Fixed an issue in CaseFolding cache, where the cache could incorrectly hit with the code point U+0000. The issue has been found while upgrading the Unicode data to 18-alpha, and it cannot be reproduced (luckily) with the existing Unicode 17 data, so regression tests aren't provided.
------------- Commit messages: - initial commit Changes: https://git.openjdk.org/jdk/pull/30005/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=30005&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8378992 Stats: 7 lines in 1 file changed: 6 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/30005.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/30005/head:pull/30005 PR: https://git.openjdk.org/jdk/pull/30005
