`react-native run-ios` build failure on XCode 12.5 beta

[bsk26]

Ask your Question

I'm getting a build error while attempting to test our react-native app in XCode 12.5 beta. Apologies if this is inappropriate but it appears to be a real issue.

I'm running "react-native": "0.62.2" (however, it doesn't appear this is fixed in the lastest stable release)

It looks like this exact issue was fixed in facebook/react-native#28362, which is part of 0.63+. This PR indicates it was fixed for Clang 10 but as far as I can tell the clang/llvm version hasn't changed between 12.4 and 12.5. The app builds correctly when using 12.4 command line tools but not 12.5 beta command line tools (configured via XCode preferences).

The build error (with compiler):

** BUILD FAILED **

The following build commands failed:
        CompileC .../Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/React-Core.build/Objects-normal/x86_64/RCTCxxBridge.o /Users/bkraft/Projects/zabo-mobile/node_modules/react-native/React/CxxBridge/RCTCxxBridge.mm normal x86_64 objective-c++ com.apple.compilers.llvm.clang.1_0.compiler
(1 failure)

The stack trace is as follows,

/node_modules/react-native/React/CxxBridge/RCTCxxBridge.mm:331:34: error: cannot initialize a parameter of type 'NSArray<id<RCTBridgeModule>> *' with an rvalue of type 'NSArray<Class> *'
  (void)[self _initializeModules:RCTGetModuleClasses() withDispatchGroup:prepareBridge lazilyDiscovered:NO];
                                 ^~~~~~~~~~~~~~~~~~~~~
/node_modules/react-native/React/CxxBridge/RCTCxxBridge.mm:771:82: note: passing argument to parameter 'modules' here
- (NSArray<RCTModuleData *> *)_initializeModules:(NSArray<id<RCTBridgeModule>> *)modules
                                                                                 ^
/node_modules/react-native/React/CxxBridge/RCTCxxBridge.mm:776:79: error: cannot initialize a parameter of type 'NSArray<Class> *' with an lvalue of type 'NSArray<id<RCTBridgeModule>> *__strong'
  NSArray<RCTModuleData *> *moduleDataById = [self _registerModulesForClasses:modules lazilyDiscovered:lazilyDiscovered];
                                                                              ^~~~~~~
/node_modules/react-native/React/CxxBridge/RCTCxxBridge.mm:618:76: note: passing argument to parameter 'moduleClasses' here
- (NSArray<RCTModuleData *> *)_registerModulesForClasses:(NSArray<Class> *)moduleClasses
                                                                           ^
/node_modules/react-native/React/CxxBridge/RCTCxxBridge.mm:827:69: error: cannot initialize a parameter of type 'NSArray<id<RCTBridgeModule>> *' with an lvalue of type 'NSArray<Class> *__strong'
    NSArray<RCTModuleData *> *newModules = [self _initializeModules:modules withDispatchGroup:NULL lazilyDiscovered:YES];
                                                                    ^~~~~~~
/Users/bkraft/Projects/zabo-mobile/node_modules/react-native/React/CxxBridge/RCTCxxBridge.mm:771:82: note: passing argument to parameter 'modules' here
- (NSArray<RCTModuleData *> *)_initializeModules:(NSArray<id<RCTBridgeModule>> *)modules

[uijunii]

Try this

1. Edit Podfile in ios directory like this ↓
   ===========================
   use_flipper!

   ↓
   

use_flipper!({ 'Flipper-Folly' => '2.3.0' })

2. npm install in project folder
3. pod install in ios folder

[afixoftrix]

@bsk26 , did you ever find a solution to this?

[bsk26]

@bsk26 , did you ever find a solution to this?

I ended up removing flipper since we were hardly using it.

[best777]

@bsk26 ,did you have other way ? I remove flipper , but not working.

[Atoyebs]

Hi all, is there any solution to this? I'm experiencing the exact same problem

[bsk26]

@Atoyebs @best777 We weren't actively using Flipper so our solution was to remove it from the app. I'm not sure if the issue has been fixed however the other underlying issues we were facing were resolved in the later versions of ios 14.5 beta.

[gcrozariol]

This might be the weirdest thing ever, but it worked for me.

I figured out that creating a project within a folder that contains a space i.e. ~/Documents/My Projects was the problem. When creating a project in a directory that has no spaces i.e. ~/Documents/Projects, you can run the project on both iOS and Android with no errors at all.

[joelvarty]

Seeing the same issue on 14.5... any ideas on how to fix this?

[nelsonchen5]

+1

[Dassine]

+1

[smooney211993]

+1

[YanouHD]

Hello,

This is now an issue with Xcode 12.5 final, released today... Can't build my app anymore, any workaround ?

[honia19]

+1 XCode Final version 12.5 react-native 0.61.5

[aparedes]

This is a Flipper-Folly issue.
Commenting useFlipper out from Podfile should work.

facebook/folly#1527
facebook/flipper#2215

another workaround facebook/flipper#2215 (comment)