Please review this follow up to #8349. As JCK pointed out, `permits` is supposed to throw IAE on null input. However, now that we're looking up the result in a `ConcurrentHashMap`, a `NullPointerException` is thrown. This patch restores the original behavior.
Verified that the JCK test passes with this change. ------------- Commit messages: - Permits should throw IAE on null input Changes: https://git.openjdk.java.net/jdk/pull/8427/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8427&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8285696 Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod Patch: https://git.openjdk.java.net/jdk/pull/8427.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/8427/head:pull/8427 PR: https://git.openjdk.java.net/jdk/pull/8427
