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Recent review info

Run configuration

• Source mode: Auto
• Repository: RustPython/RustPython
• Branch: main
• File: .coderabbit.yml
• Commit: b811715
• Layers: Repository YAML
• Review profile: CHILL
• Plan: Advanced
• Run ID: 97ed01c2-e46a-4524-b869-894daa91c4ef

Commits

Reviewing files that changed from the base of the PR and between 332101a and f4df593.

Files selected for processing: 2

• crates/vm/src/gc_state.rs
• crates/vm/src/object/core.rs

Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 8 remain after this review.

Object tracking can now suppress collection during allocation. ctypes hidden references use owner groups and cached tuple snapshots for groups with multiple owners.

Changes: ctypes hidden-reference retention

Layer / File(s)	Summary
Optional collection during allocation crates/vm/src/gc_state.rs, crates/vm/src/object/core.rs	track_new_object_impl and a shared PyRef allocation path accept a collection flag. new_ref enables collection; new_ref_without_collection disables it on supported host builds.
Owner groups and snapshots crates/vm/src/stdlib/_ctypes/base.rs	PrivateRefs tracks owner groups and reference counts, traverses and clears retained references, and caches a tuple snapshot for multiple owners until the owner set changes.
CData hidden-reference integration crates/vm/src/stdlib/_ctypes/base.rs	CDataValue and retention helpers use optional HiddenRefs groups in conversions, assignments, and keep operations.

Priority: Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Refactor

Possibly related PRs

• RustPython/RustPython#9391: Changes PrivateRefs owner structure and traversal paths used by this PR.
• RustPython/RustPython#9390: Adds GC traversal and clearing for ctypes state that this PR extends.
• RustPython/RustPython#9251: Introduces the reference-counted ownership and snapshot model that this PR changes.

Suggested reviewers: youknowone

Merge Risk: Minimal · up to f4df5

No actionable merge-blocking defect is established by the reviewed changes.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 21.05% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 19 functions across 3 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: sharing ctypes backing-owner snapshots across aggregate copies.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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