How can crashes of Safari extensions on Mojave be avoided?

Question

When I build my macOS application that has an Safari extension in it, which I run on Safari, it crashes after a couple of seconds of running (though it does show up in the extensions).

It seems to be a problem of Safari trying to obtain data from the local Library folder. It also seems to struggle with Info.plist.

Here is the crash log:

2018-08-02 17:33:47.464379+0200 Safari[14693:1179568] [default] Unable to load Info.plist exceptions (eGPUOverrides)
2018-08-02 17:33:47.487993+0200 Safari[14693:1179565] [SQLiteStore] Failed to acquire database store coordination lock at /Users/lukasmuller/Library/Safari/Favicon Cache/favicons.db-lock: [35: Resource temporarily unavailable]
2018-08-02 17:33:47.488150+0200 Safari[14693:1179565] [SQLiteStore] Failed to acquire exclusive access to database at file:///Users/lukasmuller/Library/Safari/Favicon%20Cache/favicons.db.
2018-08-02 17:33:47.488580+0200 Safari[14693:1179565] [SQLiteStore] Failed to acquire database store coordination lock at /Users/lukasmuller/Library/Safari/Favicon Cache/favicons.db-lock: [35: Resource temporarily unavailable]
2018-08-02 17:33:47.488615+0200 Safari[14693:1179565] [SQLiteStore] Failed to acquire exclusive access to database at file:///Users/lukasmuller/Library/Safari/Favicon%20Cache/favicons.db.
2018-08-02 17:33:47.488694+0200 Safari[14693:1179565] [SQLiteStore] Falling back to an in-memory store
2018-08-02 17:33:47.489617+0200 Safari[14693:1179565] [FaviconPersistence] Using in-memory representation for database /Users/lukasmuller/Library/Safari/Favicon Cache/favicons.db
2018-08-02 17:33:47.505346+0200 Safari[14693:1179572] [SQLiteStore] Failed to acquire database store coordination lock at /Users/lukasmuller/Library/Containers/com.apple.Safari/Data/Library/Caches/com.apple.Safari/TabSnapshots/Metadata.db-lock: [35: Resource temporarily unavailable]
2018-08-02 17:33:47.505870+0200 Safari[14693:1179572] [SQLiteStore] Failed to acquire exclusive access to database at file:///Users/lukasmuller/Library/Containers/com.apple.Safari/Data/Library/Caches/com.apple.Safari/TabSnapshots/Metadata.db.
2018-08-02 17:33:47.572816+0200 Safari[14693:1179583] flock failed to lock maps file: errno = 35
2018-08-02 17:33:47.573799+0200 Safari[14693:1179583] flock failed to lock maps file: errno = 35
2018-08-02 17:33:47.604115+0200 Safari[14693:1179588] Failed to acquire exclusive access to AutoFill corrections SQLite store at AutoFillCorrections.db.
Failed to acquire exclusive access to AutoFill corrections SQLite store at AutoFillCorrections.db.
2018-08-02 17:33:47.607520+0200 Safari[14693:1179588] Failed to acquire exclusive access to AutoFill corrections SQLite store at CloudAutoFillCorrections.db.
Failed to acquire exclusive access to AutoFill corrections SQLite store at CloudAutoFillCorrections.db.
2018-08-02 17:33:47.608239+0200 Safari[14693:1179588] Failed to acquire exclusive access to AutoFill corrections SQLite store at AutoFillCorrections.db.
Failed to acquire exclusive access to AutoFill corrections SQLite store at AutoFillCorrections.db.
2018-08-02 17:33:47.609424+0200 Safari[14693:1179588] Failed to acquire exclusive access to AutoFill corrections SQLite store at CloudAutoFillCorrections.db.
Failed to acquire exclusive access to AutoFill corrections SQLite store at CloudAutoFillCorrections.db.
2018-08-02 17:33:47.857619+0200 Safari[14693:1179579] Failed to acquire exclusive access to AutoFill corrections SQLite store at AutoFillCorrections.db.
Failed to acquire exclusive access to AutoFill corrections SQLite store at AutoFillCorrections.db.
2018-08-02 17:33:47.859043+0200 Safari[14693:1179565] [CrowdsourcedAutoFill] Unable to read cloud AutoFill correction sets, error: Error Domain=NSCocoaErrorDomain Code=260 "The file couldn’t be opened because it doesn’t exist."
2018-08-02 17:33:47.859839+0200 Safari[14693:1179579] Failed to acquire exclusive access to AutoFill corrections SQLite store at CloudAutoFillCorrections.db.
Failed to acquire exclusive access to AutoFill corrections SQLite store at CloudAutoFillCorrections.db.
2018-08-02 17:33:47.871122+0200 Safari[14693:1179640] [CloudBookmarks] Error fetching remote migration state: Error Domain=com.apple.SafariBookmarksSync.CloudBookmarksErrorDomain Code=0 "(null)"
2018-08-02 17:33:47.953061+0200 Safari[14693:1179640] [RemotePlistController] The downloaded plist could not be loaded: Error Domain=NSCocoaErrorDomain Code=260 "The file couldn’t be opened because it doesn’t exist."
2018-08-02 17:33:48.191583+0200 Safari[14693:1179568] [trace] RWIMobileDeviceConnection (Direct): Unable to start a session: The host is not paired with the device.
2018-08-02 17:33:48.202902+0200 Safari[14693:1179568] [trace] RWIMobileDeviceConnection (Direct): Unable to stop session: The session is inactive.
2018-08-02 17:33:48.234006+0200 Safari[14693:1179572] Failed to acquire exclusive access to AutoFill corrections SQLite store at AutoFillCorrections.db.
Failed to acquire exclusive access to AutoFill corrections SQLite store at AutoFillCorrections.db.
2018-08-02 17:33:48.235327+0200 Safari[14693:1179572] Failed to acquire exclusive access to AutoFill corrections SQLite store at CloudAutoFillCorrections.db.
Failed to acquire exclusive access to AutoFill corrections SQLite store at CloudAutoFillCorrections.db.
2018-08-02 17:33:52.195337+0200 Hockey Crahses to Jira[14702:1180067] [default] Unable to load Info.plist exceptions (eGPUOverrides)
2018-08-02 17:30:28.465503+0200 Hockey Crashes to Jira[14575:1165922] [default] Unable to load Info.plist exceptions (eGPUOverrides)
2018-08-02 17:30:43.565677+0200 Hockey Crashes to Jira[14575:1165922] [default] Unable to load Info.plist exceptions (eGPUOverrides)

Has anyone faced similar problems and has figured out a way of fixing it?

Answer 1

I have the same (random) problem. It seems the problem disappears after a cleaning of the project (Product/Clean) and of the build folder (Alt on Product/Clean menu)

However the message "[default] Unable to load Info.plist exceptions (eGPUOverrides)" is still present... It does not seem to be relavant since everything works fine.

I have created a Slack community for Safari App Extensions devs, you are welcome to join us: https://slofile.com/slack/safariappextdevs