Breakages in jdk9/dev

FYI: It appears some changes in the JDK are exposing some bugs in the JVM. The following crash appears on OSX, and can happen during the build process: https://bugs.openjdk.java.net/browse/JDK-8155781 The following runtime crash may also be seen on 64-bit: https://bugs.openjdk.java.net/browse/JDK-8161550 David