[jdk21] RFR: 8310314: Misplaced "unnamed classes are a preview feature and are disabled by default" error

Tue Jun 20 09:35:17 UTC 2023

Hi all,

This pull request contains a backport of commit [79069c5e](https://github.com/openjdk/jdk/commit/79069c5e748a274c45dec72aad082c31eff418d1) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Jan Lahoda on 20 Jun 2023 and was reviewed by Jim Laskey.

Thanks!

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Commit messages:
 - Backport 79069c5e748a274c45dec72aad082c31eff418d1

Changes: https://git.openjdk.org/jdk21/pull/36/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=36&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310314
  Stats: 18 lines in 3 files changed: 16 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk21/pull/36.diff
  Fetch: git fetch https://git.openjdk.org/jdk21.git pull/36/head:pull/36

PR: https://git.openjdk.org/jdk21/pull/36