Recordscargoonce_cell1.21.4once_cell::race::OnceBox
Published samples
- once_cell 1.21.4: Differentiate lock-free once_cell::race from blocking once_cell::sync across default-features=false configurations, proving race initializers run redundantly under contention while sync initializers run exactly once 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. HOWonce_cell::race::OnceBoxonce_cell::race::OnceBox::get_or_initonce_cell::race::OnceNonZeroUsizeonce_cell::race::OnceNonZeroUsize::get_or_initonce_cell::race::OnceBoolonce_cell::race::OnceBool::get_or_initonce_cell::race::OnceRefonce_cell::race::OnceRef::get_or_initonce_cell::sync::OnceCellonce_cell::sync::OnceCell::get_or_initonce_cell::unsync::OnceCellrust MIT-0 · 2026-08-16
- once_cell 1.21.4: Distinguish non-blocking race initialization from blocking sync initialization in once_cell, proving that race::OnceBox executes all concurrent closures and drops loser allocations, permits re-entrancy without deadlocking, and does not poison on panics 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. HOWonce_cell::race::OnceBoxonce_cell::race::OnceBox::get_or_initonce_cell::race::OnceBox::setonce_cell::race::OnceBox::cloneonce_cell::race::OnceNonZeroUsizeonce_cell::race::OnceBoolonce_cell::race::OnceRefonce_cell::sync::OnceCellonce_cell::sync::OnceCell::get_or_initonce_cell::sync::OnceCell::setonce_cell::sync::OnceCell::try_insertonce_cell::unsync::OnceCellonce_cell::unsync::OnceCell::get_or_initrust MIT-0 · 2026-08-16
Compatibility matrix
Project-level observations and symbol/contract verifications are counted separately and never combined.
These counts do not distinguish how the symbol was called: overloads, argument shapes and options are pooled together. What a particular call shape does is proven by a sample's contract, not by these numbers.
| Environment | Confidence | Observations | Verified | Pass rate | Peers | Last seen |
|---|---|---|---|---|---|---|
| rust 1 · Rust · cargo · linux musl · docker
Observations: PROJECT_TEST 1✓ — Verified: CONTRACT 3✓
|
MEDIUM | 1 | 3 | 100% | 1 · 2✓ | 2026-09-08 |
snapshot · 2026-09-15
Failure clusters
-
observed PROJECT_COMPILE exit 101 E0507 ×1 1.21.4 os=linux sha256:4488bf5be6d6…error[E0507]: cannot move out of static item `FIELD_SET`rust/rustc · compiler-diagnostic · outer cargo runEvidence quality: complete · Environment variants: 1 · First recorded: 2026-09-16 · Last seen: 2026-09-16
-
observed PROJECT_COMPILE exit 101 ×1 1.21.4 os=linux sha256:7641f360237b…error: could not compile `sample-tracing-core` (bin <str>) due to 1 previous errorrust/rustc · compiler-diagnostic · outer cargo runEvidence quality: complete · Environment variants: 1 · First recorded: 2026-09-16 · Last seen: 2026-09-16
-
observed UNKNOWN exit 101 ERROR Evidence gap ×1 1.21.4 os=linux sha256:7c6fafa6a835…Compiling sample-tracing-core v1.0.0 (<path> · Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s · Running `target/debug/contract` …cargo · unclassified-diagnostic · outer cargo run · gap stage-unknownEvidence quality: complete · Environment variants: 1 · First recorded: 2026-09-16 · Last seen: 2026-09-16Diagnostic re-verification candidate
-
observed PROJECT_COMPILE exit 101 ×1 1.21.4 os=linux sha256:4d444e9e07b5…error: could not compile `test-wb` (bin <str>) due to 1 previous errorrust/rustc · compiler-diagnostic · outer cargo checkEvidence quality: complete · Environment variants: 1 · First recorded: 2026-09-19 · Last seen: 2026-09-19
-
observed PROJECT_COMPILE exit 101 E0599 ×1 1.21.4 os=linux sha256:689d8da7053d…error[E0599]: no method named `http1_only` found for mutable reference `&mut hyper_util::client::legacy::Builder` in the current scoperust/rustc · compiler-diagnostic · outer cargo runEvidence quality: complete · Environment variants: 1 · First recorded: 2026-09-19 · Last seen: 2026-09-19
-
observed PROJECT_COMPILE exit 101 E0432 ×1 1.21.4 os=linux sha256:81ff5a6ae827…error[E0432]: unresolved import `wasm_bindgen_macro`rust/rustc · compiler-diagnostic · outer cargo checkEvidence quality: complete · Environment variants: 1 · First recorded: 2026-09-19 · Last seen: 2026-09-19
-
observed PROJECT_COMPILE exit 101 E0433 ×1 1.21.4 os=linux sha256:8d7d824b0493…error[E0433]: cannot find module or crate `wasm_bindgen` in this scoperust/rustc · compiler-diagnostic · outer cargo checkEvidence quality: complete · Environment variants: 1 · First recorded: 2026-09-19 · Last seen: 2026-09-19
-
observed PROJECT_COMPILE exit 101 ×1 1.21.4 os=linux sha256:a67fd218023f…error: could not compile `test-hyper-util` (bin <str>) due to 1 previous errorrust/rustc · compiler-diagnostic · outer cargo runEvidence quality: complete · Environment variants: 1 · First recorded: 2026-09-19 · Last seen: 2026-09-19
-
observed PROJECT_COMPILE exit 101 ×1 1.21.4 os=linux sha256:d0b315730521…error: could not compile `test-macro` (bin <str>) due to 1 previous errorrust/rustc · compiler-diagnostic · outer cargo checkEvidence quality: complete · Environment variants: 1 · First recorded: 2026-09-19 · Last seen: 2026-09-19
-
observed UNKNOWN signal ABORTED Evidence gap ×1 1.21.4 os=linux sha256:5650faa5dc98…Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.02s · Running `target/debug/test-js-sys` …cargo · unclassified-diagnostic · outer cargo run · gap stage-unknownEvidence quality: complete · Environment variants: 1 · First recorded: 2026-09-19 · Last seen: 2026-09-19Diagnostic re-verification candidate
-
observed UNKNOWN exit 101 Evidence gap ×1 1.21.4 os=linux sha256:7714306cce9e…Compiling unicode-ident v1.0.26 · Compiling cfg-if v1.0.5 · Compiling once_cell v1.21.4 · Compiling proc-macro2 v1.0.107cargo · unclassified-diagnostic · outer cargo run · gap stage-unknownEvidence quality: complete · Environment variants: 1 · First recorded: 2026-09-19 · Last seen: 2026-09-19Diagnostic re-verification candidate
-
observed UNKNOWN exit 101 Evidence gap ×1 1.21.4 os=linux sha256:c6c5fb2b7e90…Compiling test_wb v0.1.0 (<path> · Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s · Running `target/debug/test_wb` …cargo · unclassified-diagnostic · outer cargo run · gap stage-unknownEvidence quality: complete · Environment variants: 1 · First recorded: 2026-09-19 · Last seen: 2026-09-19Diagnostic re-verification candidate
Showing the 12 most-reported of 18 recorded failure clusters. The rest are single reports.