Actionable comments posted: 0

🧹 Nitpick comments (1)

crates/vm/src/stdlib/ast/pattern.rs (1)

566-577: Consider adding a debug assertion for length mismatch.

The zip() will silently truncate if kwd_attrs and kwd_patterns have different lengths, which could mask upstream bugs or malformed AST input. A debug_assert_eq! would catch this during development without runtime cost in release builds.

 fn merge_pattern_match_class(
     patterns: PatternMatchClassPatterns,
     kwd_attrs: PatternMatchClassKeywordAttributes,
     kwd_patterns: PatternMatchClassKeywordPatterns,
 ) -> (Vec<ruff::Pattern>, Vec<ruff::PatternKeyword>) {
+    debug_assert_eq!(
+        kwd_attrs.0.len(),
+        kwd_patterns.0.len(),
+        "kwd_attrs and kwd_patterns length mismatch"
+    );
     let keywords = kwd_attrs
         .0
         .into_iter()
         .zip(kwd_patterns.0)

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• crates/vm/src/stdlib/ast/pattern.rs (3 hunks)

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**/*.rs: Follow the default rustfmt code style by running cargo fmt to format Rust code
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Files:

• crates/vm/src/stdlib/ast/pattern.rs

🧬 Code graph analysis (1) crates/vm/src/stdlib/ast/pattern.rs (4)

crates/vm/src/stdlib/itertools.rs (1)

• None (1152-1152)

crates/vm/src/builtins/genericalias.rs (1)

• arguments (66-66)

crates/vm/src/frame.rs (1)

• kwd_attrs (1122-1122)

crates/vm/src/stdlib/functools.rs (1)

• keywords (72-74)

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🔇 Additional comments (2)

crates/vm/src/stdlib/ast/pattern.rs (2)

201-228: LGTM! Clean implementation of Singleton conversion.

The identity-based checks using object.is() for True and False are correct for Python singletons, and vm.is_none() properly handles the None case.

---

390-436: LGTM! Clean newtype wrapper pattern.

The tuple structs provide type-safe wrappers around the vectors, and the Node implementations correctly delegate to the inner collection's serialization/deserialization.