Symbol();

:l

return 1

throw 1;

eval

throw {toString(){return this}};

eval = null; throw eval

// ok that resets everything

throw x;

// actually let me test this
throw {__proto__: null};

eval = 0

delete eval;
delete Function.prototype.constructor;
delete Function;

throw x;

var x = 1;

throw Object.keys(this);