unblocking, and excess release panics
Verified sample for golang golang.org/x/sync 0.22.0: Handle semaphore weighted acquisition, FIFO anti-starvation head-of-line blocking, TryAcquire waiter…
sha256:0cad4dd8b986e020f9eebd78f63e6c5a68bc3ffa5cb9d52f9d5f9d4b235d0ee9
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
go linux x64 go go gomod
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| go 1.26 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · golang@1 |
2026-08-17 |
| go 1.26 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · golang@1 |
2026-08-18 |
Case
HOW- Goal
- Handle semaphore weighted acquisition, FIFO anti-starvation head-of-line blocking, TryAcquire waiter suppression, canceled waiter unblocking, and excess release panics
- Packages
- Symbols
-
- semaphore.NewWeighted
- Weighted.Acquire
- Weighted.TryAcquire
- Weighted.Release
- Environment
- go
- Created
- 2026-08-17T15:40:26Z
Contract
- assert semaphore.Weighted enforces strict FIFO ordering so smaller Acquire requests remain blocked behind a larger head waiter even when sufficient unallocated tokens exist
- assert TryAcquire returns false whenever waiters are queued in the wait list even if unallocated capacity is available
- assert canceling a blocked head waiter context immediately unblocks subsequent queued waiters without requiring an additional Release
- assert calling Acquire with an already-canceled context returns context.Canceled immediately without modifying token capacity
- assert calling Release with a weight greater than currently held tokens panics immediately
Files
- NOTES.md
- contract_test.go
- csx.json
- go.mod
- go.sum