removeExistingStore not removing associated .sqlite-shm and .sqlite-wal files

[deemadden]

New issue checklist

• I have read all of the README and documentation.
• I have reviewed the contributing guidelines.
• I have searched existing issues and this is not a duplicate.

General information

• Library version(s): 4.0.1
• OS version(s): 9.3.1
• Devices/Simulators affected: I've only tried it on a 6s and 6s Plus
• Reproducible in the demo project (Yes/No): Yes
• Related issues: Affects creating a stack from the CoreDataStackFactory using createStack()

Expected behavior

Should be able to rebuild an empty model and create a stack by calling createStack() after calling removeExistingStore on CoreDataModel

Actual behavior

Fails, throwing a bunch of model errors (see below). I was able to resolve the issue by deleting the model's associated .sqlite-shm an .sqlite-wal files (these are files auto generated at sqlite db creation time in newer versions of iOS)

I was able to determine that deleting the .sqlite-shm and .sqlite-wal files - which live in /Documents, right next to the .sqlite database - fixed the problem.

Steps to reproduce

Call removeExistingStore on your current core data model, attempt to rebuild somewhere thereafter by rebuilding your core data stack using CoreDataStackFactory's createStack()

Crash log? Screenshots? Videos? Sample project?

Error as it appears in the console:
CoreData: error: (522) I/O error for database at [path to sqlite db]. SQLite error code:522, 'not an error' 2016-06-04 15:12:58.537 Golf[6313:1458291] CoreData: error: -addPersistentStoreWithType:SQLite configuration:(null) URL:file:///[path to sqlite db] options:{ NSInferMappingModelAutomaticallyOption = 1; NSMigratePersistentStoresAutomaticallyOption = 1; } ... returned error Error Domain=NSCocoaErrorDomain Code=522 "(null)" UserInfo={NSSQLiteErrorDomain=522, NSUnderlyingException=I/O error for database at [path to sqlite db]. SQLite error code:522, 'not an error'} with userInfo dictionary { NSSQLiteErrorDomain = 522; NSUnderlyingException = "I/O error for database at [path to sqlite db]. SQLite error code:522, 'not an error'"; }

[jessesquires]

Thanks so much @deemadden ! 👍

I'll get this fixed soon, and release 4.0.2 — unless you want to submit a PR.

[deemadden]

Sure @jessesquires I pretty much have the fix written. I can find the spot to put it and submit one.

[jessesquires]

Notes on sqlite temp files:
https://www.sqlite.org/tempfiles.html

[deemadden]

Thanks @jessesquires