Array.prototype[H.unscopables] is undefined in Firefox

[voronianski]

Is anybody experiencing this exception in Firefox?

TypeError: Array.prototype[H.unscopables] is undefined

FF 47.0.1, OS X 10.11.5, es6-shim 0.35.1

[ljharb]

That seems like a minification issue (it works fine on the unminified source) - are you minifying es6-shim yourself, or using our build? Can you provide a jsfiddle or similar that can reproduce the problem?