Expo go crashing on ios simulator (expo React Native template app)

I have problem with running expo, newly created app (empty Hello World!). It works perfectly with android studio emulator, but when I try to open it on the IOS simulator Expo go app is being installed, but app is not starting. It looks like crash without any errors in console (expo app splash screen is visible for a moment, then app disappears).

My Xcode app is updated

My dependencies:

"expo": "~47.0.8",
"expo-status-bar": "~1.4.2",
"react": "18.1.0",
"react-native": "0.70.5"

I tried:

  • granting different permissions for Xcode app on my macOS
  • removing node_modules and package-lock.json and installing dependencies again (npm install)
  • removing .expo directory
  • using different ios simulators
  • uninstalling expo app on simulators and resetting them
  • I also followed expo documentation and I have Xcode command line tools installed (iOS Simulator - Expo Documentation)

Any suggestions?

Hi @im-emby,

It’s hard to suggest anything without knowing any errors. Only thing I can think is to enable rosetta if your macOS is based on an M1 machine. Also, can you run the command npx expo-env-info and share the output here?

@amanhimself

I have the same issue. Upgrading from SDK 45 to 47 and only iOS crashes on simulator. I also did create a new fresh app and it also crashes, but does not crash using react-native-cli.

I have an old MacBook Pro 2011 using Monterey 12.6.1 and just Expo Go won’t start. Its version is 2.26.4.101

Running fresh expo app crashes on any iOS simulator

It seems that RNSkDrawViewImpl.mm is related to react-native-skia

  expo-env-info 1.0.5 environment info:
    System:
      OS: macOS 12.6.1
      Shell: 5.8.1 - /bin/zsh
    Binaries:
      Node: 16.15.0 - ~/.nvm/versions/node/v16.15.0/bin/node
      Yarn: 1.22.18 - ~/.nvm/versions/node/v16.15.0/bin/yarn
      npm: 9.1.3 - ~/.nvm/versions/node/v16.15.0/bin/npm
    Managers:
      CocoaPods: 1.11.3 - /Users/philippe/.rbenv/shims/pod
    SDKs:
      iOS SDK:
        Platforms: DriverKit 21.4, iOS 16.0, macOS 12.3, tvOS 16.0, watchOS 9.0
    IDEs:
      Xcode: 14.0.1/14A400 - /usr/bin/xcodebuild
    npmPackages:
      expo: ~47.0.8 => 47.0.8 
      react: 18.1.0 => 18.1.0 
      react-native: 0.70.5 => 0.70.5 
    npmGlobalPackages:
      eas-cli: 3.0.0
      expo-cli: 5.4.8
    Expo Workflow: managed
-------------------------------------
Translated Report (Full Report Below)
-------------------------------------

Incident Identifier: 3399EEBC-9D96-4412-98BA-A0474EA0B9A1
CrashReporter Key:   FD943CC5-D53F-BC18-DD17-2990EDA435AF
Hardware Model:      MacBookPro8,3
Process:             Expo Go [22658]
Path:                /Users/USER/Library/Developer/CoreSimulator/Devices/BA9D1C76-F618-4837-AD61-9AC8DC21CB3E/data/Containers/Bundle/Application/C29F09CA-21FD-4205-AB14-1E355ED27004/Exponent-2.26.4.tar.app/Expo Go
Identifier:          host.exp.Exponent
Version:             2.26.4 (2.26.4.101)
Code Type:           X86-64 (Native)
Role:                Foreground
Parent Process:      launchd_sim [15229]
Coalition:           com.apple.CoreSimulator.SimDevice.BA9D1C76-F618-4837-AD61-9AC8DC21CB3E [18185]
Responsible Process: SimulatorTrampoline [1803]

Date/Time:           2022-12-08 11:33:26.6227 -0500
Launch Time:         2022-12-08 11:33:25.5728 -0500
OS Version:          macOS 12.6.1 (21G215)
Release Type:        User
Report Version:      104

Exception Type:  EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes: 0x0000000000000001, 0x0000000000000000
Exception Note:  EXC_CORPSE_NOTIFY
Termination Reason: SIGNAL 4 Illegal instruction: 4
Terminating Process: exc handler [22658]

Triggered by Thread:  0

Thread 0 Crashed::  Dispatch queue: com.apple.main-thread
0   CoreFoundation                	    0x7fff204a3752 CFRetain.cold.1 + 14
1   CoreFoundation                	    0x7fff20391eec CFRetain + 86
2   Expo Go                       	       0x10ef5faa0 _GLOBAL__sub_I_ABI46_0_0RNSkDrawViewImpl.mm + 54
3   dyld_sim                      	       0x117ab5c95 ImageLoaderMachO::doModInitFunctions(ImageLoader::LinkContext const&) + 513
4   dyld_sim                      	       0x117ab608a ImageLoaderMachO::doInitialization(ImageLoader::LinkContext const&) + 40
5   dyld_sim                      	       0x117ab0bb7 ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, char const*, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) + 455
6   dyld_sim                      	       0x117aaeec7 ImageLoader::processInitializers(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&, ImageLoader::UninitedUpwards&) + 191
7   dyld_sim                      	       0x117aaef68 ImageLoader::runInitializers(ImageLoader::LinkContext const&, ImageLoader::InitializerTimingList&) + 82
8   dyld_sim                      	       0x117aa226b dyld::initializeMainExecutable() + 199
9   dyld_sim                      	       0x117aa6f56 dyld::_main(macho_header const*, unsigned long, int, char const**, char const**, char const**, unsigned long*) + 4789
10  dyld_sim                      	       0x117aa11c2 start_sim + 122
11  dyld                          	       0x11ba3cb78 dyld4::prepareSim(dyld4::RuntimeState&, char const*) + 1265
12  dyld                          	       0x11ba3b70e dyld4::prepare(dyld4::APIs&, dyld3::MachOAnalyzer const*) + 244
13  dyld                          	       0x11ba3b4e4 start + 388

