Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Hermes AndroidUnicodeUtils ClassNotFoundException

See original GitHub issue

Using 0.60.3 with Hermes enabled crashes with the following exception:

terminating with uncaught exception of type facebook::jni::JniException: java.lang.ClassNotFoundException: Didn't find class "com.facebook.hermes.unicode.AndroidUnicodeUtils"

This only happens in release builds on real devices.

Issue Analytics

State:
Created 4 years ago
Comments:5 (1 by maintainers)

Top GitHub Comments

5reactions

mllrmatcommented, Jul 17, 2019

I have enableProguardInReleaseBuilds enabled. So adding a line to my proguard-rules.pro config did the trick for me.

-keep class com.facebook.hermes.unicode.** { *; }

From what I found out this is caused by some code in the “share” module. I am using https://github.com/react-native-community/react-native-share/ but it seams to happen with the react native build in one as well.

Would be helpful if this proguard rule could be added somewhere. Where is the place this should go hermes/rn/react-native-share?

0reactions

stale[bot]commented, Oct 22, 2019

Closing this issue after a prolonged period of inactivity. If this issue is still present in the latest release, please feel free to create a new issue with up-to-date information.