tests/cases/compiler/interfaceImplementation4.ts(8,7): error TS2420: Class 'C5' incorrectly implements interface 'I1'. Property 'iObj' is missing in type 'C5'. ==== tests/cases/compiler/interfaceImplementation4.ts (1 errors) ==== interface I1 { iObj:{ }; iNum:number; iAny:any; iFn():void; } class C5 implements I1 { ~~ !!! error TS2420: Class 'C5' incorrectly implements interface 'I1'. !!! error TS2420: Property 'iObj' is missing in type 'C5'. public iNum:number; public iAny:any; public iFn() { } }