FIAM Crashing App

[RiverboatGambler]

Description

Please bear with me as I'm not an "expert" bug poster. This issue started happening as soon as I upgraded from Firebase version 10.17.0 to 10.24.0. It also manifests in version 10.25.0

The issue is that my app crashes as soon as it's launched when it tries to display a modal FIAM message. I don't know if the modality has anything to do with things. From some Google searches, it looks like a similar issue may have existed before related to "bundles".

Stack trace from XCode 15.2 (from @implementation FIRIAMDefaultDisplayImpl)

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[2]'
*** First throw call stack:
(
	0   CoreFoundation                      0x00007ff80049b761 __exceptionPreprocess + 242
	1   libobjc.A.dylib                     0x00007ff800063904 objc_exception_throw + 48
	2   CoreFoundation                      0x00007ff80038244d -[__NSPlaceholderArray initWithObjects:count:] + 482
	3   CoreFoundation                      0x00007ff800486947 +[NSArray arrayWithObjects:count:] + 40
	4   ****My App*****                    0x000000010e4bf1e4 __49+[FIRIAMDefaultDisplayImpl getViewResourceBundle]_block_invoke + 1540
	5   libdispatch.dylib                   0x00007ff800157d3a _dispatch_client_callout + 8
	6   libdispatch.dylib                   0x00007ff8001590f3 _dispatch_once_callout + 20
	7    ****My App*****                     0x000000010e4beb13 +[FIRIAMDefaultDisplayImpl getViewResourceBundle] + 947
	8    ****My App*****                     0x000000010e4c15a6 __82+[FIRIAMDefaultDisplayImpl displayModalViewWithMessageDefinition:displayDelegate:]_block_invoke + 566
	9   libclang_rt.asan_iossim_dynamic.dyl 0x0000000114e1109c __wrap_dispatch_async_block_invoke + 204
	10  libdispatch.dylib                   0x00007ff800156a90 _dispatch_call_block_and_release + 12
	11  libdispatch.dylib                   0x00007ff800157d3a _dispatch_client_callout + 8
	12  libdispatch.dylib                   0x00007ff800166ac0 _dispatch_main_queue_drain + 1420
	13  libdispatch.dylib                   0x00007ff800166526 _dispatch_main_queue_callback_4CF + 31
	14  CoreFoundation                      0x00007ff8003f7dc4 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
	15  CoreFoundation                      0x00007ff8003f26ff __CFRunLoopRun + 2463
	16  CoreFoundation                      0x00007ff8003f197d CFRunLoopRunSpecific + 557
	17  GraphicsServices                    0x00007ff80fe9d08f GSEventRunModal + 137
	18  UIKitCore                           0x00007ff805bbb53d -[UIApplication _run] + 972
	19  UIKitCore                           0x00007ff805bbffab UIApplicationMain + 123
	20   ****My App*****                    0x000000010c07ebbf main + 63
	21  dyld                                0x0000000113d733e0 start_sim + 10
	22  ???                                 0x00000001174e9386 0x0 + 4685992838
)

Screenshot of code from XCode:

Reproducing the issue

I can reproduce it in my app by simply triggering an in-app message.

Firebase SDK Version

10.24 or earlier

Xcode Version

15.2

Installation Method

Swift Package Manager

Firebase Product(s)

In-App Messaging

Targeted Platforms

iOS

Relevant Log Output

No response

If using Swift Package Manager, the project's Package.resolved

Expand Package.resolved snippet

Replace this line with the contents of your Package.resolved.

If using CocoaPods, the project's Podfile.lock

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[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[RiverboatGambler]

Thank you. I'll provide any information you may need. I'm sure my "approach" to getting to that FIAM trigger and how I manage views at start up are probably part of the problem.

[rizafran]

Thanks for reporting this, @RiverboatGambler. I was able to reproduce the same issue. With this, I'll be raising this to our engineers and see what we can do here.

[ncooke3]

Thanks for the report, @RiverboatGambler. This could be related to some recent changes in that class.

