I am seeing a weird crash from Xcode 27 Beta 3 when building a variadic type DynamicProperty that also needs SwiftUI.State. This does not crash from Xcode 26. Here is a repro: import SwiftUI struct Repeater: DynamicProperty { @State private var storage = Storage() private var input: (repeat each Input) init(_ input: repeat each Input) { self.input = (repeat each input) } } extension Repeater { final class Storage { } } @main struct CrashDemoApp: App { private var repeater = Repeater(1) var body: some Scene { WindowGroup { EmptyView() } } } Here is the crash: Thread 1 Queue : com.apple.main-thread (serial) #0 0x000000019a93aec0 in swift::TargetMetadata::isCanonicalStaticallySpecializedGenericMetadata () #1 0x000000019a946b38 in performOnMetadataCache () #2 0x000000019a8c85f0 in swift_checkMetadataState () #3 0x00000001004a2c78 in type metadata completion function for Repeater () #4 0x000000019a94cfe4 in swift::GenericCacheEntry::tryInitialize () #5 0x000000019a94c870 in swift::MetadataCacheEntryBase::
Topic:
UI Frameworks
SubTopic:
SwiftUI
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