Possibly bug in pipeline.js

[rafis]

The following code does not perform filtering:

const requestHandlers = this.filter(fn => fn.length === 2).concat(Pipeline.makeHTTPRequest);

requestHandlers should contain only three handlers Pipeline.normalizeURL, Pipeline.mergeHeaders, Pipeline.makeHTTPRequest, but it contains all six Pipeline.normalizeURL, Pipeline.mergeHeaders, Pipeline.handleHeaders, Pipeline.handleCookies, Pipeline.handleRedirect, Pipeline.makeHTTPRequest.

I've asked this question on SO:
http://stackoverflow.com/questions/42927253/javascript-after-inheriting-array-the-filter-function-becomes-broken

@eur00t detaily explained why it happens.