Xcode 13 Beta 5 warning about NSKeyedUnarchiver validateAllowedClass

[jorydekort]

My environment

• Xcode version: Xcode 13 beta 5
• Firebase SDK version: 8.7.0
• Installation method: CocoaPods
• Firebase Component: Core, CoreDiagnostics, Crashlytics,

The problem

Run a project with FirebaseCrashlytics embedded. Warning will show on launch:

    "'NSDictionary' (0x7ff84b43fa60) [/System/Library/Frameworks/CoreFoundation.framework]"
)}'. This will be disallowed in the future.
2021-09-09 09:45:03.052203+0200 ******[7997:216371] [general] *** -[NSKeyedUnarchiver validateAllowedClass:forKey:] allowed unarchiving safe plist type ''NSString' (0x7ff84b469a00) [/System/Library/Frameworks/Foundation.framework]' for key 'NS.keys', even though it was not explicitly included in the client allowed classes set: '{(
    "'NSDictionary' (0x7ff84b43fa60) [/System/Library/Frameworks/CoreFoundation.framework]"
)}'. This will be disallowed in the future.
2021-09-09 09:45:03.052291+0200 ******[7997:216371] [general] *** -[NSKeyedUnarchiver validateAllowedClass:forKey:] allowed unarchiving safe plist type ''NSString' (0x7ff84b469a00) [/System/Library/Frameworks/Foundation.framework]' for key 'NS.keys', even though it was not explicitly included in the client allowed classes set: '{(
    "'NSDictionary' (0x7ff84b43fa60) [/System/Library/Frameworks/CoreFoundation.framework]"
)}'. This will be disallowed in the future.
2021-09-09 09:45:03.052426+0200 ******[7997:216371] [general] *** -[NSKeyedUnarchiver validateAllowedClass:forKey:] allowed unarchiving safe plist type ''NSString' (0x7ff84b469a00) [/System/Library/Frameworks/Foundation.framework]' for key 'NS.objects', even though it was not explicitly included in the client allowed classes set: '{(
    "'NSDictionary' (0x7ff84b43fa60) [/System/Library/Frameworks/CoreFoundation.framework]"
)}'. This will be disallowed in the future.
2021-09-09 09:45:03.052539+0200 ******[7997:216371] [general] *** -[NSKeyedUnarchiver validateAllowedClass:forKey:] allowed unarchiving safe plist type ''NSString' (0x7ff84b469a00) [/System/Library/Frameworks/Foundation.framework]' for key 'NS.keys', even though it was not explicitly included in the client allowed classes set: '{(
    "'NSDictionary' (0x7ff84b43fa60) [/System/Library/Frameworks/CoreFoundation.framework]"
)}'. This will be disallowed in the future.
2021-09-09 09:45:03.052658+0200 ******[7997:216371] [general] *** -[NSKeyedUnarchiver validateAllowedClass:forKey:] allowed unarchiving safe plist type ''NSString' (0x7ff84b469a00) [/System/Library/Frameworks/Foundation.framework]' for key 'NS.keys', even though it was not explicitly included in the client allowed classes set: '{(
    "'NSDictionary' (0x7ff84b43fa60) [/System/Library/Frameworks/CoreFoundation.framework]"
)}'. This will be disallowed in the future.

[mplorentz]

This is still happening with Xcode 13 RC.

[ncooke3]

Hi there, sorry for the trouble. I wasn't able to reproduce Xcode 13 (both beta 5 and RC) in a project using Crashlytics. A few follow-up questions to help debug the issue:

• Is there anymore context in the logs as to where this warning is originating from?

• Could you share the Podfile.lock?

• Alternatively, if you're able to create a mini project that reproduces the issue, please share as it will be very helpful

[mplorentz]

@ncooke3 thanks for your quick reply! I don't see any other helpful information in the logs, but I was able to reproduce in a basic Xcode project. When I build & run this project using Xcode 13 RC I get the warnings described above. Let me know it there's any other information I can provide!
NSKeyedUnarchiverWarnings.zip

[cwagdev]

I'm also seeing this in a project that includes Firebase.

[natalia-osa]

I am also receiving this warning since I upgraded to Xcode 13.0 (13A233) (& I never saw it before). The class which is causing the problem is NSKeyedUnarchiver, which in my project is visible only in Firebase-related dependencies:

Atm Firebase is installed via cocoapods:
pod 'Firebase/Core', "~> 6.33.0"

and in the Podfile.lock I can confirm to have (meaningful version of the modules from the screenshot)

• Firebase/Core (6.33.0)
• FirebaseCoreDiagnostics (1.7.0)
• FirebaseInstallations (1.7.0)
• GoogleDataTransport (7.4.0)
• GoogleUtilities/Environment (6.7.2)

Essentially, it's this warning duplicated 3 times in Xcode console:

[general] *** -[NSKeyedUnarchiver validateAllowedClass:forKey:] 
allowed unarchiving safe plist type ''NSString' (0x10c45f7f0) [/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/Foundation.framework]'
for key 'NS.keys', even though it was not explicitly included in the client allowed classes set: '{(
    "'NSDictionary' (0x10ed8ea30) [/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CoreFoundation.framework]",
    "'NSDate' (0x10ed8e828) [/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CoreFoundation.framework]"
)}'. This will be disallowed in the future.

---

The issue is only reproducible in Xcode 13.
PS. Clearing derived data does not help.

