kean
CoreData crash on startup due to duplicated NSEntityDescriptions
Package: Pulse 5.1.4 Xcode: 16.4 iOS: 18.4 Environment: SwiftUI app using Pulse for logging
Issue
At app startup, the app crashes with a CoreData fatal error. CoreData reports multiple NSEntityDescriptions claiming the same Pulse entities, leading to a type-mismatch crash.
CoreData: warning: 'LoggerSessionEntity' (0x600003508790) from NSManagedObjectModel (0x6000021078e0) claims 'Pulse.LoggerSessionEntity'.
CoreData: warning: 'LoggerSessionEntity' (0x600003508790) from NSManagedObjectModel (0x6000021078e0) claims 'Pulse.LoggerSessionEntity'.
CoreData: warning: 'LoggerSessionEntity' (0x60000350c370) from NSManagedObjectModel (0x600002104b90) claims 'Pulse.LoggerSessionEntity'.
CoreData: warning: 'LoggerSessionEntity' (0x60000350c370) from NSManagedObjectModel (0x600002104b90) claims 'Pulse.LoggerSessionEntity'.
CoreData: debug: PostSaveMaintenance: incremental_vacuum with freelist_count - 1375 and pages_to_free 275
CoreData: warning: Multiple NSEntityDescriptions claim the NSManagedObject subclass 'Pulse.NetworkTaskEntity' so +entity is unable to disambiguate.
CoreData: warning: 'NetworkTaskEntity' (0x60000350c8f0) from NSManagedObjectModel (0x6000021078e0) claims 'Pulse.NetworkTaskEntity'.
CoreData: warning: 'NetworkTaskEntity' (0x600003500d10) from NSManagedObjectModel (0x600002104b90) claims 'Pulse.NetworkTaskEntity'.
CoreData: warning: Multiple NSEntityDescriptions claim the NSManagedObject subclass 'Pulse.LoggerMessageEntity' so +entity is unable to disambiguate.
CoreData: warning: Multiple NSEntityDescriptions claim the NSManagedObject subclass 'Pulse.NetworkRequestEntity' so +entity is unable to disambiguate.
Fatal error: NSArray element failed to match the Swift Array Element type
Expected LoggerBlobHandleEntity but found LoggerBlobHandleEntity
CoreData: warning: Multiple NSEntityDescriptions claim the NSManagedObject subclass 'Pulse.NetworkTransactionMetricsEntity' so +entity is unable to disambiguate.
Symptoms
On app launch, Pulse initializes its CoreData store. CoreData reports duplicated entity definitions (same entity class registered multiple times).
App crashes with a fatal error. NSArray element failed to match the Swift Array Element type Even though the class names appear identical, CoreData treats them as different entities from different models, causing a mismatch.
What I Checked
- There is only one Pulse package in my project (SPM).
- No custom CoreData models referencing Pulse entities.
- Clean build folder, remove derived data → crash persists.
- The crash seems related to Pulse loading multiple NSManagedObjectModels with the same entity names.
Do you happen to use some other tools with SDKs that track network requests? For example, Rocketsim?
