tests/cases/compiler/inheritanceStaticAccessorOverridingMethod.ts(7,7): error TS2417: Class static side 'typeof b' incorrectly extends base class static side 'typeof a'. Types of property 'x' are incompatible. Type 'string' is not assignable to type '() => string'. tests/cases/compiler/inheritanceStaticAccessorOverridingMethod.ts(8,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. tests/cases/compiler/inheritanceStaticAccessorOverridingMethod.ts(11,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. ==== tests/cases/compiler/inheritanceStaticAccessorOverridingMethod.ts (3 errors) ==== class a { static x() { return "20"; } } class b extends a { ~ !!! error TS2417: Class static side 'typeof b' incorrectly extends base class static side 'typeof a'. !!! error TS2417: Types of property 'x' are incompatible. !!! error TS2417: Type 'string' is not assignable to type '() => string'. static get x() { ~ !!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. return "20"; } static set x(aValue: string) { ~ !!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. } }