---

Here is the meaningful part of the Podfile.lock (I manually removed other dependencies):

PODS:
  - Firebase/Core (6.33.0):
    - Firebase/CoreOnly
    - FirebaseAnalytics (= 6.8.3)
  - Firebase/CoreOnly (6.33.0):
    - FirebaseCore (= 6.10.3)
  - FirebaseAnalytics (6.8.3):
    - FirebaseCore (~> 6.10)
    - FirebaseInstallations (~> 1.6)
    - GoogleAppMeasurement (= 6.8.3)
    - GoogleUtilities/AppDelegateSwizzler (~> 6.7)
    - GoogleUtilities/MethodSwizzler (~> 6.7)
    - GoogleUtilities/Network (~> 6.7)
    - "GoogleUtilities/NSData+zlib (~> 6.7)"
    - nanopb (~> 1.30906.0)
  - FirebaseCore (6.10.3):
    - FirebaseCoreDiagnostics (~> 1.6)
    - GoogleUtilities/Environment (~> 6.7)
    - GoogleUtilities/Logger (~> 6.7)
  - FirebaseCoreDiagnostics (1.7.0):
    - GoogleDataTransport (~> 7.4)
    - GoogleUtilities/Environment (~> 6.7)
    - GoogleUtilities/Logger (~> 6.7)
    - nanopb (~> 1.30906.0)
  - FirebaseInstallations (1.7.0):
    - FirebaseCore (~> 6.10)
    - GoogleUtilities/Environment (~> 6.7)
    - GoogleUtilities/UserDefaults (~> 6.7)
    - PromisesObjC (~> 1.2)
  - GoogleAppMeasurement (6.8.3):
    - GoogleUtilities/AppDelegateSwizzler (~> 6.7)
    - GoogleUtilities/MethodSwizzler (~> 6.7)
    - GoogleUtilities/Network (~> 6.7)
    - "GoogleUtilities/NSData+zlib (~> 6.7)"
    - nanopb (~> 1.30906.0)
  - GoogleDataTransport (7.4.0):
    - nanopb (~> 1.30906.0)
  - GoogleUtilities/AppDelegateSwizzler (6.7.2):
    - GoogleUtilities/Environment
    - GoogleUtilities/Logger
    - GoogleUtilities/Network
  - GoogleUtilities/Environment (6.7.2):
    - PromisesObjC (~> 1.2)
  - GoogleUtilities/Logger (6.7.2):
    - GoogleUtilities/Environment
  - GoogleUtilities/MethodSwizzler (6.7.2):
    - GoogleUtilities/Logger
  - GoogleUtilities/Network (6.7.2):
    - GoogleUtilities/Logger
    - "GoogleUtilities/NSData+zlib"
    - GoogleUtilities/Reachability
  - "GoogleUtilities/NSData+zlib (6.7.2)"
  - GoogleUtilities/Reachability (6.7.2):
    - GoogleUtilities/Logger
  - GoogleUtilities/UserDefaults (6.7.2):
    - GoogleUtilities/Logger

DEPENDENCIES:
  - Firebase/Core (~> 6.33.0)

SPEC REPOS:
  trunk:
    - Firebase
    - FirebaseAnalytics
    - FirebaseCore
    - FirebaseCoreDiagnostics
    - FirebaseInstallations
    - GoogleAppMeasurement
    - GoogleDataTransport
    - GoogleUtilities

SPEC CHECKSUMS:
  Firebase: 8db6f2d1b2c5e2984efba4949a145875a8f65fe5
  FirebaseAnalytics: 5dd088bd2e67bb9d13dbf792d1164ceaf3052193
  FirebaseCore: d889d9e12535b7f36ac8bfbf1713a0836a3012cd
  FirebaseCoreDiagnostics: 770ac5958e1372ce67959ae4b4f31d8e127c3ac1
  FirebaseInstallations: 466c7b4d1f58fe16707693091da253726a731ed2
  GoogleAppMeasurement: 966e88df9d19c15715137bb2ddaf52373f111436
  GoogleDataTransport: b7f406340a291370045a270c599e53c6fa6ec20f
  GoogleUtilities: 7f2f5a07f888cdb145101d6042bc4422f57e70b3

COCOAPODS: 1.8.4

[ncooke3]

Hi everyone,

Thanks for all the info, and sorry again for the trouble! After further investigation, I believe this runtime warning has been fixed in a 7.x version of GoogleUtilities (dependency of Firebase). Based on some of the older versions of Firebase mentioned in this thread, it's likely this dependency needs updating in your project.

To fix this warning, I'd recommend upgrading to the latest version of Firebase.

With that, I'm going to close this issue. Please don't hesitate to comment here if the issue persists after updating Firebase.

[bdrelling]

@ncooke3 Thanks for the update. Do you know when this will be properly reflected within the core Firebase project? Right now, it looks like the dependency should be pulled in, but I'm using the latest 8.7.0 version of Firebase and it's only grabbing 7.4.1. The change you linked to is on 7.4.2, if I read the PR correctly. At this point, 7.5.2 is deployed, and Firebase is still not pulling that version in by default.

This is the dependency line in the Package.swift file:

firebase-ios-sdk/Package.swift

Lines 159 to 163 in f243335

	.package(
	name: "GoogleUtilities",
	url: "https://github.com/google/GoogleUtilities.git",
	"7.4.0" ..< "8.0.0"
	),

With all the dependency spaghetti Firebase has, it's hard to understand exactly when we'll get a downstream update from one of the other Google dependencies this Package is dependent on.

I'm aware we can manually add the dependency to our project to get it to update to the version we want, but that seems extremely counter-intuitive and more like a workaround to get this to trigger properly. It also doesn't seem like your expectation given that you ask users to upgrade to the latest version of Firebase (which isn't working, at least for me).

What are your thoughts? Thanks again!

[ncooke3]

Sorry for the trouble @bdrelling!

This does not seem like expected behavior. Just to clarify the issue: you are on Firebase 8.7.0 via Swift Package Manager and are seeing only GoogleUtilities 7.4.1 being pulled into your project, correct?