react-native source map of hermes bundle with firebase crashlytics · invertase/react-native-firebase · Discussion #5390

MaxToyberman
Jun 6, 2021

Hi,
I've been using Crashlytics and source map cli for a long time to find out where is my error located.
recently I have started to use hermes engine and now all errors are on line 1 see example:

Non-fatal Exception: io.invertase.firebase.crashlytics.JavaScriptError: Cannot read property 'slice' of undefined
 at .anonymous(address at index.android.bundle:1:1540468)
 at .anonymous(address at index.android.bundle:1:1543708)
 at .anonymous(address at index.android.bundle:1:1563240)
 at .anonymous(address at index.android.bundle:1:1563134)

any ideas ?

Thank you very much

Answered by MaxToyberman

Jun 8, 2021

i found the solution,

please follow this instructions:

https://reactnative.dev/docs/next/symbolication

View full answer

Replies: 2 comments 5 replies

mikehardy
Jun 6, 2021
Maintainer

Hi there! Resolution of crash traces from the crashlytics console down to actual lines of code in dynamic languages is difficult.
Nothing I offer here is a concrete implementation but you ask for ideas so perhaps this will help.
You must tag your source exactly as built, then maintain the ability to generate source maps (or save the source maps) for each transpilation / compliation step

You may wish to follow here, it is a better place for the question as this is really a Hermes question, not a react-native-firebase one: https://stackoverflow.com/questions/67835466/react-native-source-map-of-hermes-bundle-with-firebase-crashlytics

And this may be interesting: https://docs.bugsnag.com/build-integrations/js/source-maps-react-native/#hermes - note the location of the bundle map