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Normalize raw derive attributes - #3624

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Gzghu5ypldjnatumvxfh6zygvwuqht3av
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Normalize raw derive attributes#3624
joshlf wants to merge 1 commit into
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Gzghu5ypldjnatumvxfh6zygvwuqht3av

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@joshlf

@joshlf joshlf commented Sep 4, 2026

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Rust accepts raw identifier spellings for representation attributes, but the
derive parser compared their token spelling literally. As a result, it could
ignore compiler-applied layout constraints and emit unsafe trait impls for the
wrong layout.

Normalize raw identifiers when matching attributes and representation hints,
including Zerocopy helper attributes. Add parser-level and end-to-end tests for
IntoBytes, TryFromBytes, and KnownLayout behavior.

Closes #3620

Authored by an AI agent acting on Josh Liebow-Feeser's behalf.


Latest Update: v2 — Compare vs v1

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Rust accepts raw identifier spellings for representation attributes, but the
derive parser compared their token spelling literally. As a result, it could
ignore compiler-applied layout constraints and emit unsafe trait impls for the
wrong layout.

Normalize raw identifiers when matching attributes and representation hints,
including Zerocopy helper attributes. Add parser-level and end-to-end tests for
IntoBytes, TryFromBytes, and KnownLayout behavior.

Closes #3620

*Authored by an AI agent acting on Josh Liebow-Feeser's behalf.*

gherrit-pr-id: Gzghu5ypldjnatumvxfh6zygvwuqht3av
@chatgpt-codex-connector

chatgpt-codex-connector Bot commented Sep 4, 2026

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Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review Status Commit Review trigger
📝 Code Review Completed 2026-09-06T00:04:16.625338Z 1f845df Manual request
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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.85%. Comparing base (2dad389) to head (1f845df).

Additional details and impacted files
@@           Coverage Diff           @@
##             main    #3624   +/-   ##
=======================================
  Coverage   91.85%   91.85%           
=======================================
  Files          20       20           
  Lines        6093     6093           
=======================================
  Hits         5597     5597           
  Misses        496      496           

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@joshlf

joshlf commented Sep 6, 2026

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Codex Review: Didn't find any major issues. Chef's kiss.

Reviewed commit: 1f845df563

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Security Advisory: Raw representation attributes bypass layout validation and expose padding bytes

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