Thread 1:
0   libsystem_pthread.dylib       	    0x7fff60346f48 start_wqthread + 0

Thread 2:
0   libsystem_pthread.dylib       	    0x7fff60346f48 start_wqthread + 0

Thread 3:
0   libsystem_pthread.dylib       	    0x7fff60346f48 start_wqthread + 0


Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x00007fff206738d3  rbx: 0x0000000000000000  rcx: 0xff80008800000001  rdx: 0x0000000000000000
  rdi: 0x0000000000000000  rsi: 0x00007fff6067b5f1  rbp: 0x00007ff7b17c6c10  rsp: 0x00007ff7b17c6c08
   r8: 0x00000000000001b0   r9: 0x0000000000000030  r10: 0x0000000000000039  r11: 0x00007fff20391e96
  r12: 0x00007ff7b17c6c40  r13: 0x000000000000001c  r14: 0x00007fe6fe8120a8  r15: 0x0000000000000000
  rip: 0x00007fff204a3752  rfl: 0x0000000000010246  cr2: 0x00007fff204a3744
  
Logical CPU:     4
Error Code:      0x00000000 
Trap Number:     6


Binary Images:
    0x7fff20311000 -     0x7fff206aefff com.apple.CoreFoundation (6.9) <9bfc8556-af16-311f-874e-374fa485fe2e> /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 14.5.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
       0x10e72f000 -        0x112422fff host.exp.Exponent (2.26.4) <3478c841-8ff3-3610-a99c-5a76f36cb64b> /Users/USER/Library/Developer/CoreSimulator/Devices/BA9D1C76-F618-4837-AD61-9AC8DC21CB3E/data/Containers/Bundle/Application/C29F09CA-21FD-4205-AB14-1E355ED27004/Exponent-2.26.4.tar.app/Expo Go
       0x117aa0000 -        0x117af9fff dyld_sim (*) <2a92fc99-72a9-38ed-8ddd-af4c25080124> /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 14.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/dyld_sim
       0x11ba36000 -        0x11baa1fff dyld (*) <7b87a986-a153-33c4-8470-d56410b7f9d5> /usr/lib/dyld
    0x7fff60345000 -     0x7fff60350fff libsystem_pthread.dylib (*) <b5454e27-e8c7-3fdb-b77f-714f1e82e70b> /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 14.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/libsystem_pthread.dylib

EOF

-----------
Full Report
-----------

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I see that Exponent-2.24.3 is the last Expo Go working on iOS simulator but unfortunately it won’t run an application made with SDK 47

where are you seeing this? the latest version is 2.26.4. it will install automatically when you launch an sdk 47 project through the cli (or uninstall expo go from the simulator to ensure it does). alternatively, you can download it from Get Expo Tools — Expo

direct link

I know this! What I’m saying is since version 2.25.X (and of course since the last one 2.26.4) Expo Go crashes every time on any of my iOS simulators. And I did post my crash report of it since 4 days. I wanted to help by finding from which version it started to crash

are you using react-native-skia? have you tried narrowing down the root cause? does it happen in a new project for you?

more info on how to debug: fyi/manual-debugging.md at main · expo/fyi · GitHub

Have you read my previous post? Everything is said in it. Yes it crashes on a new Expo project, no I’m not using react-native-skia but viewing the crash log I see that it’s related to this and I’m only running a new fresh managed project.

And it’s Expo Go that’s crashing, so I can’t even run my own new app, only clicking on Expo Go on iOS simulator crashes before doing anything else with it. So the crash is really because of Expo Go and not the new app. And it doesn’t crash on a new react-native project (without Expo) or it’s not crashing if using new Expo Go project being ejected (because it doesn’t use Expo Go App to launch it).

Also, some people have the same issue since a couple of days

no, i didn’t read the previous post before, but i did now.

it looks like the crash you are seeing is related to something we attempted to fix upstream in react-native-skia previously with this pr: Create Metal device lazily by Kudo · Pull Request #952 · Shopify/react-native-skia · GitHub

it occurs when hardware acceleration is disabled. it’s not clear to me how your simulator would get in this state, you could try changing this option:

Thank you for this reply. Unfortunately none of these options seem to work. My MAC seems to use integrated Intel HD graphics. It’s sad because it’s working ejected or plain react-native and also, I’m not using react-native-skia but it seems the faulty inside Expo Go… hope there will be another solution.

hopefully we can patch this in skia in the next release. until then, i’d recommend using development builds instead! they are similar to expo go but more flexible: Create development builds - Expo Documentation

You are right, it’s working using development builds. I also wish it’s included in next release. Thanks again!