Cyclic dependencies during multi-module compilation

[Alan Bateman]

On 09/05/2018 08:30, Nicolai Parlog wrote:
>   Hi Alan,
>
> so just to get this straight, there should be a compile error, yes? I'm
> sure there was one while Java 9 was in EA and now there isn't anymore,
> which bugs the hell out of me because my book claims, there's going to
> be one. :(
>
There seems to a subtle bug in javac where the cycle detection depends 
on the ordering of the `requires` directives. I've created JDK-8202832 
[1] to track this. The bug duplicates with JDK 9 (and JDK 10 and current 
JDK 11 EA builds). You may be right that it failed correctly with older 
JDK 9 EA builds but I haven't checked yet if that is the case.

-Alan

[1] https://bugs.openjdk.java.net/browse/JDK-8202832