v8.0.0 — zlib.DeflateRaw only extensible via class keyword

Version: v8.0.0
Platform: Darwin
Subsystem: zlib

Extending zlib.DeflateRaw via non-class-keyword doesn't work. You can see this in action with this example:

'use strict'
const zlib = require('zlib');
const inherits = require('util').inherits;

function NotInitialized (options) {
  zlib.DeflateRaw.call(this, options);
  this.prop = true
}
inherits(NotInitialized, zlib.DeflateRaw);
console.log(new NotInitialized())

The above prints out NotInitialized { prop: true }

What I expected it to do, was what this example does:

'use strict'
const zlib = require('zlib');
class Initialized extends zlib.DeflateRaw {
  constructor (options) {
    super(options)
    this.prop = true
  }
}
console.log(new Initialized())

Not doing this initialization means that many stream operations result in crashes. (For example, pipe.)

This shows up in the real world with crc32-stream.