CODEWITHSUNDEEP
node.jsreactjsreact-nativeexpo
TorbenJ
TorbenJ

Reputation: 4582

Expo crashes after start

I got an issue when starting my React Native project using expo start.
The browser opens up and shows me the following page:
Expo Browser

After about a second the page goes dark completely and the following error appears in the console (with EXPO_DEBUG=true set): 

Expo DevTools is running at http://localhost:19002
Opening DevTools in the browser... (press shift-d to disable)
error Invalid regular expression: /(.*\\__fixtures__\\.*|node_modules[\\\]react[\\\]dist[\\\].*|website\\node_modules\\.*|heapCapture\\bundle\.js|.*\\__tests__\\.*)$/: Unterminated character class. Run CLI with --verbose flag for more details.

Metro Bundler process exited with code 1
Error: Metro Bundler process exited with code 1
    at ChildProcess.<anonymous> (C:\@expo\[email protected]\src\Project.ts:1804:16)
    at Object.onceWrapper (events.js:300:26)
    at ChildProcess.emit (events.js:210:5)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:272:12)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

I'm running Windows 10 1903 x64, NodeJs v12.11.0 and the following dependencies: 

"dependencies": {
  "expo": "^35.0.0",
  "react": "16.8.3",
  "react-dom": "16.8.3",
  "react-native": "https://github.com/expo/react-native/archive/sdk-35.0.0.tar.gz",
  "react-native-web": "^0.11.7"
},
"devDependencies": {
  "@types/react": "^16.8.23",
  "@types/react-native": "^0.57.65",
  "babel-preset-expo": "^7.0.0",
  "typescript": "^3.4.5"
}

Any idea what to do now?

Upvotes: 3

Views: 4808

Answers (4)

Zanimo
Zanimo

Reputation: 53

I had this issue too after updating NodeJS to 12.13. I downgraded to 10.17 and it's working back again.

Upvotes: 0

Bilal Khursheed
Bilal Khursheed

Reputation: 836

just need to change some hashes on your project: Go to : \node_modules\metro-config\src\defaults\blacklist.js

var sharedBlacklist = [
  /node_modules[/\\]react[/\\]dist[/\\].*/,
  /website\/node_modules\/.*/,
  /heapCapture\/bundle\.js/,
  /.*\/__tests__\/.*/
];

to this :

var sharedBlacklist = [
  /node_modules[\/\\]react[\/\\]dist[\/\\].*/,
  /website\/node_modules\/.*/,
  /heapCapture\/bundle\.js/,
  /.*\/__tests__\/.*/
];

Upvotes: 12

PTra
PTra

Reputation: 11

Uninstall latest Node version

And reinstall Node Version 10.16.3

It should work.

Upvotes: 0

Terry S
Terry S

Reputation: 58

I was running Windows 10 with Node LTS version v10.16.3 and it was working fine. I changed to Node Current Version v12.11.0 and I got the same error. Reverted back to Node LTS version v10.16.3 and it is all working fine again.

I also upgraded the Expo cli to from 3.1.2. to 3.2.3. Just in case I reverted to the earlier version again (it is only 12 days old) npm -g i [email protected].

You can try that as well if changing your Node version doesn't work.

After the above changes, everything is working smoothly again.

Upvotes: 3

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