`resolve/lib/core` is deprecated; please use `is-core-module` directly

Expo Development Tools
1

I’m geeting this error when runing expo start

The app is still running locally, so maybe it’s just a warning

resolve/lib/core is deprecated; please use is-core-module directly`

2

Sounds like a warning, but can you please run expo diagnostics and post the output here?

3 
  Expo CLI 3.28.0 environment info:
    System:
      OS: macOS 10.15.7
      Shell: 5.7.1 - /bin/zsh
    Binaries:
      Node: 12.16.1 - ~/.nvm/versions/node/v12.16.1/bin/node
      Yarn: 1.21.1 - /usr/local/bin/yarn
      npm: 6.13.4 - ~/.nvm/versions/node/v12.16.1/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    Managers:
      CocoaPods: 1.5.3 - /usr/local/bin/pod
    SDKs:
      iOS SDK:
        Platforms: iOS 13.1, DriverKit 19.0, macOS 10.15, tvOS 13.0, watchOS 6.0
    IDEs:
      Android Studio: 3.1 AI-173.4819257
      Xcode: 11.1/11A1027 - /usr/bin/xcodebuild
    npmPackages:
      expo: ~39.0.2 => 39.0.3
      react: 16.13.1 => 16.13.1
      react-dom: 16.13.1 => 16.13.1
      react-native: ~0.63.3 => 0.63.3
      react-native-web: ~0.13.12 => 0.13.18
    npmGlobalPackages:
      expo-cli: 3.28.0
    Expo Workflow: bare
4

OK, nothing obviously wrong there.

Can you post the whole error? Unfortunately, googling the error message does not turn up anything useful.

5

Screen Shot 2020-10-28 at 11.45.34 AM
Screen Shot 2020-10-28 at 11.45.34 AM1774×714 68 KB

6

This is from expo publish

Building optimized bundles and generating sourcemaps...
Starting Metro Bundler.
Building iOS bundle
`resolve/lib/core` is deprecated; please use `is-core-module` directly

transform[stderr]: `resolve/lib/core` is deprecated; please use `is-core-module` directly
transform[stderr]: `resolve/lib/core` is deprecated; please use `is-core-module` directly
transform[stderr]: `resolve/lib/core` is deprecated; please use `is-core-module` directly
transform[stderr]: `resolve/lib/core` is deprecated; please use `is-core-module` directly
transform[stderr]: `resolve/lib/core` is deprecated; please use `is-core-module` directly
transform[stderr]: `resolve/lib/core` is deprecated; please use `is-core-module` directly
7

I’m having trouble figuring out what Google search results are relevant.

What dev dependencies + versions do you have?

Have you customised your babel or metro configs?

Any chance you can remove your node_modules and reinstall the deps?

8

I have the same problem. After I press enter with expo start command the terminal present the error: resolve/lib/core is deprecated; please use is-core-module directly.

The app is running normally but I do not know exactly what should be update to remove this error/warning.