=== tests/cases/compiler/chainedSpecializationToObjectTypeLiteral.ts ===
interface Sequence<T> {
>Sequence : Symbol(Sequence, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 0))
>T : Symbol(T, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 19))

    each(iterator: (value: T) => void): void;
>each : Symbol(each, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 23))
>iterator : Symbol(iterator, Decl(chainedSpecializationToObjectTypeLiteral.ts, 1, 9))
>value : Symbol(value, Decl(chainedSpecializationToObjectTypeLiteral.ts, 1, 20))
>T : Symbol(T, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 19))

    map<U>(iterator: (value: T) => U): Sequence<U>;
>map : Symbol(map, Decl(chainedSpecializationToObjectTypeLiteral.ts, 1, 45))
>U : Symbol(U, Decl(chainedSpecializationToObjectTypeLiteral.ts, 2, 8))
>iterator : Symbol(iterator, Decl(chainedSpecializationToObjectTypeLiteral.ts, 2, 11))
>value : Symbol(value, Decl(chainedSpecializationToObjectTypeLiteral.ts, 2, 22))
>T : Symbol(T, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 19))
>U : Symbol(U, Decl(chainedSpecializationToObjectTypeLiteral.ts, 2, 8))
>Sequence : Symbol(Sequence, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 0))
>U : Symbol(U, Decl(chainedSpecializationToObjectTypeLiteral.ts, 2, 8))

    filter(iterator: (value: T) => boolean): Sequence<T>;
>filter : Symbol(filter, Decl(chainedSpecializationToObjectTypeLiteral.ts, 2, 51))
>iterator : Symbol(iterator, Decl(chainedSpecializationToObjectTypeLiteral.ts, 3, 11))
>value : Symbol(value, Decl(chainedSpecializationToObjectTypeLiteral.ts, 3, 22))
>T : Symbol(T, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 19))
>Sequence : Symbol(Sequence, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 0))
>T : Symbol(T, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 19))

    groupBy<K>(keySelector: (value: T) => K): Sequence<{ key: K; items: T[]; }>;
>groupBy : Symbol(groupBy, Decl(chainedSpecializationToObjectTypeLiteral.ts, 3, 57))
>K : Symbol(K, Decl(chainedSpecializationToObjectTypeLiteral.ts, 4, 12))
>keySelector : Symbol(keySelector, Decl(chainedSpecializationToObjectTypeLiteral.ts, 4, 15))
>value : Symbol(value, Decl(chainedSpecializationToObjectTypeLiteral.ts, 4, 29))
>T : Symbol(T, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 19))
>K : Symbol(K, Decl(chainedSpecializationToObjectTypeLiteral.ts, 4, 12))
>Sequence : Symbol(Sequence, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 0))
>key : Symbol(key, Decl(chainedSpecializationToObjectTypeLiteral.ts, 4, 56))
>K : Symbol(K, Decl(chainedSpecializationToObjectTypeLiteral.ts, 4, 12))
>items : Symbol(items, Decl(chainedSpecializationToObjectTypeLiteral.ts, 4, 64))
>T : Symbol(T, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 19))
}

var s: Sequence<string>;
>s : Symbol(s, Decl(chainedSpecializationToObjectTypeLiteral.ts, 7, 3))
>Sequence : Symbol(Sequence, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 0))

var s2 = s.groupBy(s => s.length);
>s2 : Symbol(s2, Decl(chainedSpecializationToObjectTypeLiteral.ts, 8, 3))
>s.groupBy : Symbol(Sequence.groupBy, Decl(chainedSpecializationToObjectTypeLiteral.ts, 3, 57))
>s : Symbol(s, Decl(chainedSpecializationToObjectTypeLiteral.ts, 7, 3))
>groupBy : Symbol(Sequence.groupBy, Decl(chainedSpecializationToObjectTypeLiteral.ts, 3, 57))
>s : Symbol(s, Decl(chainedSpecializationToObjectTypeLiteral.ts, 8, 19))
>s.length : Symbol(String.length, Decl(lib.d.ts, 414, 19))
>s : Symbol(s, Decl(chainedSpecializationToObjectTypeLiteral.ts, 8, 19))
>length : Symbol(String.length, Decl(lib.d.ts, 414, 19))

var s3 = s2.each(x => { x.key /* Type is K, should be number */ });
>s3 : Symbol(s3, Decl(chainedSpecializationToObjectTypeLiteral.ts, 9, 3))
>s2.each : Symbol(Sequence.each, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 23))
>s2 : Symbol(s2, Decl(chainedSpecializationToObjectTypeLiteral.ts, 8, 3))
>each : Symbol(Sequence.each, Decl(chainedSpecializationToObjectTypeLiteral.ts, 0, 23))
>x : Symbol(x, Decl(chainedSpecializationToObjectTypeLiteral.ts, 9, 17))
>x.key : Symbol(key, Decl(chainedSpecializationToObjectTypeLiteral.ts, 4, 56))
>x : Symbol(x, Decl(chainedSpecializationToObjectTypeLiteral.ts, 9, 17))
>key : Symbol(key, Decl(chainedSpecializationToObjectTypeLiteral.ts, 4, 56))