webpack@5.0.0-alpha.20 & webpack-cli - TypeError: Cannot read property 'length' of undefined #1023

[ryanspice]

Bug report

When using webpack-cli with the latest version of webpack i get the following issue: webpack/webpack-cli#102

Seems it seems like validateschemea.js on webpack@5.0.0-alpha.20 doesnt have a return which is causing the issue, not sure if that is expected?

Fixing in my node modules aloud for a compile.

What is the current behavior?

Fails to compile with specified config file.
We see webpackConfigurationValidationErrors is returning undefined.

If the current behavior is a bug, please provide the steps to reproduce.

New webpack@5.0.0-alpha.20, webpack-cli latest, run with empty webpack.config.

Other relevant information:
webpack version: webpack@5.0.0-alpha.20
webpack-cli version: webpack@5.0.0-alpha.20
Node.js version: 3.3.7
Operating System: windows 10 bash

[sokra]

see webpack/webpack-cli#1023