Fix crashes caused by a race condition in icu::OlsonTimeZone::initTransitionRules #1597
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…nsitionRules ICU's `UTimeZone` isn't actually thread safe. Lock around the access. I was able to reproduce the UAF crash by calling uatimezone API concurrently. With this fix, I no longer reproduce the crash. 164388304
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@swift-ci please test |
jmschonfeld
approved these changes
Nov 13, 2025
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@swift-ci please test |
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@swift-ci please test macOS platform |
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ICU's
UTimeZoneisn't actually thread safe. Lock around the access.I was able to reproduce the UAF crash by calling uatimezone API concurrently. With this fix, I no longer reproduce the crash.
164388304