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Document why layout.align() + layout.size() doesn't overflow#155255

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Zoxc wants to merge 1 commit intorust-lang:mainfrom
Zoxc:ub-issue-16
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Document why layout.align() + layout.size() doesn't overflow#155255
Zoxc wants to merge 1 commit intorust-lang:mainfrom
Zoxc:ub-issue-16

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@Zoxc Zoxc commented Apr 13, 2026

This addition looks suspicious and is safety critical, but is saved by the weird Layout invariants.

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Apr 13, 2026
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rustbot commented Apr 13, 2026

r? @Mark-Simulacrum

rustbot has assigned @Mark-Simulacrum.
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The reviewer was selected based on:

  • Owners of files modified in this PR: @ChrisDenton, libs
  • @ChrisDenton, libs expanded to 8 candidates
  • Random selection from Mark-Simulacrum, jhpratt

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