EXC_BAD_ACCESS when migrating an SQLite Core Data store in 10.6.x

Originator:iKenndac
Number:rdar://7347652 Date Originated:29th October 2009
Status:Open Resolved:
Product:Mac OS X Product Version:10.6.1
Classification:Crash/Hang/Data Loss Reproducible:Always
 
Summary:   

When migrating an SQLite data store, the application hangs in -[NSMigrationManager migrateStoreFromURL:type:options:withMappingModel:toDestinationURL:destinationType:destinationOptions:error:] with EXC_BAD_ACCESS.

  Steps to Reproduce:  

1. Open the included sample project in Xcode on Mac OS X 10.6.x and run it. Observe the results. 
2. Open the included sample project in Xcode on Mac OS X 10.5.8 and run it. Observe the results. 
3. There's no step three! 

 Expected Results: 

The migration to succeed (or fail gracefully).  

Actual Results:  On all versions of Mac OS X 10.6, the application hangs with EXC_BAD_ACCESS when migrating the store.   

Regression:  

This operation (and the included sample project) works as expected in Mac OS X 10.5.8.  

Sample project available here: http://dl.getdropbox.com/u/1399296/CoreDataCrashTest.zip

Comments

Workaround

The workaround in my case was to make sure I'm passing a valid error object to -migrateStoreFromURL:type:options:withMappingModel:toDestinationURL:destinationType:destinationOptions:error:. I was passing a nil error and something in Core Data was crashing when trying to dereference it. The appropriate information was added to my Radar report.

By iKenndac at Nov. 10, 2009, 11:45 a.m. (reply...)

Same probleme here!

The exact same problem/crash occurs in my project under 10.6 I did not test it under 10.5 yet if it works.

http://twitter.com/iKenndac/status/5283725252

Could you please share the solution?

By martin at Nov. 10, 2009, 10:23 a.m. (reply...)

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