Requires Babel "^7.0.0-0", but was loaded with "6.26.3". #6913

dmurphy5 · 2018-08-29T15:02:30Z

🐛 Bug Report

I get the following message when trying to run tests. None of the solutions in the documentation or other issues work.

    Requires Babel "^7.0.0-0", but was loaded with "6.26.3". If you are sure you have a compatible version of @babel/core, it is likely that something in your build process is loading the wrong version. Inspect the stack trace of this error to look for the first entry that doesn't mention "@babel/core" or "babel-core" to see what is calling Babel.

      at throwVersionError (node_modules/@babel/plugin-proposal-class-properties/node_modules/@babel/helper-plugin-utils/lib/index.js:65:11)
      at Object.assertVersion (node_modules/@babel/plugin-proposal-class-properties/node_modules/@babel/helper-plugin-utils/lib/index.js:13:11)
      at _default (node_modules/@babel/plugin-proposal-class-properties/lib/index.js:81:7)
      at node_modules/@babel/plugin-proposal-class-properties/node_modules/@babel/helper-plugin-utils/lib/index.js:19:12
          at Array.map (<anonymous>)

To Reproduce

Relevant package.json dependencies/config

{
   "devDependencies": {
        "@babel/core": "^7.0.0",
        "@babel/plugin-proposal-class-properties": "^7.0.0",
        "@babel/plugin-proposal-decorators": "^7.0.0",
        "@babel/plugin-proposal-object-rest-spread": "^7.0.0",
        "@babel/plugin-syntax-dynamic-import": "^7.0.0",
        "@babel/preset-env": "^7.0.0",
        "@babel/preset-react": "^7.0.0",
        "@babel/register": "^7.0.0",
        "babel-core": "^7.0.0-bridge.0",
        "babel-jest": "^23.4.2",
        "babel-loader": "^8.0.0",
        "jest": "^23.5.0",
        "jest-environment-jsdom": "^23.4.0",
        "jest-junit": "^3.6.0",
        "jest-transform-graphql": "^2.1.0",
        "regenerator-runtime": "^0.12.1"
    },
   "jest": {
        "coveragePathIgnorePatterns": [
            "node_modules",
            "/*.graphql"
        ],
        "transform": {
            "\\.(gql|graphql)$": "jest-transform-graphql",
            "^.+\\.js$": "babel-jest"
        },
        "setupFiles": [
            "<rootDir>/src/jestSetup.js"
        ],
        "snapshotSerializers": [
            "enzyme-to-json/serializer"
        ],
        "testResultsProcessor": "jest-junit"
    }
}

.babelrc

{
    "presets": ["@babel/preset-react"],
    "plugins": [
        "@babel/plugin-proposal-class-properties",
        "@babel/plugin-proposal-object-rest-spread",
        "@babel/plugin-syntax-dynamic-import",
        ["@babel/plugin-proposal-decorators", { "legacy": true }]
    ],
    "env": {
        "test": {
            "presets": ["@babel/preset-env", "@babel/preset-react"]
        }
    }
}

jestSetup.js

import 'regenerator-runtime';
import Enzyme from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';

Enzyme.configure({ adapter: new Adapter() });

Expected behavior

Jest runs correctly

Link to repl or repo (highly encouraged)

Please provide either a repl.it demo or a minimal repository on GitHub.

Issues without a reproduction link are likely to stall.

Run `npx envinfo --preset jest`

Throws the follwing error

(node:792) UnhandledPromiseRejectionWarning: TypeError: Cannot read property '1' of null

The text was updated successfully, but these errors were encountered:

davidcalhoun · 2018-08-29T22:13:36Z

Strange. I got the exact same error due to me removing babel-core when I updated to Babel 7. I re-added it alongside @babel/core and that fixed it, although I see you're already doing that above:

  "devDependencies": {
    "@babel/core": "^7.0.0",
    "babel-core": "7.0.0-bridge.0"
  }

Are you using package-lock.json? Maybe try deleting it and also remove node_modules, then reinstall? I wonder if there's something lingering from before you upgraded to Babel 7?

jorgegonzalez · 2018-08-30T07:24:30Z

Running yarn why babel-core points to jest-runtime as the culprit:

SimenB · 2018-08-30T07:45:35Z

I think this should work, your config looks correct...

