The cached `namedGroup` field must be invalidated during an invocation of `Matcher.usePattern()`
------------- Commit messages: - 8309515: Stale cached data from Matcher.namedGroups() after Matcher.usePattern() Changes: https://git.openjdk.org/jdk/pull/14350/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14350&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8309515 Stats: 24 lines in 2 files changed: 23 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/14350.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14350/head:pull/14350 PR: https://git.openjdk.org/jdk/pull/14350
