R8 task fails with missing StringConcatFactory

[dhananjayspeed]

Description

when set minifyEnabled to true in build.gradle file buildTypes {
release {
minifyEnabled true
}
}

and after publishing the library and using the library in react-native project getting ERROR: R8: Missing class java.lang.invoke.StringConcatFactory

Packages

• create-react-native-library
• react-native-builder-bob

Selected options

create-react-native-library

Link to repro

https://anyuseanylibrary

Environment

System:
OS: macOS 14.5
CPU: (8) arm64 Apple M1
Memory: 97.42 MB / 16.00 GB
Shell:
version: "5.9"
path: /bin/zsh
Binaries:
Node:
version: 18.20.3
path: /opt/homebrew/opt/node@18/bin/node
Yarn:
version: 1.22.19
path: /usr/local/bin/yarn
npm:
version: 10.7.0
path: /opt/homebrew/opt/node@18/bin/npm
Watchman:
version: 2024.06.10.00
path: /opt/homebrew/bin/watchman
Managers:
CocoaPods:
version: 1.15.2
path: /usr/local/bin/pod
SDKs:
iOS SDK:
Platforms:
- DriverKit 23.5
- iOS 17.5
- macOS 14.5
- tvOS 17.5
- visionOS 1.2
- watchOS 10.5
Android SDK: Not Found
IDEs:
Android Studio: 2024.1 AI-241.18034.62.2411.12071903
Xcode:
version: 15.4/15F31d
path: /usr/bin/xcodebuild
Languages:
Java:
version: 21.0.3
path: /opt/homebrew/opt/openjdk@21/bin/javac
Ruby:
version: 2.6.10
path: /usr/bin/ruby
npmPackages:
"@react-native-community/cli": Not Found
react:
installed: 18.2.0
wanted: 18.2.0
react-native:
installed: 0.73.9
wanted: 0.73.9
react-native-macos: Not Found
npmGlobalPackages:
"react-native": Not Found
Android:
hermesEnabled: true
newArchEnabled: false
iOS:
hermesEnabled: true
newArchEnabled: false

[satya164]

You'll need to configure proguard to keep any classes you need if you enable it. We don't configure it in the app - which is the same code as regular React Native projects.