Mind setting up a repo showing the error?

herodrigues · 2018-08-30T16:00:31Z

@jorgegonzalez same here in the project I'm working on

Since I've updated to babel 8 (@babel/core), all tests are breaking.

 FAIL  test/spec/utils.test.js
  ● Test suite failed to run

    Jest encountered an unexpected token

    This usually means that you are trying to import a file which Jest cannot parse, e.g. it's not plain JavaScript.

    By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules".

    Here's what you can do:
     • To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
     • If you need a custom transformation specify a "transform" option in your config.
     • If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.

    You'll find more details and examples of these config options in the docs:
    https://jestjs.io/docs/en/configuration.html

    Details:

    /home/herinson/.../test/jest.setup.js:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import { configure } from 'enzyme';
                                                                                                    ^

    SyntaxError: Unexpected token {

      at ScriptTransformer._transformAndBuildScript (node_modules/jest-runtime/build/script_transformer.js:403:17)

And if I run npm ls babel-core, it shows that jest-runtime depends on [email protected]

└─┬ [email protected]
  └─┬ [email protected]
    ├─┬ [email protected]
    │ └─┬ [email protected] 
    │   └─┬ [email protected]
    │     └── [email protected]  deduped
    └─┬ [email protected]
      └── [email protected]  deduped

matthamil · 2018-08-30T20:49:31Z

I was able to get rid of this error by copying node_modules/babel-core into node_modules/jest-config/node_modules overriding the installed babel-core that jest-config installs as its dependency. If you are hitting this error, can you check node_modules/jest-config/node_modules/babel-core and see what version it installed? Compare this with your node_modules/babel-core directory. If your project's babel-core is at 7.0.0-bridge.0, it should look much different from the one in the node_modules/jest-config/node_modules directory.

I did a simple test a minute ago to see if updating jest-config's dep version fixes the issue, and it looks like it does:

cp -r node_modules/babel-core node_modules/jest-config/node_modules

This will copy your 7.0.0 version into the jest-config's dependencies. Run your tests again. This worked for me locally, but I am curious if this works for anyone else. If it does, then my PR #6926 may be a proper resolution for this?

⚠️ NOTE: Copying your node_modules/babel-core directory into node_modules/jest-config/node_modules is not a permanent solution. As soon as you need to reinstall dependencies from scratch again (e.g. for CI), this won't work.

dmurphy5 · 2018-08-30T21:30:31Z

@matthamil That did it. Thanks!

herodrigues · 2018-08-31T00:36:40Z

@matteofigus that won't work for babel 8 as all babel modules for this version are installed at node_modules/@babel

g-plane · 2018-08-31T04:04:41Z

My personal temporary solution is adding a postinstall npm script: rimraf node_modules/jest-runtime/node_modules/babel-core node_modules/jest-config/node_modules/babel-core

Note: I am using Yarn.

baldurh · 2018-08-31T11:33:14Z

A solution for Yarn is to add a resolutions field to package.json like so:

"resolutions": {
  "babel-core": "7.0.0-bridge.0"
}

And then run yarn to update the dependency resolutions

matthamil · 2018-08-31T14:01:05Z

@herodrigues good point, I updated the PR to reflect the namespaced @babel/core: https://github.com/facebook/jest/pull/6926/files#diff-42f440414578ffb55a0c454ba79a0d5b

jaywcjlove · 2018-09-01T08:32:42Z

This will be a good solution

sudo npm install [email protected] --save-dev

Run your tests again. This worked for me locally

DBosley · 2018-09-06T17:53:43Z

What's the status on this issue? This is preventing me from updating my project to babel 7. A solution that only works for yarn users isn't a solution.

phil-lgr · 2018-09-08T18:45:27Z

@g-plane's solution worked for me..

npm install [email protected] --save-dev

and add a postinstall npm script with rimraf node_modules/jest-runtime/node_modules/babel-core node_modules/jest-config/node_modules/babel-core

tdd · 2018-09-10T15:27:53Z

The rimraf hack is fugly. I'm teaching a React / Redux / Jest class next week and having this postinstall script in my demo app's package.json makes me want to take a shower.

