1 x undefined? true

     2 TypeError: Cannot read property "foo" from undefined

     3 TypeError: Cannot set property "bar" of undefined

     4 TypeError: Cannot read property "1" from undefined

     5 TypeError: Cannot set property "0" of undefined

     6 TypeError: Cannot read property "func" from undefined

     7 TypeError: Cannot delete property "0" of undefined

     8 TypeError: Cannot delete property "foo" of undefined

     9 TypeError: undefined is not an Object

    10 TypeError: Cannot apply "with" to undefined