RN 0.59.1 sourcemap error in Android

[xutm]

🐛 Bug Report

RN 0.59.1 sourcemap error in Android.

In Scene.js, add console.log(======rendersss===).

But sourcemap is SaleEvent.js

Environment

react-native: 0.59.1

React Native Environment Info:
System:
OS: macOS High Sierra 10.13.6
CPU: (4) x64 Intel(R) Core(TM) i5-6360U CPU @ 2.00GHz
Memory: 411.95 MB / 8.00 GB
Shell: 5.3 - /bin/zsh
Binaries:
Node: 10.2.0 - ~/.nvm/versions/node/v10.2.0/bin/node
Yarn: 1.10.1 - ~/.nvm/versions/node/v10.2.0/bin/yarn
npm: 6.4.1 - ~/.nvm/versions/node/v10.2.0/bin/npm
SDKs:
iOS SDK:
Platforms: iOS 12.0, macOS 10.14, tvOS 12.0, watchOS 5.0
Android SDK:
API Levels: 25, 26, 27, 28
Build Tools: 26.0.0, 26.0.2, 27.0.3, 28.0.3
IDEs:
Android Studio: 3.1 AI-173.4720617
Xcode: 10.0/10A255 - /usr/bin/xcodebuild
npmGlobalPackages:
react-native-cli: 2.0.1

[cpojer]

Can you provide a repository with a repro? Screenshots won't help us solve this issue. Alternatively, you could also try to send a PR with a fix!

[OsamaSaleem95]

same problem here

[yurykorzun]

The metro bundler is producing a wrong source map on Android in 0.59.1 and 0.59.0. At least it is consistently happening in my React Native project, but works fine on iOS. I tried to disable JS deltas, it doesn't help.

Related issues #23955 #6946

It could be related to JSC upgrade, but because I don't know how source maps are generated and mapped to running javascript on a device, I don't know exactly what is causing it.

Metro is using this package for generating a source map https://www.npmjs.com/package/source-map

[kelset]

Closing as duplicate of #23955