Fix forward progress detection for lookaround groups#866
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natecook1000 merged 1 commit intoJul 21, 2026
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When a quantified concatenation begins with a lookaround group, the forward progress checker fails to skip over the assertion's child subtree, leaving the analysis cursor misaligned and leading to false positives. This change skips the lookaround's child subtree, matching the treatment added for nullable quantifications in swiftlang#851.
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@swift-ci Please test Linux platform |
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Thanks for this fix, @ekassos! |
This was referenced Jul 21, 2026
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When a quantified concatenation begins with a lookaround group, the forward progress checker fails to skip over the assertion's child subtree, leaving the analysis cursor misaligned and leading to false positives.
This change skips the lookaround's child subtree, matching the treatment added for nullable quantifications in #851.
Fixes #865.