Please, please Jest team, fix this ASAP!

herodrigues · 2018-09-10T16:07:41Z

A new minor version (23.6.0) was just released, but jest still depends on [email protected]

$ npm ls babel-core
└─┬ [email protected]
  └─┬ [email protected]
    └─┬ [email protected]
      └── [email protected]

npm WARN [email protected] requires a peer of babel-core@^6.0.0 || ^7.0.0-0 but 
none is installed. You must install peer dependencies yourself.

tdd · 2018-09-10T16:41:14Z

What's infuriating is all these docs mentioning 7.0.0-0 which is a version that DOES NOT EXIST. It does resolve to 7.0.0.bridge-0, but not in Jest's context due to their local use of 6 in runtime and config.

On Mon, Sep 10, 2018, at 18:09, Herinson Rodrigues wrote: They've just released a new minor version (23.6.0), but jest still depends on ***@***.*** $ npm ls babel-core └─┬ ***@***.*** └─┬ ***@***.*** └─┬ jest- ***@***.*** └── ***@***.*** npm WARN ***@***.*** requires a peer of babel-core@^6.0.0 || ^7.0.0- 0 but none is installed. You must install peer dependencies yourself. > — You are receiving this because you commented. Reply to this email directly, view it on GitHub[1], or mute the thread[2].

-- Christophe Porteneuve [email protected] Links: 1. #6913 (comment) 2. https://github.com/notifications/unsubscribe-auth/AAAOqPcSn3gMoXWyNTYGFECR1-JiG4z5ks5uZo7FgaJpZM4WRvbY

DBosley · 2018-09-10T17:28:57Z

It looks like this is the PR they're working on to implement this:
#6949
Hopefully they can get it done quickly.

See jestjs/jest#6913 (comment)

SimenB · 2018-09-15T15:12:59Z

Again, Jest works perfectly fine with Babel 7. It things are loaded incorrectly it's an issue with configuration.

I've opened up a PR adding an example to Jest's code base using babel 7: #6983

kettanaito · 2018-09-15T19:10:48Z

Thank you, @SimenB. Your example helped me to get Jest up and running.

For others wondering, I needed to explicitly add @babel/plugin-transform-modules-commonjs plugin to my babel.config.js. After that an error on unexpected import vanished.

My babel.config.js:

'use strict'

module.exports = {
  presets: ['@babel/preset-env', '@babel/preset-react', '@babel/preset-flow'],
  plugins: [
    // adding this one solved the issue
    '@babel/plugin-transform-modules-commonjs',
    '@babel/plugin-proposal-export-default-from',
    '@babel/plugin-proposal-export-namespace-from',
    '@babel/plugin-proposal-class-properties',
    '@babel/plugin-proposal-object-rest-spread',
  ],
}

SimenB · 2018-09-15T19:19:40Z

That seems odd, that plugin should be part of the env preset already... Anyways, this issue is about the Requires Babel "^7.0.0-0", but was loaded with "6.26.3" error, not syntax error.

Awesome you got it to work, though!

DBosley · 2018-09-17T15:57:25Z

@SimenB I have already installed the bridge package for Babel 7, that does not fix the error unless I use yarn and I set up a resolves section in my package.json. Running npm ls babel-core outputs exactly what @herodrigues listed above.

herodrigues · 2018-09-17T17:00:27Z

@DBosley yeah, it still depends on [email protected] but that's not the problem.

I didn't have [email protected] installed. After installing it, it should work as expected.
Also, you should have a babel.config.js file with your plugins and presets.

SimenB · 2018-09-17T17:21:55Z

It doesn't matter that babel-core comes from jest-runtime, it will still work, and load the correct version.

Make sure to use babel.config.js if you're still having issues

gpbl · 2018-09-17T21:24:01Z

(I should say it's hard to deal with this issue, I had the joy to fix it three times and still I'm not sure what I've done to make the error to go away 😄)

tyler-johnson · 2018-09-17T22:06:22Z

I will also add that this has been a little more difficult than "just install babel-core@bridge". In my case, I had to delete node_modules and package-lock.json and do a full rebuild to get the dependency tree correct.