[RiverboatGambler]

I won't lie - I'm relieved because when it comes to stuff like this because I'm not great at triage. Thanks for all you do!

[rromanchuk]

Can confirm massive uptick, i use foreground ATT-Preroll and "newer version available" nudges. I just stopped the long running campaigns, just to see if I can prevent that code path from running via server side (temporarily killing the IAM campaign).

@rizafran @ncooke3 if you want a permalink to full trace lmk and i can email/dm, but i'm guessing you don't need if you were able to repro

unhandled *** -[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[2]

//__49+[FIRIAMDefaultDisplayImpl getViewResourceBundle]_block_invoke (FIRIAMDefaultDisplayImpl.m:70)
#endif  // SWIFT_PACKAGE
    NSBundle *containingBundle;
    NSURL *bundleURL;
    // The containing bundle is different whether FIAM is statically or dynamically linked.
    for (containingBundle in @[
           // Statically linked.
           [NSBundle mainBundle],
           // Dynamically linked.
           [NSBundle bundleForClass:myClass],
           // Embedded static framework (zip distribution).

[shayanaghajan]

Is there any update related to this ticket?

[hamed-ice]

The same issue when we updated to 10.25.0 it seems when the message gonna populate we have this crash

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[2]'
*** First throw call stack:
(
	0   CoreFoundation                      0x00000001804ae138 __exceptionPreprocess + 172
	1   libobjc.A.dylib                     0x0000000180087db4 objc_exception_throw + 56
	2   CoreFoundation                      0x0000000180398f70 -[__NSPlaceholderArray initWithObjects:count:] + 552
	3   CoreFoundation                      0x0000000180499148 +[NSArray arrayWithObjects:count:] + 36
	4    *** MY APP ***                     0x0000000103681494 __49+[FIRIAMDefaultDisplayImpl getViewResourceBundle]_block_invoke + 320
	5   libdispatch.dylib                   0x00000001147a173c _dispatch_client_callout + 16
	6   libdispatch.dylib                   0x00000001147a3210 _dispatch_once_callout + 84
	7    *** My APP ***                     0x000000010368132c +[FIRIAMDefaultDisplayImpl getViewResourceBundle] + 156
	8    *** My APP ***                      0x0000000103682100 __83+[FIRIAMDefaultDisplayImpl displayBannerViewWithMessageDefinition:displayDelegate:]_block_invoke + 40
	9   libdispatch.dylib                   0x000000011479fec4 _dispatch_call_block_and_release + 24
	10  libdispatch.dylib                   0x00000001147a173c _dispatch_client_callout + 16
	11  libdispatch.dylib                   0x00000001147b13f8 _dispatch_main_queue_drain + 1228
	12  libdispatch.dylib                   0x00000001147b0f1c _dispatch_main_queue_callback_4CF + 40
	13  CoreFoundation                      0x000000018040e9a0 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
	14  CoreFoundation                      0x00000001804090b8 __CFRunLoopRun + 1936
	15  CoreFoundation                      0x0000000180408514 CFRunLoopRunSpecific + 572
	16  GraphicsServices                    0x000000018ef06ae4 GSEventRunModal + 160
	17  UIKitCore                           0x00000001853e8040 -[UIApplication _run] + 868
	18  UIKitCore                           0x00000001853ebcc8 UIApplicationMain + 124
	19   *** My APP ***                      0x00000001023ad7cc main + 180
	20  dyld                                0x00000001126b1544 start_sim + 20
	21  ???                                 0x000000011282e0e0 0x0 + 4605534432
	22  ???                                 0xd652800000000000 0x0 + 15443546809695207424
)

[ncooke3]

Hi everyone, sincere apologies for the trouble. I'm working on addressing this in https://github.com/firebase/firebase-ios-sdk/issues/12882. We'll have a fix going out in the Firebase 10.27.0 release. Until then, I recommend downgrading to 10.24.0.

[67millwood]

rolled back to 10.24. issue went away for me. thanks for posting..was losing my mind.