tests/cases/compiler/recursiveInheritance3.ts(1,7): error TS2420: Class 'C' incorrectly implements interface 'I'. Property 'other' is missing in type 'C'. ==== tests/cases/compiler/recursiveInheritance3.ts (1 errors) ==== class C implements I { ~ !!! error TS2420: Class 'C' incorrectly implements interface 'I'. !!! error TS2420: Property 'other' is missing in type 'C'. public foo(x: any) { return x; } private x = 1; } interface I extends C { other(x: any): any; }