tests/cases/conformance/es6/destructuring/restElementWithAssignmentPattern3.ts(3,6): error TS2322: Type 'string | number' is not assignable to type 'string'.
  Type 'number' is not assignable to type 'string'.
tests/cases/conformance/es6/destructuring/restElementWithAssignmentPattern3.ts(3,9): error TS2322: Type 'string | number' is not assignable to type 'number'.
  Type 'string' is not assignable to type 'number'.


==== tests/cases/conformance/es6/destructuring/restElementWithAssignmentPattern3.ts (2 errors) ====
    var a: string, b: number;
    var tuple: [string, number] = ["", 1];
    [...[a, b = 0]] = tuple;
         ~
!!! error TS2322: Type 'string | number' is not assignable to type 'string'.
!!! error TS2322:   Type 'number' is not assignable to type 'string'.
            ~
!!! error TS2322: Type 'string | number' is not assignable to type 'number'.
!!! error TS2322:   Type 'string' is not assignable to type 'number'.