[5.7][stdlib] Fix handling of duplicate items in generic Set.intersection#59422
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lorentey merged 1 commit intoswiftlang:release/5.7from Jun 14, 2022
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If the sequence passed to `Set.intersection` has exactly as many duplicate items as items missing from `self`, then the new implementation in 5.6 will mistakenly return `self` unchanged. (It counts duplicate hits as distinct items in the result.) rdar://94803458 (cherry picked from commit 01d7b57)
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stephentyrone
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Jun 14, 2022
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(cherry picked from #59417)
Set.intersectionhas exactly as many duplicate items as items missing fromself, then the implementation that shipped in 5.6 mistakenly returnsselfunchanged. (It counts duplicate hits as distinct items in the result.)Set.intersectoverloads in the Swift Standard Library