fix(patmat): Use childPrefix to resolve path-dependent sealed children #23771
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nox213
commented
Aug 17, 2025
| val parentPre = parent.normalizedPrefix | ||
| val defaultRef = if (child.isTerm) child.termRef else child.typeRef | ||
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| if (parentSym.isClass && parentPre.isInstanceOf[TermRef]) { |
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guard for match types and cases without prefix
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I will look into CI failure |
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fix #23369
This PR fixes an issue where path-dependent types were not resolved correctly when calculating the space of a scrutinee's children for exhaustiveness checking. The type checking was performed from the perspective of the child's definition-site (Module), which failed to account for type members refined at the use-site.