JSR-310 adds tzdb.jar to the JRE lib directory and this appears to cause closed/test/java/util/zip/ZipFile/Collectible.java to fail intermittently. Here's a sample failure:

$ java Collectible
Using /u/alanb/ws/tl/build/linux-x86_64-normal-server-release/images/j2sdk-image/jre/lib/tzdb.jar
Using /u/alanb/ws/tl/build/linux-x86_64-normal-server-release/images/j2sdk-image/jre/lib/tzdb.jar
Using /u/alanb/ws/tl/build/linux-x86_64-normal-server-release/images/j2sdk-image/jre/lib/tzdb.jar
java.lang.NullPointerException: entry
at java.util.zip.ZipFile.getInputStream(ZipFile.java:340)
at Collectible.makeGarbage(Collectible.java:56)
at Collectible.realMain(Collectible.java:65)
at Collectible.main(Collectible.java:86)

Passed = 2, failed = 1