tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors2.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
==== tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors2.ts (1 errors) ====
class C {
set Foo(a) { }
~~~
!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
}