tests/cases/compiler/inheritanceMemberAccessorOverridingAccessor.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. tests/cases/compiler/inheritanceMemberAccessorOverridingAccessor.ts(5,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. tests/cases/compiler/inheritanceMemberAccessorOverridingAccessor.ts(11,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. tests/cases/compiler/inheritanceMemberAccessorOverridingAccessor.ts(14,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. ==== tests/cases/compiler/inheritanceMemberAccessorOverridingAccessor.ts (4 errors) ==== class a { get x() { ~ !!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. return "20"; } set x(aValue: string) { ~ !!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. } } class b extends a { get x() { ~ !!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. return "20"; } set x(aValue: string) { ~ !!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher. } }