GAD_GADNetwork_arm64_7_67_0 crash

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[REQUIRED] Step 1: Describe your environment

  • Xcode version: 12.3
  • Firebase SDK version: – Firebase/AdMob (6.34.0). – Google-Mobile-Ads-SDK (7.67.0)
  • Installation method: CocoaPods
  • Firebase Component: Core, AdMob, Crashlytics

[REQUIRED] Step 2: Describe the problem

many crash in GAD_GADNetwork_arm64_7_67_0

Steps to reproduce:

can not reproduce, most call stack like this:

Crashed: com.apple.main-thread
0 libobjc.A.dylib 0x19fe700f8 objc_msgSend + 24
1 CoreFoundation 0x18ade6388 -[__NSDictionaryM objectForKeyedSubscript:] + 184
2 CoreTelephony 0x18b463024 -[CTTelephonyNetworkInfo currentRadioAccessTechnology] + 188
3 HelloTalk_Binary 0x101d954a8 GAD_GADNetwork_arm64_7_67_0 + 4322022568
4 HelloTalk_Binary 0x101d952f0 GAD_GADNetwork_arm64_7_67_0 + 4322022128
5 Foundation 0x18c254850 NSBLOCKOPERATION_IS_CALLING_OUT_TO_A_BLOCK + 24
6 Foundation 0x18c141740 -[NSBlockOperation main] + 104
7 Foundation 0x18c256ca4 NSOPERATION_IS_INVOKING_MAIN + 24
8 Foundation 0x18c1413c8 -[NSOperation start] + 808
9 Foundation 0x18c25774c NSOPERATIONQUEUE_IS_STARTING_AN_OPERATION + 24
10 Foundation 0x18c2571d4 __NSOQSchedule_f + 184
11 libdispatch.dylib 0x18ab07fb8 _dispatch_block_async_invoke2 + 148
12 libdispatch.dylib 0x18aaf9db0 _dispatch_client_callout + 20
13 libdispatch.dylib 0x18ab077ac _dispatch_main_queue_callback_4CF + 836
14 CoreFoundation 0x18ae8111c CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 16
15 CoreFoundation 0x18ae7b120 __CFRunLoopRun + 2508
16 CoreFoundation 0x18ae7a21c CFRunLoopRunSpecific + 600
17 GraphicsServices 0x1a297e784 GSEventRunModal + 164
18 UIKitCore 0x18d8b8fe0 -[UIApplication _run] + 1072
19 UIKitCore 0x18d8be854 UIApplicationMain + 168
20 HelloTalk_Binary 0x1025f0440 main + 18 (main.m:18)
21 libdyld.dylib 0x18ab3a6b0 start + 4

1 possible answer(s) on “GAD_GADNetwork_arm64_7_67_0 crash

  1. Hello,

    Thank you for the updates– my best guess is that these crashes are occurring due to race conditions inside of CTTelephonyNetworkInfo. I’m going to disable some of the accesses being made by the SDK, which should make the SDK behave like pre-7.67.0 releases. These changes are scheduled for a release in the week of Feb 8.