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SIL: Workaround for GenericSignatureBuilder bug #40583

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Merged
merged 1 commit into from
Dec 16, 2021

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slavapestov
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The GSB will drop same-type requirements sometimes, when the
right hand side is smaller than the left. Change the order
when adding these requirements, which seems to work well
enough for my reduced testcase.

Also, ensure that everything works correctly with the
RequirementMachine, which doesn't have the same underlying
problems with same-type requirement handling.

Fixes rdar://86431977.

The GSB will drop same-type requirements sometimes, when the
right hand side is smaller than the left. Change the order
when adding these requirements, which seems to work well
enough for my reduced testcase.

Also, ensure that everything works correctly with the
RequirementMachine, which doesn't have the same underlying
problems with same-type requirement handling.

Fixes rdar://86431977.
@slavapestov
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@swift-ci Please smoke test

@slavapestov
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@swift-ci Please test source compatibility

@slavapestov
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@swift-ci Please smoke test macOS

@slavapestov slavapestov merged commit b025679 into swiftlang:main Dec 16, 2021
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