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CLMonitor init function causes app crash
I'm experiencing app crashes when calling the CLMonitor initialization function: let monitor = await CLMonitor("my_monitor") According to WWDC 2023: Meet Core Location Monitor, when creating a CLMonitor object with the same identifier, it should access the existing monitor without any mention of app crashes or buggy behavior. However, in my actual testing, attempting to create a CLMonitor object with the same identifier immediately causes an app crash. Here's part of the crash log: Last Exception Backtrace: 0 CoreFoundation 0x19c4ab21c __exceptionPreprocess + 164 (NSException.m:249) 1 libobjc.A.dylib 0x199945abc objc_exception_throw + 88 (objc-exception.mm:356) 2 Foundation 0x19b7a9670 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 288 (NSException.m:252) 3 CoreLocation 0x1aa25cbb4 +[CLMonitor _requestMonitorWithConfiguration:locationManager:completion:] + 516 (CLMonitor.mm:516) 4 libswiftCoreLocation.dylib 0x22bf6085c CLMonitor.init(_:) + 488 (CLMonitor.swift:280) 5 libswiftCoreLocation.dylib 0x22bf604b9 <deduplicated_symbol> + 1 6 MiniPlengi 0x106372ec9 closure #1 in static CLMonitor.loplatMonitor.getter + 1 (CLMonitor+Extensions.swift:31) 7 MiniPlengi 0x1062ce325 0x106290000 + 254757 8 MiniPlengi 0x1062f6a29 specialized thunk for @escaping @isolated(any) @callee_guaranteed @async () -> (@out A) + 1 (/<compiler-generated>:0) 9 MiniPlengi 0x1062ce325 0x106290000 + 254757 10 libswift_Concurrency.dylib 0x1a7f75241 completeTaskWithClosure(swift::AsyncContext*, swift::SwiftError*) + 1 (Task.cpp:537) Furthermore, even though I've written code to create CLMonitor objects based on a singleton structure to handle these crash cases, the app still crashes: extension CLMonitor { static var loplatMonitor: CLMonitor { get async { struct Static { static var monitor: CLMonitor? static var initializationTask: Task<CLMonitor, Never>? } // If already initialized if let monitor = Static.monitor { return monitor } // If there's an initialization task in progress, wait for its result if let task = Static.initializationTask { return await task.value } // Create new initialization task let task = Task { let monitor = await CLMonitor("my_monitor") Static.monitor = monitor Static.initializationTask = nil // Clean up task after completion return monitor } Static.initializationTask = task return await task.value } } } Is the CLMonitor API still in a stabilization phase and not recommended for production release? I would appreciate guidance on the correct usage. If these issues are expected to persist, I'm wondering if I should continue using the existing CLCircularRegion API instead. Any insights or recommendations would be greatly appreciated.
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Sep ’25