I'm still getting this error (SwiftData/ModelContext.swift:3253: Fatal error: Failed to identify a store that can hold instances of SwiftData._KKMDBackingData<Presents_2024.Item> from [:]) in Xcode 16.1 Beta (16B5001e).
The app works for a limited amount of time and then crashes with this error. It looks like the SwiftData model isn't being created properly and when a context is saved it crashes.
Can you tell me if this error will be fixed in the next beta?
Here's the output of the debug error when it crashes:
I'm also receiving the following failed assertion:
wiftData/ModelContext.swift:3253: Fatal error: Failed to identify a store that can hold instances of SwiftData._KKMDBackingData<Presents_2024.Item> from [:]
error: Assertion failed: (byte_size > 0 && byte_size <= 8 && "GetMaxU64 invalid byte_size!"), function GetMaxU64, file DataExtractor.cpp, line 527
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0 LLDB 0x0000000115319aac llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56
1 LLDB 0x0000000114e7a198 lldb_private::lldb_assert(bool, char const*, char const*, char const*, unsigned int) + 148
2 LLDB 0x0000000114e73818 lldb_private::DataExtractor::GetMaxU64(unsigned long long*, unsigned long) const + 72
3 LLDB 0x0000000114d7ded0 lldb_private::CompilerType::GetValueAsScalar(lldb_private::DataExtractor const&, unsigned long long, unsigned long, lldb_private::Scalar&, lldb_private::ExecutionContextScope*) const + 304
4 LLDB 0x0000000114cb9b9c lldb_private::Value::ResolveValue(lldb_private::ExecutionContext*, lldb_private::Module*) + 388
5 LLDB 0x0000000114cbc93c lldb_private::ValueObject::ResolveValue(lldb_private::Scalar&) + 104
6 LLDB 0x0000000114cbf814 lldb_private::ValueObject::GetValueAsSigned(long long, bool*) + 140
7 LLDB 0x0000000114b4fba8 lldb::SBValue::GetValueAsSigned(long long) + 160
8 lldb-rpc-server 0x0000000100c5fe70 rpc_server::_ZN4lldb7SBValue16GetValueAsSignedEx::HandleRPCCall(rpc_common::Connection&, rpc_common::RPCStream&, rpc_common::RPCStream&) + 92
9 lldb-rpc-server 0x0000000100c6a2b8 rpc_common::Connection::PrivateHandleRPCPacket(rpc_common::RPCPacket&, rpc_common::RPCPacket&, bool&) + 628
10 lldb-rpc-server 0x0000000100c6de8c Packets::ProcessPackets() + 564
11 lldb-rpc-server 0x0000000100c6dbf4 Packets::ReadThread() + 276
12 lldb-rpc-server 0x0000000100c6dad4 Packets::RunReadThread(void*) + 12
13 libsystem_pthread.dylib 0x00000001904f72e4 _pthread_start + 136
14 libsystem_pthread.dylib 0x00000001904f20fc thread_start + 8
Please file a bug report against lldb reporting this failure log, and as many details as possibleerror: Assertion failed: (byte_size > 0 && byte_size <= 8 && "GetMaxU64 invalid byte_size!"), function GetMaxU64, file DataExtractor.cpp, line 527
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0 LLDB 0x0000000115319aac llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56
1 LLDB 0x0000000114e7a198 lldb_private::lldb_assert(bool, char const*, char const*, char const*, unsigned int) + 148
2 LLDB 0x0000000114e73818 lldb_private::DataExtractor::GetMaxU64(unsigned long long*, unsigned long) const + 72
3 LLDB 0x0000000114d7ded0 lldb_private::CompilerType::GetValueAsScalar(lldb_private::DataExtractor const&, unsigned long long, unsigned long, lldb_private::Scalar&, lldb_private::ExecutionContextScope*) const + 304
4 LLDB 0x0000000114cb9b9c lldb_private::Value::ResolveValue(lldb_private::ExecutionContext*, lldb_private::Module*) + 388
5 LLDB 0x0000000114cbc93c lldb_private::ValueObject::ResolveValue(lldb_private::Scalar&) + 104
6 LLDB 0x0000000114cbf6ec lldb_private::ValueObject::GetValueAsUnsigned(unsigned long long, bool*) + 140
7 LLDB 0x0000000114b4fcc0 lldb::SBValue::GetValueAsUnsigned(unsigned long long) + 160
8 lldb-rpc-server 0x0000000100c5ff18 rpc_server::_ZN4lldb7SBValue18GetValueAsUnsignedEy::HandleRPCCall(rpc_common::Connection&, rpc_common::RPCStream&, rpc_common::RPCStream&) + 92
9 lldb-rpc-server 0x0000000100c6a2b8 rpc_common::Connection::PrivateHandleRPCPacket(rpc_common::RPCPacket&, rpc_common::RPCPacket&, bool&) + 628
10 lldb-rpc-server 0x0000000100c6de8c Packets::ProcessPackets() + 564
11 lldb-rpc-server 0x0000000100c6dbf4 Packets::ReadThread() + 276
12 lldb-rpc-server 0x0000000100c6dad4 Packets::RunReadThread(void*) + 12
13 libsystem_pthread.dylib 0x00000001904f72e4 _pthread_start + 136
14 libsystem_pthread.dylib 0x00000001904f20fc thread_start + 8
Please file a bug report against lldb reporting this failure log, and as many details as possible
Also getting these errors that might be related... 🤔
SwiftData/DefaultStore.swift:442: Fatal error: API Contract Violation: Editors must register their identifiers before invoking operations on this store SwiftData.DefaultStore: 68B5BA57-CC77-4EB2-AF60-60EE36D4B962 did not.
