RFR: 8310128: Switch with unnamed patterns erroneously non-exhaustive

Fri Jun 16 08:16:19 UTC 2023

Hi all,

This pull request contains a backport of commit [32243ef4](https://github.com/openjdk/jdk/commit/32243ef47df75241302e243b4fd9627d686437fe) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Aggelos Biboudis on 16 Jun 2023 and was reviewed by Vicente Romero and Jan Lahoda.

Thanks!

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Commit messages:
 - Backport 32243ef47df75241302e243b4fd9627d686437fe

Changes: https://git.openjdk.org/jdk21/pull/23/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=23&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310128
  Stats: 28 lines in 2 files changed: 25 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk21/pull/23.diff
  Fetch: git fetch https://git.openjdk.org/jdk21.git pull/23/head:pull/23

PR: https://git.openjdk.org/jdk21/pull/23