8327137: Add test for ConcurrentModificationException in BasicDirectoryModel

[luchenlin]

I backport this for parity with 21.0.3-oracle.

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Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8327137 needs maintainer approval

Issue

• JDK-8327137: Add test for ConcurrentModificationException in BasicDirectoryModel (Bug - P4)

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/584/head:pull/584
$ git checkout pull/584

Update a local copy of the PR:
$ git checkout pull/584
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/584/head

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$ git pr checkout 584

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https://git.openjdk.org/jdk21u-dev/pull/584.diff

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[bridgekeeper]

👋 Welcome back andrewlu! 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 change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

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

[openjdk]

⚠️ @luchenlin This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (c0326f24)

[TheRealMDoerr]

We should postpone this one. There are more backports needed. We got:
Exception in Basic L&F File Loading Thread: class java.util.ConcurrentModificationException
java.util.ConcurrentModificationException
at java.base/java.util.AbstractList$SubList.checkForComodification(AbstractList.java:906)

[luchenlin]

postpone this one due to some related issues.