parserParameterList11.ts(1,2): error TS2370: A rest parameter must be of an array type.
parserParameterList11.ts(1,2): error TS7019: Rest parameter 'arg' implicitly has an 'any[]' type.
parserParameterList11.ts(1,8): error TS1047: A rest parameter cannot be optional.


==== parserParameterList11.ts (3 errors) ====
    (...arg?) => 102;
     ~~~~~~~
!!! error TS2370: A rest parameter must be of an array type.
     ~~~~~~~
!!! error TS7019: Rest parameter 'arg' implicitly has an 'any[]' type.
           ~
!!! error TS1047: A rest parameter cannot be optional.