=== tests/cases/compiler/indexClassByNumber.ts ===
// Shouldn't be able to index a class instance by a number (unless it has declared a number index signature)

class foo { }
>foo : Symbol(foo, Decl(indexClassByNumber.ts, 0, 0))

var f = new foo();
>f : Symbol(f, Decl(indexClassByNumber.ts, 4, 3))
>foo : Symbol(foo, Decl(indexClassByNumber.ts, 0, 0))

f[0] = 4; // Shouldn't be allowed
>f : Symbol(f, Decl(indexClassByNumber.ts, 4, 3))