Object.keys(this)
Object.keys(this).forEach(key => delete this[key])
SyntaxError: Unexpected token '&'
Object.keys(this)
delete global
ReferenceError: util is not defined
performance
ReferenceError: performance is not defined
Object.keys(this)
global,Function,eval
Array.isArray(this)
SyntaxError: Unexpected end of input
this.toString()
JSON.stringify(this)
TypeError: Converting circular structure to JSON --> starting at object with constructor 'global' --- property 'global' closes the circle
ReferenceError: gt is not defined
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