Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

[Ionic v4] Build with --prod flag produces -> TypeError: Cannot read property 'minify' of undefined

See original GitHub issue

Bug Report

Ionic version: [x] 4.x

Current behavior: The problem occurs when executing the command "ionic cordova build android " with the flag --prod, if it runs without the flag, no error occurs.

Expected behavior: The APK generate with success.

Steps to reproduce: The error occurs when you run the following command:

ionic cordova build android --prod.

Generates:

...
chunk {cordova} cordova.935a9f4e1f7afeca168d.js (cordova) 71.6 kB [entry] [rendered]

ERROR in common.00974306b5124fe008c9.js from Terser
TypeError: Cannot read property 'minify' of undefined
    at minify (/home/vini/projects/minify-error/node_modules/terser-webpack-plugin/dist/minify.js:175:23)
    at module.exports (/home/vini/projects/minify-error/node_modules/terser-webpack-plugin/dist/worker.js:13:40)
    at handle (/home/vini/projects/minify-error/node_modules/worker-farm/lib/child/index.js:44:8)
    at process.<anonymous> (/home/vini/projects/minify-error/node_modules/worker-farm/lib/child/index.js:51:3)
    at process.emit (events.js:197:13)
    at emit (internal/child_process.js:828:12)
    at processTicksAndRejections (internal/process/next_tick.js:76:17)
...

Related code:

Repository with the code that generates the error:

https://github.com/H4ad/minify-errors/

Other information:

Ionic info:

Ionic:

   ionic (Ionic CLI)             : 4.6.0 (/usr/local/lib/node_modules/ionic)
   Ionic Framework               : @ionic/angular 4.0.0
   @angular-devkit/build-angular : 0.12.4
   @angular-devkit/schematics    : 7.2.4
   @angular/cli                  : 7.2.4
   @ionic/angular-toolkit        : 1.3.0

Cordova:

   cordova (Cordova CLI) : 8.1.2 (cordova-lib@8.1.1)
   Cordova Platforms     : android 7.1.4
   Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 3.1.1, (and 4 other plugins)

System:

   Android SDK Tools : 26.1.1 (/home/vini/Android/Sdk/)
   NodeJS            : v11.8.0 (/usr/bin/node)
   npm               : 6.7.0
   OS                : Linux 4.15