error: the replacement path doesn't exist: "/var/folders/6z/x5z1g5jx7bz8sd27794j7bpw0000gn/T/swift-generated-sources/@__swiftmacro_13Presents_20248ItemListV5items33_26959148E02528011C522F13E1D6E443LL5QueryfMa_.swift"
error: the replacement path doesn't exist: "/var/folders/6z/x5z1g5jx7bz8sd27794j7bpw0000gn/T/swift-generated-sources/@__swiftmacro_13Presents_20248ItemListV5items33_26959148E02528011C522F13E1D6E443LL5QueryfMa_.swift"
Can't show file for stack frame : <DBGLLDBStackFrame: 0x16bdfce20> - stackNumber:15 - name:ItemList.items.getter. The file path does not exist on the file system: /var/folders/6z/x5z1g5jx7bz8sd27794j7bpw0000gn/T/swift-generated-sources/@__swiftmacro_13Presents_20248ItemListV5items33_26959148E02528011C522F13E1D6E443LL5QueryfMa_.swiftCan't show file for stack frame : <DBGLLDBStackFrame: 0x16bdfce20> - stackNumber:15 - name:ItemList.items.getter. The file path does not exist on the file system: /var/folders/6z/x5z1g5jx7bz8sd27794j7bpw0000gn/T/swift-generated-sources/@__swiftmacro_13Presents_20248ItemListV5items33_26959148E02528011C522F13E1D6E443LL5QueryfMa_.swift
Here's how I initialize the SwiftData store using DocumentGroup. Please let me know if I need to provide any future info. Bug logged as Feedback (FB15100795)
//
// Presents_2024App.swift
// Presents 2024
//
// Created by Benjamin Lee on 07/06/2024.
//
import RichTextKit
import SwiftData
import SwiftUI
import UniformTypeIdentifiers
@main
struct Presents_2024App: App {
// MARK: Properties
#if os(iOS)
@UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
#elseif os(macOS)
@NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
#endif
@Environment(\.modelContext) private var modelContext
@FocusState private var isFocused: Bool
@StateObject private var transientSettings = TransientSettings()
// MARK: Computed Properties
var body: some Scene {
#if os(iOS)
DocumentGroupLaunchScene("Present's 2024") {
NewDocumentButton("New Activity...")
} background: {
Image(.background)
.resizable()
.scaledToFill()
.ignoresSafeArea()
} overlayAccessoryView: { _ in
AccessoryView()
}
#endif
DocumentGroup(editing: .presentsDocument,
migrationPlan: Presents_2024MigrationPlan.self,
editor: {
RootView()
.environmentObject(appDelegate)
.environmentObject(transientSettings)
.focused($isFocused)
.onAppear {
isFocused = true
DispatchQueue.main.async {
// Here, you might need to enforce the focus on the RootView
#if os(macOS)
if let window = NSApplication.shared.windows.first {
window.makeFirstResponder(window.contentView)
}
#endif
}
}
.onKeyPress(.leftArrow) {
DispatchQueue.main.async {
if transientSettings.selectedTab > 0 {
transientSettings.selectedTab -= 1
}
print("⬅️ pressed")
}
return .handled
}
.onKeyPress(.rightArrow) {
DispatchQueue.main.async {
if transientSettings.selectedTab < transientSettings.numberOfItems - 1 {
transientSettings.selectedTab += 1
}
print("➡️ pressed")
}
return .handled
}
},
prepareDocument: { context in
// Prepare the document before it is opened or edited.
// Insert example Bookend Item
let newBookend = Bookend(firstLine: NSAttributedString(""), secondLine: NSAttributedString(""), thirdLine: NSAttributedString(""), bookendType: .welcome)
let newItem = Item(itemText: "A Bookend Video", itemType: .bookend, order: 0)
newItem.bookends.append(newBookend)
context.insert(newItem)
// Insert example Question Item
let question = Question(questionText: NSAttributedString("An Example Question"))
let item = Item(itemText: "An Example Question", itemType: .question, order: 1)
item.questions.append(question)
context.insert(item)
context.insert(Brand.defaultBrand)
})
// .commands {
// SidebarCommands()
// #if os(macOS)
//// AboutCommand()
// #endif
// RichTextCommand.FormatMenu()
//
//// CommandMenu("RichTextKit") {
//// DemoUrl.github.link
//// DemoUrl.documentation.link
//// }
// }
}
}
extension UTType {
static var presentsDocument: UTType {
UTType(exportedAs: "eu.makeitso.presentsdocument")
}
}
struct Presents_2024MigrationPlan: SchemaMigrationPlan {
static var schemas: [VersionedSchema.Type] = [Presents_2024VersionedSchema.self]
static var stages: [MigrationStage] = []
}
struct Presents_2024VersionedSchema: VersionedSchema {
static var versionIdentifier = Schema.Version(1, 0, 0)
static var models: [any PersistentModel.Type] = [Item.self, UserSettings.self, Brand.self]
}
#Preview(traits: .sampleData) {
@Previewable @State var appDelete = AppDelegate()
@Previewable @State var transientSettings = TransientSettings()
RootView()
.environmentObject(appDelete)
.environmentObject(transientSettings)
}
Have you made any progress on this? I too am seeing these errors after updating to Xcode 16, IOS 18, and macOS 15.0
I have the same issue. Has anyone found a workaround?
I have had some success by implementing manual saves using modelContext.transaction() whenever interacting with the model.
I'm having the same issue: random crashes after a few minutes of the app running, and a "Failed to identify a store that can hold instances of SwiftData" error.
I get the same error only while debugging. When I run on device it runs for a while then crashes.