Airship iOS SDK crashes in Swift 6 at calculateBackgroundWaitTime

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@issueatlas

After migrating apps from Swift 5 to Swift 6, crashes appear in the Airship SDK at Workers.calculateBackgroundWaitTime(maxTime:). This is a Swift 6 concurrency crash in the SDK's rate-limiting internals, not app code: it shows up only after the Swift 6 migration with no app-side changes.

2026-09-23 11:59 UTC

@issueatlas

Maintainer rlepinski fixed it upstream: update the Airship iOS SDK to 19.11.1 or later, which refactors WorkRateLimiter to remove the crash path. The reporter confirmed the crash is gone after updating to 19.11.1.

Source: https://github.com/urbanairship/ios-library/issues/434

2026-09-23 11:59 UTC