Bug#1053048: libcobra-java: FTBFS with default Java 21

[Vladimir Petko]

Source: libcobra-java
Version: 0.98.4-6
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 libcobra-java ftbfs with default Java 21.
The relevant part of the build log:
---------------
    [javac] /<<PKGBUILDDIR>>/src/org/lobobrowser/util/ListSet.java:28: error: types List<E#1> and Set<E#2> are incompatible;
    [javac] public class ListSet implements List, Set {
    [javac]        ^
    [javac]   class ListSet inherits unrelated defaults for spliterator() from types List and Set
    [javac]   where E#1,E#2 are type-variables:
    [javac]     E#1 extends Object declared in interface List
    [javac]     E#2 extends Object declared in interface Set
    [javac] Note: Some input files additionally use or override a deprecated API.
    [javac] Note: Some input files additionally use or override a deprecated API that is marked for removal.
    [javac] Note: Some input files use unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 1 error
    [javac] 100 warnings

BUILD FAILED
/<<PKGBUILDDIR>>/debian/build.xml:14: Compile failed; see the compiler error output for details.

Total time: 3 seconds
make: *** [/usr/share/cdbs/1/class/ant.mk:39: debian/stamp-ant-build] Error 1
---------------


-- 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