Availability of TaskLocal

Using Swift
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1

I'm getting a crash on iOS 14.2.0 when app tries to access a @TaskLocal variable:

public class Clock {
    @TaskLocal
    public static var current: Clock = SystemClock()
        
    public var now: Date {
        fatalError("Abstract")
    }
}

private final class SystemClock: Clock {    
    override var now: Date { Date() }
}

Crashed: com.apple.root.default-qos
EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000000000000


0  libswiftCore.dylib             0x38d508 swift::ResolveAsSymbolicReference::operator()(swift::Demangle::SymbolicReferenceKind, swift::Demangle::Directness, int, void const*) + 120
1  libswiftCore.dylib             0x3a7f8c swift::Demangle::Demangler::demangleSymbolicReference(unsigned char) + 208
2  libswiftCore.dylib             0x3a4e1c swift::Demangle::Demangler::demangleType(llvm::StringRef, std::__1::function<swift::Demangle::Node* (swift::Demangle::SymbolicReferenceKind, swift::Demangle::Directness, int, void const*)>) + 200
3  libswiftCore.dylib             0x392db8 swift_getTypeByMangledNameImpl(swift::MetadataRequest, llvm::StringRef, void const* const*, std::__1::function<swift::TargetMetadata<swift::InProcess> const* (unsigned int, unsigned int)>, std::__1::function<swift::TargetWitnessTable<swift::InProcess> const* (swift::TargetMetadata<swift::InProcess> const*, unsigned int)>) + 480
4  libswiftCore.dylib             0x39040c swift::swift_getTypeByMangledName(swift::MetadataRequest, llvm::StringRef, void const* const*, std::__1::function<swift::TargetMetadata<swift::InProcess> const* (unsigned int, unsigned int)>, std::__1::function<swift::TargetWitnessTable<swift::InProcess> const* (swift::TargetMetadata<swift::InProcess> const*, unsigned int)>) + 604
5  libswiftCore.dylib             0x390648 swift_getTypeByMangledNameInContext + 148
6  Booking.com                    0x7d5868 __swift_instantiateConcreteTypeFromMangledName
7  libdispatch.dylib              0x3db0 _dispatch_client_callout + 20
8  libdispatch.dylib              0x55c8 _dispatch_once_callout + 32
9  libswiftCore.dylib             0x399604 swift_once + 48
10 MyApp                          0x351fd58 static Clock.current.getter

Built using Xcode 14.2 with deployment target set to iOS 14.1.

Is TaskLocal unavailable on iOS 14.2? I'm not getting any availability errors or warnigns when building the app.

2

NVM, looks like it's an issue of our CI. Back-deployment framework is not embedded properly.