Sample
tokio 1.43.0: Tokio Runtime::Builder disables time and IO drivers by default, time::pause requires current_thread runtime, and TOKIO_WORKER_THREADS=0 panics multi-thread builds
Verified sample for cargo tokio 1.43.0: Tokio Runtime::Builder disables time and IO drivers by default, time::pause requires current_thread runtime, and…
sha256:3114583fe7d663d0553a5731690052f41f1660c66158047230a4198a72e13ca9
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
- Tokio Runtime::Builder disables time and IO drivers by default, time::pause requires current_thread runtime, and TOKIO_WORKER_THREADS=0 panics multi-thread builds
- Packages
- Symbols
-
- tokio::runtime::Builder
- tokio::runtime::Builder::enable_time
- tokio::runtime::Builder::enable_io
- tokio::runtime::Builder::enable_all
- tokio::runtime::Builder::worker_threads
- tokio::time::pause
- tokio::time::advance
- Environment
- rust
- Created
- 2026-08-16T06:47:46Z
Contract
- assert tokio::runtime::Builder defaults to disabled timer and panics when calling sleep or timeout without enable_time or enable_all
- assert tokio::runtime::Builder defaults to disabled IO driver and panics when binding TcpListener without enable_io or enable_all
- assert tokio::time::pause panics when called on multi_thread runtime even with enable_time
- assert tokio::time::pause on current_thread runtime with enable_time enables instant virtual time advance
- assert tokio::runtime::Builder::enable_all enables both time and net operations successfully
- assert TOKIO_WORKER_THREADS=0 causes multi_thread runtime build to panic unless explicitly overridden by Builder::worker_threads
Files
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs