8301712: [linux] Crash on exit from WebKit 615.1

[kevinrushforth]

Clean backport. Tested in connection with 4 other WebKit fixes in the test-kcr-11.0.19 branch, including a successful CI build. I also verfied that the native WebKit code is identical to mainline jfx after applying all patches (excluding a couple of copyright years).

---

Progress

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

Issue

• JDK-8301712: [linux] Crash on exit from WebKit 615.1

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jfx11u pull/133/head:pull/133
$ git checkout pull/133

Update a local copy of the PR:
$ git checkout pull/133
$ git pull https://git.openjdk.org/jfx11u pull/133/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 133

View PR using the GUI difftool:
$ git pr show -t 133

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jfx11u/pull/133.diff

[bridgekeeper]

👋 Welcome back kcr! 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]

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

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

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

8301712: [linux] Crash on exit from WebKit 615.1

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

At the time when this comment was updated there had been no new commits pushed to the master branch. If another commit should be pushed before you perform the /integrate command, your PR will be automatically rebased. If you prefer to avoid any potential automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[mlbridge]

Webrevs

• 00: Full (6ed2e92e)

[kevinrushforth]

/integrate

[openjdk]

Going to push as commit a7a610e.
Since your change was applied there have been 4 commits pushed to the master branch:

• b0eed55: 8299977: Update WebKit to 615.1
• fc8904a: 8298167: Opacity in WebView not working anymore
• 903bef5: 8295755: Update SQLite to 3.39.4
• ac4756c: 8293375: add_definitions USE_SYSTEM_MALLOC when USE_SYSTEM_MALLOC is ON

Your commit was automatically rebased without conflicts.

[openjdk]

@kevinrushforth Pushed as commit a7a610e.

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