Fix ABI mismatch involving Sendable-refining non-resilient protocols and deployment targets #76380
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… targets A change to the way we determined whether a protocol conformance is "dependent" for marker protocols caused an ABI break for Sendable-refining protocols built with pre-6.0 Swift compilers. The fix for this issue (swiftlang#75769) gated the change on deployment target. The deployment target change fixed the original problem, then caused a related issue when a project mixes deployment targets (pre-6.0 and 6.0+) with non-resilient protocols. Exempt non-resilient protocols from this change so we get consistent behavior. Fixes rdar://134953989.
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This was referenced Sep 10, 2024
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A change to the way we determined whether a protocol conformance is "dependent" for marker protocols caused an ABI break for Sendable-refining protocols built with pre-6.0 Swift compilers. The fix for this issue (#75769) gated the change on deployment target.
The deployment target change fixed the original problem, then caused a related issue when a project mixes deployment targets (pre-6.0 and 6.0+) with non-resilient protocols. Exempt non-resilient protocols from this change so we get consistent behavior.
Fixes rdar://134953989.