v4.3.1

Enhancements

• Reduce the encrypted page reclaimer's impact on battery life when encryption is used. (Core #3461).

Fixed

• macOS binaries were built with the incorrect deployment target (10.14 rather than 10.9), resulting in linker warnings. (#6299, since 3.18.0).
• An internal datastructure for List properties could be double-deleted if the last reference was released from a thread other than the one which the List was created on at the wrong time. This would typically manifest as "pthread_mutex_destroy() failed", but could also result in other kinds of crashes. (#6333).
• Sorting on float or double properties containing NaN values had inconsistent results and would sometimes crash due to out-of-bounds memory accesses. (#6357).
• A NOT query on a List<Object> which happened to have the objects in a different order than the underlying table would sometimes include the object immediately before an object which matches the query. (#6289, since 0.90.0).

Compatibility

• File format: Generates Realms with format v9 (Reads and upgrades all previous formats)
• Realm Object Server: 3.21.0 or later.
• Carthage release for Swift is built with Xcode 11.3.

Internal

• Upgraded realm-core from 5.23.6 to 5.23.8.
• Upgraded realm-sync from 4.9.0 to 4.9.4.