Using typeof with a class before its declaration results in an error

[voithos]

TypeScript Version: 2.3-rc

Code

const foo = typeof Bar;
class Bar {}

Expected behavior:
The code should compile properly. (And did compile fine in 2.2.1)

Actual behavior:
This results in a compilation error, "Class 'Bar' used before its declaration." Flipping the order fixes the problem.

In our case, the typeof Bar is actually used in an extends Foo<typeof Bar> clause of e.g. an interface declaration, but it exhibits the same behavior as this simpler example.

Alternatively, perhaps this was a bug in 2.2.1?

[mhegazy]

Duplicate of #15102. Fixed by #15239; Fix should be in typescript@next and the next TS 2.3 release (2.3.1).