Nuxt.js projects fail to compile

Bug report

All Nuxt.js projects fail to compile (probably due to a dependency update?)

Describe the bug

Nuxt.js projects compile with 5 errors from core-js and chokidar. Tested from multiple machines running on different node versions

To Reproduce

1. create a new Nuxt project through create-keystone-app
2. run the default yarn dev server
3. app compiles with errors. see console log below

Console log

i Command: keystone dev
√ Validated project entry file ./index.js
√ Keystone server listening on port 3000
√ Initialised Keystone instance
- Connecting to databasei Preparing project for development
              18:38:54
i Initial build may take a while                                                          18:38:54
\ Connecting to database√ Builder initialized
              18:38:55
\ Connecting to database√ Nuxt files generated
              18:39:08

× Client
  Compiled with some errors in 11.96s

√ Server
  Compiled successfully in 11.10s


 ERROR  Failed to compile with 5 errors                                   friendly-errors 18:39:25

These dependencies were not found:                                        friendly-errors 18:39:25
                                                                          friendly-errors 18:39:25
* core-js/modules/es6.regexp.to-string in ./dist/client.js, ./dist/components/nuxt-link.client.js
* core-js/modules/es7.promise.finally in ./dist/client.js                 friendly-errors 18:39:25
* core-js/modules/es7.symbol.async-iterator in ./dist/client.js, ./dist/components/nuxt-link.client.

js
                                                                          friendly-errors 18:39:25
To install them, you can run: npm install --save core-js/modules/es6.regexp.to-string core-js/module

s/es7.promise.finally core-js/modules/es7.symbol.async-iterator
i Waiting for file changes                                                                18:39:25
- Connecting to databaseError from chokidar (C:\): Error: EBUSY: resource busy or locked, lstat 'C:\

DumpStack.log.tmp'
Error from chokidar (C:\): Error: EBUSY: resource busy or locked, lstat 'C:\hiberfil.sys'
Error from chokidar (C:\): Error: EBUSY: resource busy or locked, lstat 'C:\pagefile.sys'
Error from chokidar (C:\): Error: EBUSY: resource busy or locked, lstat 'C:\swapfile.sys'
× Connecting to database
Error: connect ECONNREFUSED 127.0.0.1:27017
    at resolveAllKeys (C:\%projectfolder%\node_modules\@keystonejs\utils\dist\utils.cjs.dev.js:48:19)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async Keystone.connect (C:\%projectfolder%\node_modules\@keystonejs\keystone\lib\Keystone\index.js:459:5)
    at async executeDefaultServer (C:\%projectfolder%\node_modules\@keystonejs\keystone\bin\utils.js:114:3) {
  errors: {
    MongooseAdapter: MongooseServerSelectionError: connect ECONNREFUSED 127.0.0.1:27017
        at NativeConnection.Connection.openUri (C:\%projectfolder%\node_modules\mongoose\lib\connection.js:823:32)
        at Mongoose.connect (C:\%projectfolder%\node_modules\mongoose\lib\index.js:333:15)
        at MongooseAdapter._connect (C:\%projectfolder%\node_modules\@keystonejs\adapter-mongoose\lib\adapter-mongoose.js:59:25)
        at MongooseAdapter.connect (C:\%projectfolder%\node_modules\@keystonejs\keystone\lib\adapters\index.js:22:16)
        at C:\%projectfolder%\node_modules\@keystonejs\keystone\lib\Keystone\index.js:459:63
        at C:\%projectfolder%\node_modules\@keystonejs\utils\dist\utils.cjs.dev.js:22:10
        at Array.reduce (<anonymous>)
        at mapKeys (C:\%projectfolder%\node_modules\@keystonejs\utils\dist\utils.cjs.dev.js:21:52)
        at Keystone.connect (C:\%projectfolder%\node_modules\@keystonejs\keystone\lib\Keystone\index.js:459:26)
        at executeDefaultServer (C:\%projectfolder%\node_modules\@keystonejs\keystone\bin\utils.js:114:18)
        at runMicrotasks (<anonymous>)
        at processTicksAndRejections (internal/process/task_queues.js:97:5) {
      reason: [TopologyDescription]
    }
  }
}
error Command failed with exit code 1.

System information

• Windows 10 x64
• Node.js 12.16.3, 10.16.3
• yarn 1.22.4, 1.19.1

Additional context

I have had successful builds in the past weeks with this. I’ve lost a yarn.lock file on a previously working project and after downloading dependencies again, this error was thrown. While troubleshooting I figured I’d try running the default example and the same behavior occurred, so I’d guess something changed in dependencies.

Following the friendly-errors prompt to install the missing core-js packages results in a 405 error.

[matheuschimelli]

Just run npm i -S core-js@2.5.7. It solved my problem. Check this issue: https://github.com/keystonejs/keystone/issues/1843#issue-512929679

[dendihandian]

if you’re using yarn, it should be solved by running yarn add core-js@2.5.7