Issue with the race effect under React Native

[AlexisChevalier]

Hi there,

I tried this morning to follow the advice given in this issue (https://github.com/redux-saga/redux-saga/issues/1039) in order to monitor my saga. Unfortunately I was unable to proceed because of two problems:

• This issue (https://github.com/redux-saga/redux-saga-devtools/issues/13) prevented me from using the DockableSagaView component
• I have a race effect in my saga and his presence caused an exception on this line (https://github.com/redux-saga/redux-saga-devtools/blob/master/src/store/reducers.js#L70). The exception was "Cannot read property 'push' of undefined", I will put the stacktrace below but the packager makes it difficult to use.

uncaught at rootSaga 
 at rootSaga 
 at rootSaga 
 TypeError: Cannot read property 'push' of undefined
    at effectsById (http://192.168.1.100.xip.io:8081/index.ios.bundle?platform=ios&dev=true&minify=false:117487:25)
    at combination (http://192.168.1.100.xip.io:8081/index.ios.bundle?platform=ios&dev=true&minify=false:60471:29)
    at dispatch (http://192.168.1.100.xip.io:8081/index.ios.bundle?platform=ios&dev=true&minify=false:60107:22)
    at Object.effectTriggered (http://192.168.1.100.xip.io:8081/index.ios.bundle?platform=ios&dev=true&minify=false:117320:5)
    at runEffect (http://192.168.1.100.xip.io:8081/index.ios.bundle?platform=ios&dev=true&minify=false:61776:32)
    at http://192.168.1.100.xip.io:8081/index.ios.bundle?platform=ios&dev=true&minify=false:62047:7
    at Array.forEach (native)
    at runRaceEffect (http://192.168.1.100.xip.io:8081/index.ios.bundle?platform=ios&dev=true&minify=false:62043:10)
    at runEffect (http://192.168.1.100.xip.io:8081/index.ios.bundle?platform=ios&dev=true&minify=false:61812:549)
    at next (http://192.168.1.100.xip.io:8081/index.ios.bundle?platform=ios&dev=true&minify=false:61727:9)

I am using React Native 0.45.1, redux-saga 0.15.4, redux 3.7.1 and redux-saga-devtools 0.1.1

Thanks again for your work :)