"Something went wrong while linking. Error: Cannot read property 'match' of undefined"

Is this a bug report?

Yes

Have you read the Contributing Guidelines?

Yes

Environment

$ react-native info:

Environment:
  OS: macOS Sierra 10.12.6
  Node: 8.9.1
  Yarn: 1.3.2
  npm: 5.5.1
  Watchman: 4.9.0
  Xcode: Xcode 9.1 Build version 9B55
  Android Studio: Not Found

Packages: (wanted => installed)
  react: 16.0.0 => 16.0.0
  react-native: 0.50.3 => 0.50.3

Target Platform: iOS 11.1

Steps to Reproduce

1. yarn add react-native-blur@3.2.2
2. react-native link react-native-blur

Expected Behavior

Package linked without error

Actual Behavior

$ react-native link react-native-blur

rnpm-install info Linking react-native-blur android dependency 
rnpm-install info Android module react-native-blur has been successfully linked 
rnpm-install info Linking react-native-blur ios dependency 
rnpm-install ERR! Something went wrong while linking. Error: Cannot read property 'match' of undefined 
Please file an issue here: https://github.com/facebook/react-native/issues 

Cannot read property 'match' of undefined

Note that I haven’t seen a similar error, before RN 0.50 or react-native-blur <= 3.2.0

Issue also reported at https://github.com/react-native-community/react-native-blur/issues/246

[LiuShuoyu]

If your iOS project is using CocoaPods (contains Podfile) and linked library has podspec file, then react-native link will link library using Podfile. To support non-trivial Podfiles add # Add new pods below this line comment to places where you expect pods to be added.

[code-by]

@LiuShuoyu in my project there is Pod file with following content:

target 'MyApp'
pod 'Fabric'
pod 'Crashlytics'

and after these lines I need add # Add new pods below this line?