JBS: https://bugs.openjdk.java.net/browse/JDK-8090176 webrev for 9u: http://cr.openjdk.java.net/~flar/JDK-8090176/webrev.9u.01/
The webrev is prepared for 8u, but I will be holding off on submitting that for backport review until the fix has baked in the 9u-dev repo for a couple of weeks...
...jim