8368882: NPE during text drawing on machine with JP locale

[snazarkin]

Hi all,

This pull request contains a backport of commit 4520983e from the openjdk/jdk repository.

The commit being backported was authored by Sergey Nazarkin on 3 Nov 2025 and was reviewed by Sergey Bylokhov, Phil Race and Prasanta Sadhukhan.

Thanks!

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8368882 needs maintainer approval

Issue

• JDK-8368882: NPE during text drawing on machine with JP locale (Bug - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/2448/head:pull/2448
$ git checkout pull/2448

Update a local copy of the PR:
$ git checkout pull/2448
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/2448/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 2448

View PR using the GUI difftool:
$ git pr show -t 2448

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u-dev/pull/2448.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back snazarki! 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]

⚠️ @snazarkin 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 (6783b602)

[snazarkin]

/approval request Fix the bug in the edge case of font rendering code. Tested with reproducer from the bug report.

[openjdk]

@snazarkin
8368882: The approval request has been created successfully.

[GoeLin]

Hi @snazarkin
please first backport to 25. If that is approved, you may label again.