Class unavailable to ClassLoader crashes JavaAssist about javassist

[chibash]

The stack trace seems to show that PowerMock tried to get the return type of asObservable().

[cmelchior]

Yes, and that is the problem. The return type of asObservable() is a rx.Observable() which isn't available to the class loader.

[chibash]

So, if PowerMock requires the return type of asObservable(), Javassist could not fix the problem.
It could be possible to postpone reading a class file but, if PowerMock needs to check its definition, the class file has to be loaded anyway and an exception will be thrown.

[cmelchior]

Yes, as I wrote in the original post I was also a bit unsure if this is JavaAssists problem. Going over the code again ( https://github.com/jboss-javassist/javassist/blob/master/src/main/javassist/ClassPool.java#L444-Lundefined ) I noticed that NotFoundException is actually a checked exception, which is probably the best JavaAssist can do since any libraries using JavaAssist should then be aware that this issue could occur.

I think you are right, JavaAssist is doing the best it can in this situation and it needs to be handled higher up in the stack. Sorry for the trouble.