ReactNative App Crashes when Deployed to TestFlight

Question

Created Apr ’22

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I am working on a ReactNative app that is working on the simulator and works when debugging on a plugged in device (iPhone 7).

When I download the app from TestFlight on the same device, the app crashes immediately upon opening the app. The app is built using ReactNative 0.67.2 and the app has Hermes disabled.

I've looked into other questions but the answers don't resolve the issue we are facing.

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note:  EXC_CORPSE_NOTIFY
Triggered by Thread:  0

Last Exception Backtrace:
0   CoreFoundation                	0x182379c9c __exceptionPreprocess + 216 (NSException.m:200)
1   libobjc.A.dylib               	0x19952d758 objc_exception_throw + 56 (objc-exception.mm:565)
2   SoberConnectionApp            	0x104f49cd4 RCTFatal + 668 (RCTAssert.m:146)
3   SoberConnectionApp            	0x104f748e8 __28-[RCTCxxBridge handleError:]_block_invoke + 700 (RCTCxxBridge.mm:1226)
4   libdispatch.dylib             	0x182045194 _dispatch_call_block_and_release + 24 (init.c:1517)
5   libdispatch.dylib             	0x182046198 _dispatch_client_callout + 16 (object.m:560)
6   libdispatch.dylib             	0x181ff25d0 _dispatch_main_queue_callback_4CF$VARIANT$mp + 940 (inline_internal.h:2601)
7   CoreFoundation                	0x1823357e8 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12 (CFRunLoop.c:1795)
8   CoreFoundation                	0x1822f30e8 __CFRunLoopRun + 2528 (CFRunLoop.c:3144)
9   CoreFoundation                	0x182305d7c CFRunLoopRunSpecific + 572 (CFRunLoop.c:3268)
10  GraphicsServices              	0x19c57a9a0 GSEventRunModal + 160 (GSEvent.c:2200)
11  UIKitCore                     	0x184b3805c -[UIApplication _run] + 1080 (UIApplication.m:3493)
12  UIKitCore                     	0x1848cdce0 UIApplicationMain + 2028 (UIApplication.m:5046)
13  SoberConnectionApp            	0x104e7e1ac main + 88 (main.m:7)
14  dyld                          	0x10541c190 start + 444 (dyldMain.cpp:876)

crashlog.crash

Answered by CodyTMinus in 711616022

So after digging into the console I found this error:

No bundle URL present.

Make sure you're running a packager server or have included a .jsbundle file in your application bundle.

This lead me to this Stack Overflow post and the 7th response is what helped me find and now it's working when deployed via TestFlight. Lastly, I needed to find another script to include the assets in the build phases - bundle resources. I can't include the link because the forum does not allow it, but the updated package.json script is below

react-native bundle --minify --entry-file index.js --platform ios --dev false --bundle-output ./ios/main.jsbundle --assets-dest ./ios

Hopefully this post can help others with the same issue!

Boost

Answer 1

DTS Engineer OP

Apple

Apr ’22

Your app crashed due to an unhandled language exception. Looking at frames 3 through 2 in the Last Exception Backtrace you posted, it seems likely that this was caused by an error within your third-party runtime.

As to what that error was, my general advice is that you escalation such issues via the support channel for your runtime. In this case, however, there’s a step you should take before that, namely, looking at the system log on the device. It seems likely that this error will have logged something useful there.

To view the device’s system log:

Connect it to your Mac via USB.
Run the Console app on the Mac.
Select your iOS device on the left.

This generates a lot of traffic so you’ll need to do some filtering. One option is to find the process ID (pid) of your app and filter on that. When your app dies, it’s likely that its last message (or thereabouts) will include the info you need.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

1

Answer 2

CodyTMinus OP