function test1() {
  delete Object.prototype
}
var test2 = new Function(`
  delete Object.prototype
`)
var test3 = new Function(`
  'use strict'
  delete Object.prototype
`)

var test4 = new Function(`
  'use strict'
  return function() {
    delete Object.prototype
  }
`)

try { test1() } catch (err) { console.log('test1', err.message) }
try { test2() } catch (err) { console.log('test2', err.message) }
try { test3() } catch (err) { console.log('test3', err.message) }
try { test4()() } catch (err) { console.log('test4', err.message) }