Prod build failing for angular cli version 8.3.0-8.3.25 Could not find plugin "proposal-numeric-separator"

[s-tyler-smith]

🐞 Bug report

Command (mark with an x)

• new
• build
• serve
• test
• e2e
• generate
• add
• update
• lint
• xi18n
• run
• config
• help
• version
• doc

Is this a regression?

Yes, the previous version in which this bug was not present was: ....

@angular/[email protected]

Description

A clear and concise description of the problem...

When running ng build --prod there is an error when generating the es5 bundle:

🔬 Minimal Reproduction

npm install @angular/cli@8
ng new repro-app
cd repro-app
ng build --prod
see error

🔥 Exception or Error

An unhandled exception occurred: [BABEL] /client-apps/repro-app/dist/repro-app/main-es2015.6786a47696d7751389b0.js: Could not find plugin "proposal-numeric-separator". Ensure there is an entry in ./available-plugins.js for it. (While processing: "/client-apps/repro-app/node_modules/@babel/preset-env/lib/index.js")
See "/private/var/folders/w8/2mcdmr7113g7_r0p0jp_cbs1j0_jjp/T/ng-ndBWC7/angular-errors.log" for further details.

where "/private/var/folders/w8/2mcdmr7113g7_r0p0jp_cbs1j0_jjp/T/ng-ndBWC7/angular-errors.log" is

Error: [BABEL] /client-apps/repro-app/dist/repro-app/main-es2015.6786a47696d7751389b0.js: Could not find plugin "proposal-numeric-separator". Ensure there is an entry in ./available-plugins.js for it. (While processing: "/client-apps/repro-app/node_modules/@babel/preset-env/lib/index.js")
    at getPlugin (/client-apps/repro-app/node_modules/@babel/preset-env/lib/index.js:67:11)
    at Array.from.map.pluginName (/client-apps/repro-app/node_modules/@babel/preset-env/lib/index.js:258:62)
    at Array.map (<anonymous>)
    at _default (/client-apps/repro-app/node_modules/@babel/preset-env/lib/index.js:258:43)
    at /client-apps/repro-app/node_modules/@babel/helper-plugin-utils/lib/index.js:19:12
    at /client-apps/repro-app/node_modules/@babel/core/lib/config/full.js:179:14
    at Generator.next (<anonymous>)
    at Function.<anonymous> (/client-apps/repro-app/node_modules/@babel/core/lib/gensync-utils/async.js:26:3)
    at Generator.next (<anonymous>)
    at step (/client-apps/repro-app/node_modules/gensync/index.js:254:32)
    at evaluateAsync (/client-apps/repro-app/node_modules/gensync/index.js:284:5)
    at Function.errback (/client-apps/repro-app/node_modules/gensync/index.js:108:7)
    at errback (/client-apps/repro-app/node_modules/@babel/core/lib/gensync-utils/async.js:70:18)
    at async (/client-apps/repro-app/node_modules/gensync/index.js:183:31)
    at onFirstPause (/client-apps/repro-app/node_modules/gensync/index.js:209:13)

🌍 Your Environment

     _                      _                 ____ _     ___
    / \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|
   / △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |
  / ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |
 /_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___|
                |___/
    

Angular CLI: 8.3.25
Node: 10.17.0
OS: darwin x64
Angular: 8.2.14
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.803.25
@angular-devkit/build-angular     0.803.25
@angular-devkit/build-optimizer   0.803.25
@angular-devkit/build-webpack     0.803.25
@angular-devkit/core              8.3.25
@angular-devkit/schematics        8.3.25
@angular/cli                      8.3.25
@ngtools/webpack                  8.3.25
@schematics/angular               8.3.25
@schematics/update                0.803.25
rxjs                              6.4.0
typescript                        3.5.3
webpack                           4.39.2

Anything else relevant?

This issue seems to be replicable with the auto-generated angular project. If it helps i included the router and used scss during the cli options phase.

I have also tried with node 12.13.1. Same results

I've tried installing each angular/cli version from 8.2.0-8.3.25, last one that worked was 8.2.2. 8.3.0 is when the build converted to using the "Generating ES5 bundles for differential loading.." stage instead a separate build.

Seems to be something about the @babel/present-env.

[clydin]

Duplicate of #17262

[hanoj-budime]

worked for me

https://stackoverflow.com/questions/60787334/ionic-android-build-fails-with-could-not-find-plugin-proposal-numeric-separator

This is how i fixed the exact same exception :

1-Open package.json and add

 "resolutions": {
  "@babel/preset-env": "^7.8.7"
 },

 "dependencies": {..}

2- run npx npm-force-resolutions

3- run npm install

Now you're good to go..

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