SimenB · 2018-09-18T09:50:48Z

Small improvements like the above in the form of e.g. "You may have to delete your lockfile to get the correct dependency tree" is welcome as pull requests!

I would think that a npm dedupe would have fixed it as well, FWIW

tdd · 2018-09-18T10:03:21Z

Are you telling me that on a fresh project, if we install Babel 7 and babel-core@7-bridge, then install Jest, we don't get Babel version conflicts? How is that even possible considering that, for instance, jest-runtime currently has a clear dependency on babel-core@6, and therefore will have it installed locally and prioritized over the higher-up @7-bridge?

So far the only workaround I've seen that works is to manually strip the locally-installed babel-cores@6 in jest-config and jest-runtime, so they pick up the project-level v7…

tdd · 2018-09-18T10:04:19Z

(At any rate, on any existing project, deleting package-lock may not be an option, and we do get the versioning conflict, so… seems to me fixing jest-runtime and jest-config's dependencies (to something like ">= 6" would be the better way)

SimenB · 2018-09-18T11:23:44Z

Are you telling me that on a fresh project, if we install Babel 7 and babel-core@7-bridge, then install Jest, we don't get Babel version conflicts?

Almost, you also need to install babel-jest. Then yes, you will not get conflicts

At any rate, on any existing project, deleting package-lock may not be an option

Yarn dedupes by default, but you could try to run npm dedupe to avoid blowing away the lockfile completely if you're having issues. But make sure to install babel-jest as well

tdd · 2018-09-18T11:50:05Z

I'll have to give it a whirl. On an existing project, the upgrade (as per npx babel-upgrade) was faulty.

On Tue, Sep 18, 2018, at 13:24, Simen Bekkhus wrote: > Are you telling me that on a fresh project, if we install Babel 7 and > ***@***.***, then install Jest, we don't get Babel version > conflicts?> Almost, you also need to install babel-jest. Then yes, you will not get conflicts> — You are receiving this because you commented. Reply to this email directly, view it on GitHub[1], or mute the thread[2].

-- Christophe Porteneuve [email protected] Links: 1. #6913 (comment) 2. https://github.com/notifications/unsubscribe-auth/AAAOqMpdulOqlJE2O4pZudRSePJaT2oNks5ucNfZgaJpZM4WRvbY

panjiesw · 2018-09-18T12:13:43Z

Starting on a fresh project using @babel/*@^7.0.0 [email protected] [email protected] [email protected], can confirm that it works as expected. No runtime version conflict whatsoever.

Experience on upgrading existing project though, involves fighting with remove-readd dependencies and lockfiles.

SimenB · 2018-09-21T17:52:51Z

It doesn't matter that jest internally requires its own version, we require the version you define when transpiling your code (just make sure to have the bridge package at the top level)

herodrigues · 2018-09-21T18:12:29Z

@SimenB better lock this issue. People will keep coming here to complain about it even though they don't check their project configuration.

DBosley · 2018-09-21T20:23:08Z

I was able to get my project working by running npm remove jest babel-jest then reinstalling them with [email protected] already installed. The errors about babel 6.26.3 went away after doing this

SimenB · 2018-09-21T22:12:06Z

@herodrigues good call!

If people have (babel) issues with Babel 7 whilst:

not using create-react-app
using jest@23 or older
uses babel-core@bridge and @babel/core@7
have both jest and babel-jest in package.json

feel free to open a new issue. If you fit any of the requirements above, without fulfilling all of them, also feel free to open up a new issue!

gaearon · 2019-01-17T13:39:08Z

@SimenB FYI, I've seen non-native speakers misunderstand your comment as a call to "do not use create-react-app" :-) To future readers — if you read it that way, please start again and re-read the whole comment.

