Is autoload broken in 2.3?

Has anyone been experiencing any issues with autoload within threads in
2.3? I have been getting some random NameErrors in situations where I
should not. I have been unable to reproduce the problem or nail down
specifically when it happens (this is why I did not put in a bug

Most recently, a NameError in this gem here:,
even though it is clearly set to autoload here:

Some possible related issues:

Here is a test case which will fail randomly using autoload.

I will put in a bug, but can just someone confirm I am not crazy here?

Related to these:

Looks like Ruby head has fixed the issue now.