Work around compiler bug affecting macro decls with #if-guarded availability when building w/legacy driver #1106
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…ability when building w/legacy driver
stmontgomery
requested review from
briancroom,
grynspan and
suzannaratcliff
as code owners
stmontgomery
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bug
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@swift-ci please test |
grynspan
approved these changes
May 7, 2025
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This works around a Swift compiler bug which causes a failure validating the generated .swiftinterface of the
Testingmodule due to it having macro declarations with#if-conditionalized@available(...)attributes before any other@-attributes.The PR which recently landed to enable the Exit Tests feature (#324) revealed this compiler bug — specifically, that PR removed
@_spiattributes which until then preceded#if SWT_NO_EXIT_TESTS. The workaround is to move other attributes on the affected macro declarations up before the#if.The compiler bug is being fixed in swiftlang/swift#81346. It only appears to happen when building with the legacy driver, and Android uses that driver still. An example CI failure log can be found here:
Checklist: