[6.2] [CS] Ensure type variables are eliminated by Solution::simplifyType
#82775
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`TypeSimplifier` may not eliminate type variables from e.g the pattern types of pattern expansion types since they can remain unresolved due to e.g having a placeholder count type. Make sure we eliminate any remaining type variables along with the placeholders. There's probably a more principled fix here, but this is a quick and low risk fix we can hopefully take for 6.2. rdar://154954995
hamishknight
added
🍒 release cherry pick
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@swift-ci please test |
bnbarham
approved these changes
Jul 3, 2025
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6.2 cherry-pick of #82770