Throws an exception on Node.js v.10.15.0

[yehorbk]

This line cause "TypeError: clazz is not a constructor" exception:

Mixin/JavaScript/7-build.js

Line 116 in 5339cb1

console.dir({ res });

I'm not sure, but I think that is because toString is a property with getter (when we want to call it we use obj.toString instead of obj.toString()). Consequently there is not overrided toString method in ProtoClass.

But it works fine on Node.js v12.14.0.

[tshemsedinov]

Somebody already reported and fixed this. See: nodejs/node#25451