RN61.4 and below with hermes enabled ./gradlew assembleRelease fails on Linux.

[Sixzero]

React Native version:
RN61.4 and below.

Steps To Reproduce

1. Hermes enabled. I have many packages in a project.
2. react-native run-android runs just fine.
3. Buidling in release fails: Ex. react-native run-android --variant release

What happens:
Execution failed for task ':app:bundleReleaseJsAndAssets'. Process 'command '../../node_modules/hermes-engine/linux64-bin/hermes'' finished with non-zero exit value 2

More about the error:
Error: Command failed: ./gradlew app:installRelease -PreactNativeDevServerPort=8081

/home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:1: error: Invalid UTF-8 continuation byte �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:1: error: unrecognized Unicode character \ufffd �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:2: error: Invalid UTF-8 continuation byte �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:2: error: unrecognized Unicode character \ufffd �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:4: error: Invalid UTF-8 lead byte 0xfffffffb �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:4: error: unrecognized Unicode character \ufffd �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:5: error: Invalid UTF-8 continuation byte �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:5: error: unrecognized Unicode character \ufffd �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:6: error: unrecognized Unicode character \u6 �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:7: error: unrecognized Unicode character \u0000 �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:8: error: unrecognized Unicode character \u0000 �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:10: error: unrecognized character '#' �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:11: error: unrecognized Unicode character \u0000 �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:12: error: unrecognized Unicode character \u0000 �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:13: error: Invalid UTF-8 lead byte 0xffffff88 �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:13: error: unrecognized Unicode character \ufffd �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:14: error: Invalid UTF-8 continuation byte �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:14: error: unrecognized Unicode character \ufffd �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:15: error: unrecognized Unicode character \u3 �� ��� /home/sixzero/repo/complexapp/android/app/build/generated/assets/react/release/index.android.bundle:1:16: error: unrecognized Unicode character \u0000 �� ��� <unknown>:0: error: too many errors emitted

My guess:
index.android.bundle is not a text file.
The line causing the error in react.gradle 156. line:
commandLine(getHermesCommand(), "-emit-binary", "-out", hbcTempFile, jsBundleFile, *hermesFlags)
What I don't understand is, how can the index.android.bundle file contain unrecognizable unicode characters?

Describe what you expected to happen:
The build finishes without errors.

[Sixzero]

Solved, it was my fault. Used indexed ram bundle...

[usmansbk]

You should close this then.

[Mhmetengineer]

@Sixzero how did u solve?

[apperside]

Hello, I am experiencing the same issue, I just enabled hermes, the app runs fine with react-native run-android, but when I build for release, I get this error (the errors you see in the top half repeats a lot more, I just wanted to focus on the final part with the error details)