## Recap

* We found a Node.js bug. When `Object.defineProperty` was monkeypatched, in certain situations other things would break. For example, using `console.log` *after* the monkeypatch but *not* before (if `console.log` also appeared *before* the monkeypatch, it would work).
    * which was triggered by that kind of monkeypatch mistakenly being attached due to a syntax error in the Ruby uglifier gem’s `es5.js` shim (v2.7.1 - fixed by https://github.com/lautis/uglifier/commit/31a53a92da537af3776711471d6e9582d96dc49d, released in uglifier v3.0.0)
    * which was used as the js compressor for our static jekyll blog - luckily a direct dependency, and upgrading had no dependency conflicts - easy fix.
* Introduced in Node 11.12.0 by: https://github.com/nodejs/node/commit/c14aa07b94d684de8e2a23a54d0e6a3c25a2e460
* Fixed in Node 12.0.0 by: https://github.com/nodejs/node/commit/908292cf1f551c614a733d858528ffb13fb3a524
* [I was running Node 11.14.0.]

## Details / How
* https://gist.github.com/trptcolin/3353806872d367819f0709c4607acbb8