ng build --prod throwing exception

[fyllekanin]

🐞 Bug report

Command (mark with an x)

- [ ] new
- [x ] build
- [ ] serve
- [ ] test
- [ ] e2e
- [ ] generate
- [ ] add
- [ ] update
- [ ] lint
- [ ] xi18n
- [ ] run
- [ ] config
- [ ] help
- [ ] version
- [ ] doc

Is this a regression?

No

Description

Building production for angular crashes because of Terser

🔬 Minimal Reproduction

Create a new angular app with "ng new my-app" as described on the angular.io get started
page and it will crash.

🔥 Exception or Error

`ERROR in common.162374785956ac8f24a6.js from Terser
TypeError: Cannot read property 'minify' of undefined
    at minify (C:\path\node_modules\terser-webpack-plugin\dist\minify.js:162:59)
    at module.exports (C:\path\node_modules\terser-webpack-plugin\dist\worker.js:16:41)
    at handle (C:\path\node_modules\worker-farm\lib\child\index.js:44:8)
    at process. (C:\path\node_modules\worker-farm\lib\child\index.js:51:3)
    at process.emit (events.js:182:13)
    at emit (internal/child_process.js:812:12)
    at process._tickCallback (internal/process/next_tick.js:63:19)
`

🌍 Your Environment

$ ng --version

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

Angular CLI: 7.1.4
Node: 10.13.0
OS: win32 x64
Angular: 7.1.4
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.11.4
@angular-devkit/build-angular     0.11.4
@angular-devkit/build-optimizer   0.11.4
@angular-devkit/build-webpack     0.11.4
@angular-devkit/core              7.1.4
@angular-devkit/schematics        7.1.4
@ngtools/webpack                  7.1.4
@schematics/angular               7.1.4
@schematics/update                0.11.4
rxjs                              6.3.3
typescript                        3.1.6
webpack                           4.23.1

Anything else relevant?

[teogl]

I have the same error.

This error is solved by installing the previous version of terser

npm install terser@3.14.1

Note: This is a temporary solution

[filipesilva]

This problem is related to terser/terser#251. Fix submitted in terser/terser#254 should address this.

Workaround by @sodatea in vuejs/vue-cli#3407 (comment):

For npm users: run npm i terser@3.14
For yarn users: add the following field to package.json and then rerun yarn:

"resolutions": {
  "terser": "3.14.1"
}

[johninquest]

also getting this with for the first time after updating to 7.3.0

[dalibor-sanzeru]

FYI Provided solution with "resolution" in package.json worked on:
CLI: "@angular/cli": "^7.3.0"
ANGULAR: "@angular/common": "~7.2.3"

Problem only occurs on not-default build configurations e.g.:
ng build --configuration=staging

[hpardess]

I also face this error when I run ng build --prod --build-optimizer

[ERROR] ERROR in 0.41a9786d57a2f2254213.js from Terser
[INFO] Time: 61783ms
[ERROR] TypeError: Cannot read property 'minify' of undefined
[INFO] chunk {0} 0.41a9786d57a2f2254213.js () 47.1 kB  [rendered]

[hpardess]

I also face this error when I run ng build --prod --build-optimizer

[ERROR] ERROR in 0.41a9786d57a2f2254213.js from Terser
[INFO] Time: 61783ms
[ERROR] TypeError: Cannot read property 'minify' of undefined
[INFO] chunk {0} 0.41a9786d57a2f2254213.js () 47.1 kB  [rendered]

[sysmat]

Angular CLI: 7.3.0
Node: 10.11.0
OS: win32 x64
Angular: 7.2.3
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.13.0
@angular-devkit/build-angular     0.13.0
@angular-devkit/build-optimizer   0.13.0
@angular-devkit/build-webpack     0.13.0
@angular-devkit/core              7.3.0
@angular-devkit/schematics        7.3.0
@angular/cli                      7.3.0
@ngtools/webpack                  7.3.0
@schematics/angular               7.3.0
@schematics/update                0.13.0
rxjs                              6.4.0
typescript                        3.2.4
webpack                           4.29.0

error:

ERROR in runtime.fbc6620cf651a6d9e991.js from Terser
TypeError: Cannot read property 'minify' of undefined

[rizrmd]

damnnn this is breaking my build....

[FrancescoBorzi]

Same here, getting this after updating from 7.2.3 to 7.3.0

[jasedwards]

it was caused by an error in terser. There is a workaround listed in the issue but it appears they have deployed a fix a couple hours ago anyway.
terser/terser#254 (comment)

[filipesilva]

Hello all,

Both terser and terser-webpack-plugin have released updates that address the problem. We are in the process of updating the versions we use in #13589. This should completely prevent the bug once our fix is released.

You can force your existing projects to use the new terser version directly right now as well:

• npm users do npm install --save terser@3.16.1 followed by npm uninstall --save terser
• yarn users add "resolutions": { "terser": "3.16.1" } to your package.json, run yarn, then remove the resolution from package.json

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

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