tests/cases/compiler/propertyParameterWithQuestionMark.ts(9,5): error TS2322: Type 'C' is not assignable to type '{ x: any; }'.
  Property 'x' is optional in type 'C' but required in type '{ x: any; }'.


==== tests/cases/compiler/propertyParameterWithQuestionMark.ts (1 errors) ====
    class C {
        constructor(public x?) { }
    }
    
    // x should be an optional property
    var v: C = {}; // Should succeed
    var v2: { x? }
    v = v2; // Should succeed
    var v3: { x } = new C; // Should fail
        ~~
!!! error TS2322: Type 'C' is not assignable to type '{ x: any; }'.
!!! error TS2322:   Property 'x' is optional in type 'C' but required in type '{ x: any; }'.