Reanimated 2.1.0 makes the Hermes Debugger in Flipper crash

[andreialecu]

Description

Been troubleshooting an issue with the app crashing when using the Hermes Debugger:

facebook/hermes#491

I noticed in the device logs a warning about libjsc.so not being found, but since I was using Hermes that error didn't make much sense. (a similar error report is here: facebook/react-native#25537)

I noticed 2.1.0 added support for JSC. So I reverted to 2.0.1 to see if the warning above was produced by reanimated.

Reverting to 2.0.1 got rid of the libjsc.so warning, and the Hermes Debugger no longer crashes.

Expected behavior

Hermes Debugger should not crash.

Actual behavior & steps to reproduce

Hermes Debugger crashes with RN 0.64 and reanimated 2.1.0 on an Android real device.

A native stack trace can be found in: facebook/hermes#491

Package versions

• React Native: 0.64
• React Native Reanimated: 2.1.0

Affected platforms

• Android
• iOS
• Web

[github-actions]

Issue validator

The issue is valid!

[mutablestudio]

I'm also dealing with this now and can't get a local AS build to run without crashing. I setup a pure RN sample project and added reanimated2 plus hermes 0.7.2, plus some of the standard node_modules. I added rea2 imports to the home screen and rendered an Animated.View. The app will run without any crash (just loading one home screen) on same device that crashes with my own RN app w rea2 (Pixel 3, Anrdoid 11). Sample app is using RN 64.0.

So not sure that this is a rea2 issue, but def seems to be Hermes related. Rolling back now to older Hermes versions to see if that helps.

[andreialecu]

I mentioned in the initial post that Reanimated 2.0.1 works. This is related to #1842

[piaskowyk]

I know the reason and I work on a solution.

[rplankenhorn]

@piaskowyk Any update on this?

[oleksandr-dziuban]

Also waiting this fix, thanks a lot...

[piaskowyk]

Hey, It will be fixed by: #2047 We want to release a new version tomorrow.

[MaxToyberman]

Hi !
@piaskowyk flipper works, but changing to debug in developer menu crashes the app.

[jameskennethrobinson]

@MaxToyberman this is also happening for me. did you find a workaround for opening up the debug menu?

[terrysahaidak]

Hey, @MaxToyberman, could you please open a new issue with all the details? I will help us to track and fix it.

[andreialecu]

FWIW the debug menu (Chrome debugging) will not work because of React Native's Turbo Modules. It's not Reanimated's fault.

See:
react-native-community/discussions-and-proposals#40 (comment)

Only flipper can be used when Turbo Modules are enabled, which Reanimated 2 uses.

[Echelpoel]

@andreialecu looks like Chrome debugging support has been added in 2.3.0-alpha.2?