Tools for concurrent programming in Rust
This report summarizes scanner evidence for crossbeam-rs/crossbeam, a Rust project with 8,605 GitHub stars. SynthScan examined 49,550 lines of code across 160 source files, recording 452 pattern matches distributed across 2 syntactic categories. The legacy adjusted pattern signal is 8.2 (Moderate pattern signal); it is not an authorship estimate.
Use the findings to ask whether maintainers can explain intent, verify dependencies, simplify unnecessary scaffolding, and focus review effort. Risk Payload v1 adds ownership, supply-chain, over-engineering, and review-effort vectors when available. These are prompts for human verification, not probabilities, security findings, or measured maintenance costs.
Use each vector to guide manual verification of the underlying findings.
Can maintainers explain intent, assumptions, and trade-offs? 451 finding(s).
Are imports declared and package/API names verified? 1 finding(s).
Are wrappers, guards, and repeated structures necessary? 0 finding(s).
Which changes need focused human review? 452 finding(s).
This chart tracks the legacy adjusted pattern score across scan runs. Changes can reflect source changes, scan coverage, or detector/scoring versions; they do not measure AI adoption or prove that a team refactored code. Compare runs only when their scoring versions are compatible. The dashed line tracks the raw pattern-hit count.
Groups findings by configured severity weight. Severity is not a confidence estimate, security rating, or proof that a package is missing. Verify imports against the project's manifests and inspect each finding in its local design context.
This horizontal bar chart shows where configured pattern scores accumulate across directories. Treat the bars as locations to inspect, not as evidence of authorship or code quality. Use the file-level findings to decide whether a directory needs a focused ownership, dependency, complexity, or review check.
The scanner identified 452 distinct pattern matches across 2 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a detector match to inspect in context. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.
Reading the findings table: The Severity column indicates the configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | crossbeam-epoch/src/collector.rs | 1 | /// Epoch-based garbage collector. | COMMENT |
| LOW | crossbeam-epoch/src/lib.rs | 1 | //! Epoch-based memory reclamation. | COMMENT |
| LOW | crossbeam-epoch/src/lib.rs | 21 | //! | COMMENT |
| LOW | crossbeam-epoch/src/lib.rs | 41 | //! | COMMENT |
| LOW | crossbeam-epoch/src/internal.rs | 1 | //! The global data and participant for garbage collection. | COMMENT |
| LOW | crossbeam-epoch/src/internal.rs | 21 | //! Objects that get unlinked from concurrent data structures must be stashed away until the global | COMMENT |
| LOW | crossbeam-epoch/src/internal.rs | 321 | /// The local epoch. | COMMENT |
| LOW | crossbeam-epoch/src/internal.rs | 421 | if cfg!(all( | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 101 | /// qualifies such types that are pointed to by a single word. | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 121 | /// The type for initializers. | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 141 | /// | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 181 | } | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 281 | COMMENT | |
| LOW | crossbeam-epoch/src/atomic.rs | 341 | /// | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 361 | /// | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 381 | /// ``` | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 401 | /// # unsafe { drop(a.into_owned()); } // avoid leak | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 421 | /// let p = a.swap(Shared::null(), SeqCst, guard); | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 441 | /// the comparison fails. Using `Acquire` as success ordering makes the store part | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 481 | CompareExchangeError { | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 501 | /// read-modify-write operation that takes place if the comparison with `current` succeeds. | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 521 | /// # unsafe { drop(a.load(SeqCst, guard).into_owned()); } // avoid leak | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 581 | /// when the operation finally succeeds while the second describes the | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 601 | /// | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 641 | /// | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 661 | #[cfg(not(miri))] | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 681 | /// use crossbeam_epoch::{self as epoch, Atomic, Shared}; | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 701 | Shared::from_ptr( | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 721 | /// | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 741 | as *mut (), | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 761 | /// # Examples | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 781 | unsafe { Owned::from_ptr(self.data.into_inner()) } | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 801 | /// ptr: Atomic<usize>, | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 901 | /// | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 981 | /// the same raw pointer. | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1001 | ensure_aligned::<T>(raw); | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1021 | COMMENT | |
| LOW | crossbeam-epoch/src/atomic.rs | 1041 | /// ``` | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1061 | /// ``` | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1081 | /// Returns the same pointer, but tagged with `tag`. `tag` is truncated to be fit into the | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1141 | COMMENT | |
| LOW | crossbeam-epoch/src/atomic.rs | 1221 | _marker: PhantomData, | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1241 | /// assert_eq!(p.as_raw(), raw); | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1261 | pub const fn null() -> Self { | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1301 | /// | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1321 | /// | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1341 | /// actual object at the same time. | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1361 | /// b.push(5); | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1381 | /// Dereferencing a pointer is unsafe because it could be pointing to invalid memory. | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1401 | /// let p = a.load(SeqCst, guard); | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1421 | /// | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1441 | debug_assert!(!self.is_null(), "converting a null `Shared` into `Owned`"); | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1461 | /// let p = a.load(SeqCst, guard); | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1481 | /// use std::sync::atomic::Ordering::SeqCst; | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1501 | /// use std::sync::atomic::Ordering::SeqCst; | COMMENT |
| LOW | crossbeam-epoch/src/atomic.rs | 1521 | /// # Panics | COMMENT |
| LOW | crossbeam-epoch/src/guard.rs | 1 | use core::{fmt, mem}; | COMMENT |
| LOW | crossbeam-epoch/src/guard.rs | 21 | /// let guard = &epoch::pin(); | COMMENT |
| LOW | crossbeam-epoch/src/guard.rs | 41 | /// // Load the heap-allocated object and create pointer `p` on the stack. | COMMENT |
| LOW | crossbeam-epoch/src/guard.rs | 61 | /// let guard2 = epoch::pin(); | COMMENT |
| 391 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | crossbeam-channel/benchmarks/plot.py | 2 | CODE |