Does the fact that a closure source locator is used limit reflection of type hints?

As in:
$c = function (Foo $foo) : Bar {}

Can I get reflection for $foo and for the return parameter even if a ClosureSourceLocator was used?

Fixed in 78c3f78

Should probably bubble up as an exception in our own namespace?

Is there much benefit? The exception message is very clear, we'd only be wrapping it anyway - plus if this issue goes away, then this test will start failing anyway (alerting us that we can change this expectation...)

That is true, but making an exception from a different namespace bubble up (for a known case) will cause the consumers to type-hint against the third-party lib (without importing it manually, which is a mistake), and we would have to document all @throws with third-party lib classes (again bad)

Fixed in fbbbe7c.