[Packager][Babel] Packager hangs indefinitely at 99%, running Examples. Caused by Babel?

[qbig]

Log

12-30 08:31:59.519 32354-32376/com.facebook.react.uiapp W/unknown:React: Could not parse DebugServerException from: {"message":"TransformError: /Users/qiaoliang89/Downloads/test/react-native/node_modules/react-transform-hmr/node_modules/react-proxy/modules/createClassProxy.js: [BABEL] /Users/qiaoliang89/Downloads/test/react-native/node_modules/react-transform-hmr/node_modules/react-proxy/modules/createClassProxy.js: Unknown option: /Users/qiaoliang89/Downloads/test/react-native/node_modules/react-transform-hmr/node_modules/react-proxy/.babelrc.stage","type":"TransformError","errors":[{}]}

12-30 08:31:59.519 32354-32376/com.facebook.react.uiapp W/unknown:React: Could not parse DebugServerException from: {"message":"TransformError: /Users/qiaoliang89/Downloads/test/react-native/node_modules/react-transform-hmr/node_modules/react-proxy/modules/createClassProxy.js: [BABEL] /Users/qiaoliang89/Downloads/test/react-native/node_modules/react-transform-hmr/node_modules/react-proxy/modules/createClassProxy.js: Unknown option: /Users/qiaoliang89/Downloads/test/react-native/node_modules/react-transform-hmr/node_modules/react-proxy/.babelrc.stage","type":"TransformError","errors":[{}]}
                                                                         org.json.JSONException: No value for filename
                                                                             at org.json.JSONObject.get(JSONObject.java:355)
                                                                             at org.json.JSONObject.getString(JSONObject.java:515)
                                                                             at com.facebook.react.devsupport.DebugServerException.parse(DebugServerException.java:56)
                                                                             at com.facebook.react.devsupport.DevServerHelper$1.onResponse(DevServerHelper.java:187)
                                                                             at com.squareup.okhttp.Call$AsyncCall.execute(Call.java:168)
                                                                             at com.squareup.okhttp.internal.NamedRunnable.run(NamedRunnable.java:33)
                                                                             at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
                                                                             at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
                                                                             at java.lang.Thread.run(Thread.java:841)
12-30 08:31:59.519 32354-32376/com.facebook.react.uiapp E/unknown:React: Unable to download JS bundle
                                                                         java.io.IOException: Unexpected response code: 500
                                                                             at com.facebook.react.devsupport.DevServerHelper$1.onResponse(DevServerHelper.java:191)
                                                                             at com.squareup.okhttp.Call$AsyncCall.execute(Call.java:168)
                                                                             at com.squareup.okhttp.internal.NamedRunnable.run(NamedRunnable.java:33)
                                                                             at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
                                                                             at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
                                                                             at java.lang.Thread.run(Thread.java:841)

related to #4674 and #4062 ?

[facebook-github-bot]

Hey qbig, thanks for reporting this issue!

React Native, as you've probably heard, is getting really popular and truth is we're getting a bit overwhelmed by the activity surrounding it. There are just too many issues for us to manage properly.

• If you don't know how to do something or something is not working as you expect but not sure it's a bug, please ask on StackOverflow with the tag react-native or for more real time interactions, ask on Discord in the #react-native channel.
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• We welcome clear issues and PRs that are ready for in-depth discussion. Please provide screenshots where appropriate and always mention the version of React Native you're using. Thank you for your contributions!

[sophiebits]

Yes, this seems like a bug, maybe in 52b2484. Trying to fix it.

[qbig]

This is from master

[sophiebits]

Should be fixed by bec9110.

[christopherdro]

👍 Works.