=== tests/cases/compiler/Bar.ts ===
import Error = require('Foo');
>Error : Symbol(Error, Decl(Bar.ts, 0, 0))

class Bar extends Error {}
>Bar : Symbol(Bar, Decl(Bar.ts, 0, 30))
>Error : Symbol(Error, Decl(Bar.ts, 0, 0))

export = Bar;
>Bar : Symbol(Bar, Decl(Bar.ts, 0, 30))

=== tests/cases/compiler/Foo.ts ===

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

export = Foo;
>Foo : Symbol(Foo, Decl(Foo.ts, 0, 0))