RFR: 8320144: Compilation crashes when a custom annotation with invalid default value is used [v3]

[Aggelos Biboudis]

> The erroneous case of:
> 
> `public String[] excludeModules() default new String[0];`
> 
> was not short-circuited in the compiler and we were getting an NPE in `l.nonEmpty()` for `l`. Now, `getAnnotationArrayValue` returns the error attribute, if that case is detected.

Aggelos Biboudis has updated the pull request incrementally with one additional commit since the last revision:

  Address Jan's review

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/16977/files
  - new: https://git.openjdk.org/jdk/pull/16977/files/c746af14..83340888

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16977&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16977&range=01-02

  Stats: 15 lines in 1 file changed: 4 ins; 4 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/16977.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16977/head:pull/16977

PR: https://git.openjdk.org/jdk/pull/16977