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=== tests/cases/compiler/indexIntoArraySubclass.ts ===
interface Foo2<T> extends Array<T> { }
>Foo2 : Symbol(Foo2, Decl(indexIntoArraySubclass.ts, 0, 0))
>T : Symbol(T, Decl(indexIntoArraySubclass.ts, 0, 15))
>Array : Symbol(Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>T : Symbol(T, Decl(indexIntoArraySubclass.ts, 0, 15))
var x2: Foo2<string>;
>x2 : Symbol(x2, Decl(indexIntoArraySubclass.ts, 1, 3))
>Foo2 : Symbol(Foo2, Decl(indexIntoArraySubclass.ts, 0, 0))
var r = x2[0]; // string
>r : Symbol(r, Decl(indexIntoArraySubclass.ts, 2, 3))
>x2 : Symbol(x2, Decl(indexIntoArraySubclass.ts, 1, 3))
r = 0; //error
>r : Symbol(r, Decl(indexIntoArraySubclass.ts, 2, 3))
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