RFR: 8368882: NPE during text drawing on machine with JP locale [v5]

[Phil Race]

On Mon, 20 Oct 2025 05:58:25 GMT, Sergey Nazarkin <snazarki at openjdk.org> wrote:

>> There is a reproducible bug in symbol rendering on Windows machines with [particular](https://github.com/openjdk/jdk/blob/9d71af108ea2cc3682607527246d60a19fd820ba/src/java.desktop/windows/native/libawt/windows/awt_Win32GraphicsEnv.cpp#L244) default locales. This changeset fixes the deferred font initialisation request, which now skips the last font in the list. 
>> 
>> The test (attached to the jira) was performed on a Windows 11 machine with the Japanese locale set as the default.  Without the fix, it fails with an NPE. With the fix it displays a window showing glyphs drawn by all the fonts accessible from the Java application.
>
> Sergey Nazarkin has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Get rid of eudc.reg

PS as referenced in that bug the updated INTL guide https://docs.oracle.com/en/java/javase/25/intl/font-configuration-files.html#GUID-F8ABF748-F3C3-4781-97B2-66C7E1E10EE9 says

The JDK places any files that it provides in $JDKHOME/lib.
Do not modify that location.
Instead, put any updates or custom versions of the configuration files in $JDKHOME/conf/fonts.
On platforms that support font configuration files, the runtime will look first in $JDKHOME/conf/fonts.

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PR Comment: https://git.openjdk.org/jdk/pull/27551#issuecomment-3427721018