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Prove advancement and padding-sequence decisions - #3839

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Gpvecn2gjh2spv5hy32nqxdlgiqp5jus7
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@joshlf

@joshlf joshlf commented Oct 8, 2026 •

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Specify trailing-layout advancement, size offsets, wrapping padding and
dynamic-padding classification against the mathematical formulas.

Prove that a positive size-sequence comparison implies equal complete sizes
for every natural metadata count. Rejection remains conservative and does
not imply inequality. Add total Rust harnesses checking exact advancement
outcomes and the corresponding checked-size comparisons, preserving the
stronger unbounded theorem.

Authored by an AI agent acting on joshlf's behalf.


Latest Update: v31 — Compare vs v30

📚 Full Patch History

Links show the diff between the row version and the column version.

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📝 Code Review ✅ Completed 2026-10-08T10:25:44.428061Z 92358cf PR opened
🔒 Security Review ✅ Completed 2026-10-08T10:25:03.595409Z 92358cf PR opened
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This was referenced Oct 8, 2026
@joshlf
joshlf force-pushed the Gpvecn2gjh2spv5hy32nqxdlgiqp5jus7 branch from 92358cf to 4e8a022 Compare October 9, 2026 00:08
@joshlf
joshlf force-pushed the Ggsdoapsrkoab2sezv6aidvmzy46fo7pu branch from 3401b31 to 5702f26 Compare October 9, 2026 00:08
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Codecov Report

❌ Patch coverage is 0% with 97 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (Ggsdoapsrkoab2sezv6aidvmzy46fo7pu@1151d61). Learn more about missing BASE report.

Files with missing lines Patch % Lines
zerocopy/src/layout/tail_transform_checks.rs 0.00% 97 Missing ⚠️
Additional details and impacted files
@@                         Coverage Diff                          @@
##             Ggsdoapsrkoab2sezv6aidvmzy46fo7pu    #3839   +/-   ##
====================================================================
  Coverage                                     ?   53.56%           
====================================================================
  Files                                        ?       31           
  Lines                                        ?     4286           
  Branches                                     ?        0           
====================================================================
  Hits                                         ?     2296           
  Misses                                       ?     1990           
  Partials                                     ?        0           

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@joshlf
joshlf force-pushed the Ggsdoapsrkoab2sezv6aidvmzy46fo7pu branch from 974e511 to 336c96f Compare October 14, 2026 21:43
@joshlf
joshlf force-pushed the Gpvecn2gjh2spv5hy32nqxdlgiqp5jus7 branch from 0d5bdc5 to 28d6c6b Compare October 14, 2026 21:43
@joshlf
joshlf force-pushed the Gpvecn2gjh2spv5hy32nqxdlgiqp5jus7 branch from 28d6c6b to f5c26ca Compare October 15, 2026 00:40
@joshlf
joshlf force-pushed the Ggsdoapsrkoab2sezv6aidvmzy46fo7pu branch from aa3e5c0 to ca4b692 Compare October 15, 2026 01:19
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joshlf force-pushed the Gpvecn2gjh2spv5hy32nqxdlgiqp5jus7 branch 2 times, most recently from 2b395ee to 60fa265 Compare October 15, 2026 04:53
@joshlf
joshlf force-pushed the Ggsdoapsrkoab2sezv6aidvmzy46fo7pu branch from ca4b692 to 3f45436 Compare October 15, 2026 04:53
@joshlf
joshlf force-pushed the Gpvecn2gjh2spv5hy32nqxdlgiqp5jus7 branch from 60fa265 to 98d67b0 Compare October 15, 2026 14:22
Specify trailing-layout advancement, size offsets, wrapping padding and
dynamic-padding classification against the mathematical formulas.

Prove that a positive size-sequence comparison implies equal complete sizes
for every natural metadata count. Rejection remains conservative and does
not imply inequality. Add total Rust harnesses checking exact advancement
outcomes and the corresponding checked-size comparisons, preserving the
stronger unbounded theorem.

gherrit-pr-id: Gpvecn2gjh2spv5hy32nqxdlgiqp5jus7
Agent-authored-by: AI agent acting on joshlf's behalf

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