cannot read property 'length' of undefined

[superlbr]

in some env., os.cpus is undefined, such as turmux-app.
https://github.com/Realytics/fork-ts-checker-webpack-plugin/blob/db649e320e9350a098c7b854a1db35c9306d407c/src/index.ts#L69

[johnnyreilly]

Do you want to submit a PR that tests for the existence of cpus before reading then?

[superlbr]

static ALL_CPUS = os.cpus() ? os.cpus().length : 1;

Well, since cpus is not defined in os, os.cpus() will still throw an error, I guess.Why not

static ALL_CPUS = os.cpus ? os.cpus().length : 1;

[johnnyreilly]

Sure - submit a PR!