tests/cases/compiler/restParamAsOptional.ts(1,16): error TS1047: A rest parameter cannot be optional.
tests/cases/compiler/restParamAsOptional.ts(2,16): error TS1048: A rest parameter cannot have an initializer.


==== tests/cases/compiler/restParamAsOptional.ts (2 errors) ====
    function f(...x?) { }
                   ~
!!! error TS1047: A rest parameter cannot be optional.
    function f2(...x = []) { }
                   ~
!!! error TS1048: A rest parameter cannot have an initializer.