Repository navigation
After upgrading to React-Native 0.56.0 metro build fails (TypeError: Cannot read property 'ast' of null) #20247
Description
- Review the documentation: https://facebook.github.io/react-native
- Search for existing issues: https://github.com/facebook/react-native/issues
- Use the latest React Native release: https://github.com/facebook/react-native/releases
Environment
Run react-native info in your terminal and paste its contents here.
React Native Environment Info:
System:
OS: macOS High Sierra 10.13.5
CPU: x64 Intel(R) Core(TM) i5-5287U CPU @ 2.90GHz
Memory: 45.86 MB / 8.00 GB
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 8.11.3 - ~/.nvm/versions/node/v8.11.3/bin/node
Yarn: 1.7.0 - /usr/local/bin/yarn
npm: 5.6.0 - ~/.nvm/versions/node/v8.11.3/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
SDKs:
iOS SDK:
Platforms: iOS 11.4, macOS 10.13, tvOS 11.4, watchOS 4.3
Android SDK:
Build Tools: 23.0.1, 25.0.1, 26.0.2, 27.0.3, 28.0.0
API Levels: 23, 25, 26, 27
IDEs:
Android Studio: 3.1 AI-173.4819257
Xcode: 9.4/9F1027a - /usr/bin/xcodebuild
npmPackages:
react: 16.4.1 => 16.4.1
react-native: 0.56.0 => 0.56.0
npmGlobalPackages:
react-native-cli: 2.0.1
Description
After upgrading to react-native version 0.56.0 my metro build fails with the error message TypeError: Cannot read property 'ast' of null.
I also read this issue #19827 but could not fix my issue with the suggestions there.
From the error message it seams the bug is in the metro src.
Detailed error message:
error: bundling failed: TypeError: Cannot read property 'ast' of null
at Object.transform (/Users/david/projects/churchtools-mobile/node_modules/metro/src/reactNativeTransformer.js:167:48)
at Object.<anonymous> (/Users/david/projects/churchtools-mobile/node_modules/metro/src/JSTransformer/worker.js:204:23)
at Generator.next (<anonymous>)
at step (/Users/david/projects/churchtools-mobile/node_modules/metro/src/JSTransformer/worker.js:328:291)
at /Users/david/projects/churchtools-mobile/node_modules/metro/src/JSTransformer/worker.js:328:521
at new Promise (<anonymous>)
at Object.<anonymous> (/Users/david/projects/churchtools-mobile/node_modules/metro/src/JSTransformer/worker.js:328:202)
at Object.transformCode [as transform] (/Users/david/projects/churchtools-mobile/node_modules/metro/src/JSTransformer/worker.js:292:93)
at execMethod (/Users/david/projects/churchtools-mobile/node_modules/jest-worker/build/child.js:90:29)
Activity
ptmt commentedon Aug 13, 2018
Do you have
ignoresection in your.babelrcby any chance? It doesn't work for me well (config gets unresolved, and babel transformation fails), so I removed this section for now. Probably also need to test with newer babel / metro and file an issue.helenaford commentedon Sep 16, 2018
Wish there was a solution for this. Ignore was working for me before I upgraded my babel from beta.47 to 7.0.0. Issue is with React-Native 0.57.0 too.
jkimbo commentedon Sep 23, 2018
This looks like a bug in metro. I found a patch that fixes it: react/metro#255 (comment)
stale commentedon Dec 23, 2018
Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as "For Discussion" or "Good first issue" and I will leave it open. Thank you for your contributions.