keywordExpressionInternalComments.ts(4,20): error TS2790: The operand of a 'delete' operator must be optional.


==== keywordExpressionInternalComments.ts (1 errors) ====
    /*1*/ new /*2*/ Array /*3*/;
    /*1*/ typeof /*2*/ Array /*3*/;
    /*1*/ void /*2*/ Array /*3*/;
    /*1*/ delete /*2*/ Array.toString /*3*/;
                       ~~~~~~~~~~~~~~
!!! error TS2790: The operand of a 'delete' operator must be optional.
    