Crash on iOS 13 devices related to NSClassFromString

Question

I am getting crash on iOS13 devices with a following crash log

Crashed: BSXPCCnx:com.apple.frontboard.systemappservices (BSCnx:client:com.apple.frontboard.workspace-service)
EXC_BAD_ACCESS 0x0000000104a1c458

App has Firebase, Facebook and Realm SDK which uses NSClassFromString. 96% crashes have occurred when app is in the background state.

We used NSFileProtectionComplete for data protection

One solution suggested on Apple Forum is, if NSFileProtectionComplete in entitlements, use NSFileProtectionCompleteUntilFirstUserAuthentication, then locking specific directories with NSFileProtectionComplete. But not sure this solution will work or not as not able to reproduce the crash. Any help will be really appreciated

Answer 1

With iOS 13.2 beta 3, the crash is not reproducible with above-mentioned step. Looks like the issue was from Apple and they have taken care in 13.2 release