RFR: 8309515: Stale cached data from Matcher.namedGroups() after Matcher.usePattern() [v3]

[Roger Riggs]

On Wed, 7 Jun 2023 19:14:36 GMT, Raffaello Giulietti <rgiulietti at openjdk.org> wrote:

>> The cached `namedGroup` field must be invalidated during an invocation of `Matcher.usePattern()`
>
> Raffaello Giulietti has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added descriptions to the RuntimeExceptions in the test.

LGTM, Thanks for the updates.

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Marked as reviewed by rriggs (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/14350#pullrequestreview-1468436579