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Fix/exclusive range bounds 730 - #738
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1932819331hy-debug wants to merge 3 commits into
Open
1932819331hy-debug wants to merge 3 commits into
1932819331hy-debug wants to merge 3 commits into
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) Align exclusive and inclusive range lowering, retain outer bound reads under shadowing, and remove non-existent bound reads from loop back-edge analysis. Add regression shapes for shadowing, mutation, and side-effecting bounds. AI-assisted change; requires independent CI and end-to-end verification.
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Fixes #730.
Root cause
Exclusive integer ranges previously re-evaluated their upper bound on every iteration, after the loop variable was introduced.
This caused incorrect behavior under variable shadowing, mutable bounds, and side-effecting expressions. Inclusive ranges already captured their bounds once, creating inconsistent semantics.
Changes
Verification
Fork validation PR: 1932819331hy-debug#6
Successful CI: https://github.com/1932819331hy-debug/Go-Hybrid/actions/runs/39175226566
Both quick and compiler jobs passed, including Rust workspace tests, checker corpus, differential tests, and Go integration checks.
AI-assisted implementation. Credit for the original bug report belongs to the reporter of #730.