8201793: (ref) Reference object should not support cloning

[poonamparhar]

This is a clean backport of JDK-8201793 from jdk8u-ri to jdk8u-dev.

With this change, java.lang.ref.Reference::clone method always throws CloneNotSupportedException.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8201793: (ref) Reference object should not support cloning

Reviewers

• Mandy Chung (@mlchung - Reviewer) ⚠️ Review applies to a0e6a0fd
• Iris Clark (@irisclark - Author) ⚠️ Review applies to a0e6a0fd
• Andrew John Hughes (@gnu-andrew - Reviewer) ⚠️ Review applies to a0e6a0fd

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk8u-dev pull/102/head:pull/102
$ git checkout pull/102

Update a local copy of the PR:
$ git checkout pull/102
$ git pull https://git.openjdk.org/jdk8u-dev pull/102/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 102

View PR using the GUI difftool:
$ git pr show -t 102

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk8u-dev/pull/102.diff

[bridgekeeper]

👋 Welcome back poonam! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

@poonamparhar This change now passes all automated pre-integration checks.

After integration, the commit message for the final commit will be:

8201793: (ref) Reference object should not support cloning

Reviewed-by: mchung, iris, andrew

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

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[mlbridge]

Webrevs

• 01: Full (0d4c3de3)
• 00: Full (a0e6a0fd)

[mlchung]

Looks good.

[irisclark]

Spec changes match those in JSR 337 MR 4.

[gnu-andrew]

Looks good. Approved.

[poonamparhar]

/integrate

[openjdk]

Going to push as commit 3a5b2cd.

[openjdk]

@poonamparhar Pushed as commit 3a5b2cd.

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