he/him 
Want to avoid people accidentally converting your object to a primitive in ES6 due to type coercion? https://6to5.org/repl.html#?code=class%20Foo%20extends%20null%20%7B%7D%0Anew%20Foo()%2B''&experimental=true&playground=true&evaluate=true …
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@getify ah it should fail (extends param should be a left hand value), but you can use https://6to5.org/repl.html#?code=function%20Epsilon()%20%7B%7D%0AEpsilon.prototype%3Dnull%3B%0A%0Aclass%20Foo%20extends%20Epsilon%20%7B%7D%0Anew%20Foo()%2B''&experimental=true&playground=true&evaluate=true … to have the proper syntax
@bradleymeck @getify Looks like an acorn bug. I've opened an issue https://github.com/marijnh/acorn/issues/185 …
