RFR: 8318144: Match on enum constants with body compiles but fails with MatchException [v2]

[Jan Lahoda]

> For code like:
> 
> enum E {A {}, B {} }
> Object o = E.A;
> switch (o) {
>      case E.A -> System.err.println(o);
>      default -> System.err.println("default");
> }
> 
> 
> The result is `default`, not `A`, due to incorrect classes being compared. Thanks for @liach for noting the solution here:
> https://github.com/openjdk/jdk/pull/16489#discussion_r1381411165

Jan Lahoda has updated the pull request incrementally with one additional commit since the last revision:

  Re-ordering tests as suggested.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/16499/files
  - new: https://git.openjdk.org/jdk/pull/16499/files/cd27e6e9..5f40a8eb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16499&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16499&range=00-01

  Stats: 6 lines in 1 file changed: 4 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16499.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16499/head:pull/16499

PR: https://git.openjdk.org/jdk/pull/16499