Bug#1053054: libnb-platform18-java: FTBFS with default Java 21

[Vladimir Petko]

Source: libnb-platform18-java
Version: 12.1-2
Severity: important
Tags: ftbfs
User: debian-java at lists.debian.org
Usertags: default-java21
X-Debbugs-Cc: vladimir.petko at canonical.com

Dear Maintainers,

The package libnb-platform18-java ftbfs with default Java 21.
The relevant part of the build log:
---------------
-do-compile:
 [nb-javac] Compiling 76 source files to /<<PKGBUILDDIR>>/platform/o.n.core/build/classes
   [repeat] warning: [options] bootstrap class path not set in conjunction with -source 7
   [repeat] error: Source option 7 is no longer supported. Use 8 or later.
   [repeat] error: Target option 7 is no longer supported. Use 8 or later.
  [nbmerge] Failed to build target: all-o.n.core

BUILD FAILED
/<<PKGBUILDDIR>>/nbbuild/build.xml:579: The following error occurred while executing this line:
/<<PKGBUILDDIR>>/nbbuild/build.xml:574: The following error occurred while executing this line:
/<<PKGBUILDDIR>>/nbbuild/build.xml:604: The following error occurred while executing this line:
/<<PKGBUILDDIR>>/nbbuild/build.xml:651: The following error occurred while executing this line:
/<<PKGBUILDDIR>>/nbbuild/templates/common.xml:204: Compile failed; see the compiler error output for details.

Total time: 24 seconds
make[1]: *** [debian/rules:53: override_dh_auto_build] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:46: build] Error 2
dpkg-buildpackage: error: debian/rules build subprocess returned exit status 2
---------------


-- System Information:
Debian Release: bookworm/sid
  APT prefers lunar-updates
  APT policy: (500, 'lunar-updates'), (500, 'lunar-security'), (500, 'lunar'), (100, 'lunar-backports')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.2.0-33-generic (SMP w/32 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled