Invalid UTF-8 continuation byte for index.android.bundle #3272

[voortexx]

Bug Description

I have a weird problem. We update our react-native from 0.71.7 to O.72.3.
And an issue appeared only for Android.

We use fastlane to generate and upload our files to Sentry, but since this update the index.android.bundle.map is no longer created. I saw that instead we have index.android.bundle.packager.map and we should merge it with another file.

So I look at the documentation and add the script like that

def create_sentry_release(app_name:, flavor_type:)
  # Create sourcemaps folder at project root
  sh("cd ../.. && mkdir -p sourcemaps")
  # Copy the sourcemaps in the new folder
  flavor = flavor_type  == 'Store' ? app_name : "#{app_name}#{flavor_type}"
  asset_bundle_directory_name = flavor_type  == 'Store' ? "createBundle#{app_name.capitalize}ReleaseJsAndAssets"
                               : "createBundle#{app_name.capitalize}#{flavor_type.capitalize}ReleaseJsAndAssets"
  sh('npx react-native bundle --platform android --dev false --entry-file index.js --reset-cache --bundle-output index.android.bundle --sourcemap-output index.android.bundle.packager.map --minify false')
  sh("cp ../app/build/generated/assets/#{asset_bundle_directory_name}/index.android.bundle ../../sourcemaps")
  sh("../../node_modules/react-native/sdks/hermesc/osx-bin/hermesc -O -emit-binary -output-source-map -out=index.android.bundle.hbc ../../sourcemaps/index.android.bundle")
  sh("rm -f ../../sourcemaps/index.android.bundle")
  sh("mv ../../sourcemaps/index.android.bundle.hbc ../../sourcemaps/index.android.bundle")
  sh("cp ../app/build/intermediates/sourcemaps/react/#{flavor}Release/index.android.bundle.packager.map ../../sourcemaps")
  sourcemap_path="../sourcemaps"

But the hermes script that should generate the index.android.bundle.hbc file failed with this error

In fact when I run file -I ../sourcemaps/index.android.bundle it output application/octet-stream; charset=binary

• I have run gradle clean and confirmed this bug does not occur with JSC

Hermes version: Embedded in react native
React Native version (if any): 0.72.3
OS version (if any): Ventura & Linux CircleCI
Platform (most likely one of arm64-v8a, armeabi-v7a, x86, x86_64):

[neildhar]

We don't maintain React Native's bundling code, so we can't provide much input on how the build artefacts may have changed in recent versions.

Transferring the issue to RN.

[github-actions]

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ℹ️	We could not detect a reproducible example in your issue report. Please provide either: If your bug is UI related: a Snack If your bug is build/update related: use our Reproducer Template. A reproducer needs to be in a GitHub repository under your username.

[jayjacksonworks]

@voortexx was there a solution here? - facing the same issue and have a very similar RN config

[voortexx]

Yeah @jayjacksonworks it was my fault. I had changed the path for uploading source maps, but they were still generated in the same place as before.
I just have this code now

def create_sentry_release(app_name:, flavor_type:)
  # Get the app version
  package = load_json(json_path: "../package.json")
  # Create sourcemaps folder at project root
  sh("cd ../.. && mkdir -p sourcemaps")
  # Copy the sourcemaps in the new folder
  flavor = flavor_type  == 'Store' ? app_name : "#{app_name}#{flavor_type}"
  asset_bundle_directory_name = flavor_type  == 'Store' ? "createBundle#{app_name.capitalize}ReleaseJsAndAssets"
                               : "createBundle#{app_name.capitalize}#{flavor_type.capitalize}ReleaseJsAndAssets"
  sh("cp ../app/build/generated/assets/#{asset_bundle_directory_name}/index.android.bundle ../../sourcemaps")
  sh("cp ../app/build/generated/sourcemaps/react/#{flavor}Release/index.android.bundle.map ../../sourcemaps")