[iOS] Crashed: com.facebook.react.ShadowQueue

We’re experiencing random crashes throughout our app (no specific screen or user flow, 19% of them happening in the background) since upgrading to RN 0.60.x

React Native version:

System:
    OS: macOS 10.14.4
    CPU: (8) x64 Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
    Memory: 2.65 GB / 16.00 GB
    Shell: 5.3 - /bin/zsh
  Binaries:
    Node: 10.12.0 - /usr/local/bin/node
    Yarn: 1.10.1 - /usr/local/bin/yarn
    npm: 6.11.2 - /usr/local/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  SDKs:
    iOS SDK:
      Platforms: iOS 12.2, macOS 10.14, tvOS 12.2, watchOS 5.2
    Android SDK:
      API Levels: 23, 25, 26, 28
      Build Tools: 23.0.1, 25.0.0, 25.0.2, 25.0.3, 26.0.1, 26.0.2, 26.0.3, 27.0.3, 28.0.3
  IDEs:
    Xcode: 10.2.1/10E1001 - /usr/bin/xcodebuild
  npmPackages:
    react: 16.8.6 => 16.8.6
    react-native: ^0.60.5 => 0.60.5
  npmGlobalPackages:
    create-react-native-app: 1.0.0
    react-native-cli: 2.0.1
    react-native-git-upgrade: 0.2.7

Steps To Reproduce

So… this is a hard one as we’re unable ourselves to reproduce this issue. We released a new version of our iOS app, where we upgraded react-native to 0.60.5. We got a huge spike in crashes (+250%) since this release, with a crashlog that’s not really helping us.

Crashed: com.facebook.react.ShadowQueue
0  CoreFoundation                 0x18619ab44 <redacted> + 148
1  ???                            0x0 (Missing)
2  Delta                          0x1046e1a28 -[RCTNativeAnimatedModule startAnimatingNode:nodeTag:config:endCallback:] + 90 (RCTNativeAnimatedModule.m:90)
3  CoreFoundation                 0x1862cc724 <redacted> + 148
4  ???                            0x0 (Missing)
5  ???                            0x6a2c118186196000 (Missing)
6  ???                            0x0 (Missing)
7  Delta                          0x1046a5770 facebook::react::invokeInner(RCTBridge*, RCTModuleData*, unsigned int, folly::dynamic const&) + 108 (RCTNativeModule.mm:108)
8  Delta                          0x1046a54d4 invocation function for block in facebook::react::RCTNativeModule::invoke(unsigned int, folly::dynamic&&, int) + 365 (Optional.h:365)
9  libdispatch.dylib              0x185f6bbb0 <redacted> + 32
10 ???                            0x6f355b0185f6d000 (Missing)
11 ???                            0x0 (Missing)
12 ???                            0x4135950185f74000 (Missing)
13 ???                            0x0 (Missing)
14 ???                            0x0 (Missing)
15 ???                            0x5a357b8185fd8c00 (Missing)

Am I correct to assume that this crash has something to do with an <Animated/> tag? If so, I saw there were some fixes included in RN 0.60.x related to Animated, any idea where to start looking for this problem?

[zhaiduo]

The bug is still there?

[toshe]

Here’s my stacktrace and RN info:

System:
    OS: macOS Mojave 10.14.6
    CPU: (8) x64 Intel(R) Core(TM) i5-8279U CPU @ 2.40GHz
    Memory: 434.84 MB / 16.00 GB
    Shell: 3.2.57 - /bin/bash
  Binaries:
    Node: 13.13.0 - /usr/local/bin/node
    Yarn: 1.22.4 - /usr/local/bin/yarn
    npm: 6.14.4 - /usr/local/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  Managers:
    CocoaPods: 1.9.1 - /usr/local/bin/pod
  SDKs:
    iOS SDK:
      Platforms: iOS 13.0, DriverKit 19.0, macOS 10.15, tvOS 13.0, watchOS 6.0
    Android SDK:
      API Levels: 23, 28, 29
      Build Tools: 23.0.3, 28.0.3, 29.0.0
      System Images: android-23 | Google APIs Intel x86 Atom, android-27 | Google APIs Intel x86 Atom, android-28 | Google APIs Intel x86 Atom, android-29 | Google APIs Intel x86 Atom
      Android NDK: Not Found
  IDEs:
    Android Studio: 3.4 AI-183.6156.11.34.5522156
    Xcode: 11.0/11A420a - /usr/bin/xcodebuild
  Languages:
    Java: 1.8.0_212 - /usr/bin/javac
    Python: 2.7.16 - /usr/bin/python
  npmPackages:
    @react-native-community/cli: Not Found
    react: 16.11.0 => 16.11.0 
    react-native: 0.62.2 => 0.62.2 
  npmGlobalPackages:
    *react-native*: Not Found

Firebase crash log:

Crashed: com.facebook.react.ShadowQueue
0  libsystem_malloc.dylib         0x7fff51400029 nanov2_allocate_from_block.cold.1 + 32
1  libsystem_malloc.dylib         0x7fff513ed14c nanov2_allocate_from_block + 528
2  libsystem_malloc.dylib         0x7fff513ec34d nanov2_allocate + 130
3  libsystem_malloc.dylib         0x7fff513ec27a nanov2_malloc + 56
4  libsystem_malloc.dylib         0x7fff513f030d malloc_zone_malloc + 104
5  libsystem_malloc.dylib         0x7fff513f0abc malloc + 21
6  Foundation                     0x7fff25665a2a allocateStorageWithSentinel + 38
7  Foundation                     0x7fff25603eaf -[NSConcreteHashTable initWithOptions:capacity:] + 179
8  Foundation                     0x7fff25602f61 +[NSHashTable weakObjectsHashTable] + 39
9  <app>                        0x10b4d1b2e -[RCTUIManager uiBlockWithLayoutUpdateForRootView:] + 516 (RCTUIManager.m:516)
10 <app>                        0x10b4d6604 -[RCTUIManager _layoutAndMount] + 1145 (RCTUIManager.m:1145)
11 <app>                        0x10b492fcd __32-[RCTCxxBridge batchDidComplete]_block_invoke + 1379 (RCTCxxBridge.mm:1379)
12 libdispatch.dylib              0x7fff511fb888 _dispatch_call_block_and_release + 12
13 libdispatch.dylib              0x7fff511fc7f9 _dispatch_client_callout + 8
14 libdispatch.dylib              0x7fff51202566 _dispatch_lane_serial_drain + 707
15 libdispatch.dylib              0x7fff51202f9c _dispatch_lane_invoke + 388
16 libdispatch.dylib              0x7fff5120d06c _dispatch_workloop_worker_thread + 626
17 libsystem_pthread.dylib        0x7fff5141c611 _pthread_wqthread + 421
18 libsystem_pthread.dylib        0x7fff5141c3fd start_wqthread + 13