[jdk21] RFR: 8312976: MatchResult produces StringIndexOutOfBoundsException for groups outside match

Fri Aug 4 09:07:43 UTC 2023

Hi all,

This pull request contains a backport of commit [61c58fdd](https://github.com/openjdk/jdk/commit/61c58fdd00727da2841a052477e4f4ecfa7094d6) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Raffaello Giulietti on 4 Aug 2023 and was reviewed by Alan Bateman and Stuart Marks.

Thanks!

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Commit messages:
 - Backport 61c58fdd00727da2841a052477e4f4ecfa7094d6

Changes: https://git.openjdk.org/jdk21/pull/164/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=164&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8312976
  Stats: 88 lines in 2 files changed: 80 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk21/pull/164.diff
  Fetch: git fetch https://git.openjdk.org/jdk21.git pull/164/head:pull/164

PR: https://git.openjdk.org/jdk21/pull/164