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tests/cases/conformance/es6/Symbols/symbolProperty10.ts(10,5): error TS2322: Type 'I' is not assignable to type 'C'.
Types of property '[Symbol.iterator]' are incompatible.
Property 'y' is missing in type '{ x: any; }' but required in type '{ x: any; y: any; }'.
==== tests/cases/conformance/es6/Symbols/symbolProperty10.ts (1 errors) ====
class C {
[Symbol.iterator]: { x; y };
}
interface I {
[Symbol.iterator]?: { x };
}
var i: I;
i = new C;
var c: C = i;
~
!!! error TS2322: Type 'I' is not assignable to type 'C'.
!!! error TS2322: Types of property '[Symbol.iterator]' are incompatible.
!!! error TS2322: Property 'y' is missing in type '{ x: any; }' but required in type '{ x: any; y: any; }'.
!!! related TS2728 tests/cases/conformance/es6/Symbols/symbolProperty10.ts:2:29: 'y' is declared here.
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