Backport "Use upper bound of abstract types in exhaustivity checking" to 3.3 LTS #639
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closes scala#23620, scala#24246 If the upper bound of an abstract type is not `sealed` but is effectively sealed, it is not handled correctly, since classSym could return a type that is not `sealed` (Object in the issue above). If the type were not abstract, it would pass the logic that checks whether it is an Or, And, etc., and would be handled properly. This PR makes exhaustivity checking use the upper bound of abstract types that are effectively sealed. --------- Co-authored-by: Zieliński Patryk <[email protected]>
closes scala#23620, scala#24246 If the upper bound of an abstract type is not `sealed` but is effectively sealed, it is not handled correctly, since classSym could return a type that is not `sealed` (Object in the issue above). If the type were not abstract, it would pass the logic that checks whether it is an Or, And, etc., and would be handled properly. This PR makes exhaustivity checking use the upper bound of abstract types that are effectively sealed. --------- Co-authored-by: Zieliński Patryk <[email protected]> [Cherry-picked 520668f][modified]
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Backports scala#23909 to the 3.3.7.
PR submitted by the release tooling.
[skip ci]