iOS fails to build after setup with cocoa pods

OS:

• Windows
• MacOS
• Linux

Platform:

• iOS
• Android

SDK:

• @sentry/react-native
• react-native-sentry

react-native version: 0.59.10 xcode version 10.3

Init Code:

Sentry.init({
  dsn: '[e-mail]/1234'
});

---

I have following issue:

I have installed react-native-sentry using cocoa pods I can run the app locally using the react-native cli, but if I try to build through xcode I the build fails due to:

ld: 294 duplicate symbols for architecture x86_64

Steps to reproduce:

• Install react-native-sentry using pod installation guide and try to run the app through xcode in debug mode

Actual result:

• Build fails with following output:

duplicate symbol _OBJC_IVAR_$_SentryUser._userId in:
    /Users/user/Library/Developer/Xcode/DerivedData/app-gsrsnnhwyiekueaappkouvpynhfx/Build/Products/Debug-iphonesimulator/libRNSentry.a(SentryUser.o)
    /Users/user/Library/Developer/Xcode/DerivedData/app-gsrsnnhwyiekueaappkouvpynhfx/Build/Products/Debug-iphonesimulator/Sentry/libSentry.a(SentryUser.o)
duplicate symbol _OBJC_IVAR_$_SentryUser._extra in:
    /Users/user/Library/Developer/Xcode/DerivedData/app-gsrsnnhwyiekueaappkouvpynhfx/Build/Products/Debug-iphonesimulator/libRNSentry.a(SentryUser.o)
    /Users/user/Library/Developer/Xcode/DerivedData/app-gsrsnnhwyiekueaappkouvpynhfx/Build/Products/Debug-iphonesimulator/Sentry/libSentry.a(SentryUser.o)
ld: 294 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Expected result:

• It should build successfully

[kristerkari]

I had the same problem, but manged to figure out from the error messages that the duplicate symbols are related to some kind of caching that the iPhone simulator does.

so I opened ios/DerivedData/MYPROJECTNAME/Build/Products/Debug-iphonesimulator/ and deleted all files and folders that were related to Sentry. I ran the build again from XCode, and the error went away.

[kristerkari]

to add to my comment:

I was doing an update from React Native 0.59.10 to 0.60.5 and at the same time changed from react-native-sentry to @sentry/react-native.

It seems that it caused some old files to be cached by the iPhone simulator.