[v7.21.0] includeExternalHelpers option breaking with latest @babel

[hoIIer]

I cleared node_modules and ran npm install with version 7.21.0 and when I run ember serve I get the following error:

Error: Could not find module @babel/runtime/helpers/initializerDefineProperty/_index.mjs imported from @babel/runtime/helpers/esm/initializerDefineProperty
    at missingModule (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/vendor/loader/loader.js:247:1)
    at findModule (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/vendor/loader/loader.js:258:1)
    at Module.findDeps (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/vendor/loader/loader.js:168:1)
    at findModule (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/vendor/loader/loader.js:262:1)
    at Module.findDeps (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/vendor/loader/loader.js:168:1)
    at findModule (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/vendor/loader/loader.js:262:1)
    at requireModule (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/vendor/loader/loader.js:24:1)
    at Class._extractDefaultExport (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/addon-tree-output/ember-resolver/resolvers/classic/index.js:445:1)
    at Class.resolveOther (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/addon-tree-output/ember-resolver/resolvers/classic/index.js:105:1)
    at Class.resolve (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/addon-tree-output/ember-resolver/resolvers/classic/index.js:168:1)
    at resolve (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/@ember/-internals/container/index.js:1223:1)
    at Registry.resolve (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/@ember/-internals/container/index.js:763:1)
    at Class.resolveRegistration (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/@ember/-internals/runtime/lib/mixins/registry_proxy.js:32:1)
    at setupSessionRestoration (/var/folders/9r/gp7xyl_j0l3flcwp78j7mjcr0000gn/T/broccoli-276094EuqwRsv8Chf/out-559-broccoli_merge_trees/assets/addon-tree-output/ember-simple-auth/initializers/setup-session-restoration.js:10:1)

...

I tried using npm-force-resolutions and set @babel/runtime: 7.12.0 but then I get a different error when running ember server:

Class constructor Plugin cannot be invoked without 'new'

I'm not sure if something is messed up with upstream babel or otherwise? really stuck

possibly related:
ConnectedHomes#1
babel/babel#12881

Update

I figured out that removing the following previously working config clears the error and loads the app:

    'ember-cli-babel': {
      includeExternalHelpers: true,
    },

Unsure why that would suddenly break? (ember-cli-babel 7.21.0)

[Turbo87]

FWIW we're having having a similar issue with the Qonto.com apps. we're also using includeExternalHelpers for those.

[rwjblue]

Can one of y'all make a reproduction?

[Turbo87]

@rwjblue

• clone https://github.com/Turbo87/crates.io/commits/external-helpers
• yarn
• yarn start:live
• visit http://localhost:4200

[rwjblue]

Thank you, will try to review the demo this afternoon and see what we can do to mitigate...

[rwjblue]

Can you test now that https://github.com/babel/babel/releases/tag/v7.13.9 is published? I think babel/babel#12919 was specifically fixing htis issue...

[hoIIer]

@rwjblue that fixed it for me! thanks

[Turbo87]

I can confirm. Works well on the crates.io codebase too 👍

thank you @rwjblue 🤗

[Turbo87]

looks like we're still having similar issues on some other apps though:

Could not find module @babel/runtime/helpers/esm/arrayWithHoles.js imported from @babel/runtime/helpers/esm/slicedToArray

[rwjblue]

@Turbo87 And you can confirm you only have "good" Babel runtime versions (e.g. with yarn why)?

[Turbo87]

looks like it, yes

not sure yet what the difference is to the repro in crates.io that appears to work fine now 🙈

[rwjblue]

Basically babel is including the extension in the import paths for the helpers, and our transpilation doesn't support modules at runtime including the extension.