[jdk21u] RFR: 8319436: Proxy.newProxyInstance throws NPE if loader is null and interface not visible from class loader

Wed Nov 8 20:06:10 UTC 2023

This PR contains a backport of commit [8eb6f617](https://github.com/openjdk/jdk/commit/8eb6f617b3f8e2a990e4244af4e56287f9741b20) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Mandy Chung on 7 Nov 2023 and was reviewed by Alan Bateman.

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Commit messages:
 - Backport 8eb6f617b3f8e2a990e4244af4e56287f9741b20

Changes: https://git.openjdk.org/jdk21u/pull/340/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=340&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319436
  Stats: 143 lines in 2 files changed: 20 ins; 77 del; 46 mod
  Patch: https://git.openjdk.org/jdk21u/pull/340.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/340/head:pull/340

PR: https://git.openjdk.org/jdk21u/pull/340