SimenB · 2019-01-17T15:54:17Z

Sorry! Changed it to "not using create-react-app". Feel free to edit my comment yourself if you think it can be further clarified. Did not mean to imply you shouldn't use CRA 🙂

EDIT: Also moved it to the top so it reads more naturally

SimenB mentioned this issue Aug 30, 2018

babel-jest fails on dynamic babel.config.js due to old "babel-core" dependency #6916

Closed

matthamil mentioned this issue Aug 30, 2018

Update babel-core dependency to v7 for jest-config #6926

Closed

christophehurpeau mentioned this issue Aug 31, 2018

refactor: supports babel 7 avaly/babel-plugin-inline-classnames#3

Merged

jaywcjlove mentioned this issue Sep 1, 2018

Waiting to upgrade jest uiwjs/uiw#64

Closed

gajus mentioned this issue Sep 3, 2018

using babel-helper-transform-fixture-test-runner getting "expect" is undefined babel/babel#8612

Closed

DBosley mentioned this issue Sep 6, 2018

babel-jest plugin & babel 7 incompatibility #5525

Closed

DBosley mentioned this issue Sep 10, 2018

Fix for Babel7 bridge package name in documentation. #6745

Merged

chmanie pushed a commit to JoinColony/colonyDapp that referenced this issue Sep 12, 2018

Force resolution to babel-core v7

25f000f

See jestjs/jest#6913 (comment)

SimenB mentioned this issue Sep 15, 2018

add example using babel 7 #6983

Merged

SimenB closed this as completed in #6983 Sep 18, 2018

jestjs locked as resolved and limited conversation to collaborators Sep 21, 2018

Requires Babel "^7.0.0-0", but was loaded with "6.26.3". #6913

Requires Babel "^7.0.0-0", but was loaded with "6.26.3". #6913

Comments

dmurphy5 commented Aug 29, 2018

🐛 Bug Report

To Reproduce

Expected behavior

Link to repl or repo (highly encouraged)

Run npx envinfo --preset jest

davidcalhoun commented Aug 29, 2018 • edited Loading

jorgegonzalez commented Aug 30, 2018

SimenB commented Aug 30, 2018

herodrigues commented Aug 30, 2018 • edited Loading

matthamil commented Aug 30, 2018 • edited Loading

dmurphy5 commented Aug 30, 2018 • edited Loading

herodrigues commented Aug 31, 2018

g-plane commented Aug 31, 2018 • edited Loading

baldurh commented Aug 31, 2018

matthamil commented Aug 31, 2018

jaywcjlove commented Sep 1, 2018

DBosley commented Sep 6, 2018

phil-lgr commented Sep 8, 2018

tdd commented Sep 10, 2018

herodrigues commented Sep 10, 2018 • edited Loading

tdd commented Sep 10, 2018 via email

DBosley commented Sep 10, 2018

SimenB commented Sep 15, 2018

kettanaito commented Sep 15, 2018 • edited Loading

SimenB commented Sep 15, 2018

DBosley commented Sep 17, 2018

herodrigues commented Sep 17, 2018 • edited Loading

SimenB commented Sep 17, 2018

gpbl commented Sep 17, 2018

tyler-johnson commented Sep 17, 2018

SimenB commented Sep 18, 2018

tdd commented Sep 18, 2018

tdd commented Sep 18, 2018

SimenB commented Sep 18, 2018 • edited Loading

tdd commented Sep 18, 2018 via email

panjiesw commented Sep 18, 2018

SimenB commented Sep 21, 2018 • edited Loading

herodrigues commented Sep 21, 2018

DBosley commented Sep 21, 2018

SimenB commented Sep 21, 2018 • edited Loading

gaearon commented Jan 17, 2019

SimenB commented Jan 17, 2019 • edited Loading

Run `npx envinfo --preset jest`

davidcalhoun commented Aug 29, 2018 •

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herodrigues commented Aug 30, 2018 •

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matthamil commented Aug 30, 2018 •

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dmurphy5 commented Aug 30, 2018 •

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g-plane commented Aug 31, 2018 •

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herodrigues commented Sep 10, 2018 •

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kettanaito commented Sep 15, 2018 •

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herodrigues commented Sep 17, 2018 •

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SimenB commented Sep 18, 2018 •

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SimenB commented Sep 21, 2018 •

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SimenB commented Sep 21, 2018 •

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SimenB commented Jan 17, 2019 •

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