[6.2] Allow '@unsafe' on import declarations to silence '@preconcurrency' warning #82444
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DougGregor
commented
Jun 24, 2025
DougGregor
commented
- Explanation: '@preconcurrency' imports open up memory safety holes with respect to Sendable, which are diagnosed under strict memory safety + strict concurrency checking. Allow one to write '@unsafe' on those imports to silence the diagnostic about it.
- Scope: Narrow. Only impacts a warning under strict memory safety + strict concurrency checking.
- Issues: rdar://154147698
- Original PRs: Allow '@unsafe' on import declarations to silence '@preconcurrency' warning #82443
- Risk: Very low. Very narrow change that doesn't impact much Swift code at all.
- Testing: CI, new test
…arning '@preconcurrency' imports open up memory safety holes with respect to Sendable, which are diagnosed under strict memory safety + strict concurrency checking. Allow one to write '@unsafe' on those imports to silence the diagnostic about it.
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@swift-ci please test |
bnbarham
approved these changes
Jun 24, 2025
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