The package fails to build with icu 76.1-2 from experimental.  The most
likely reason is that it's not built for the default C++17 standards,
and manually specifies an earlier standard.

The build log shows the package building with -std=c++11, and failing.

[...]
In file included from /usr/include/unicode/uenum.h:25,
                  from /usr/include/unicode/ucsdet.h:28,
                  from
/<<PKGBUILDDIR>>/src/libdmusic/util/encodingdetector.cpp:27:
/usr/include/unicode/localpointer.h:561:26: error: ‘auto’ parameter not
permitted in this context
   561 | template <typename Type, auto closeFunction>
       |                          ^~~~
/usr/include/unicode/localpointer.h:573:76: error: template argument 2
is invalid
   573 |     explicit LocalOpenPointer(std::unique_ptr<Type,
decltype(closeFunction)> &&p)
       |
            ^
/usr/include/unicode/localpointer.h:583:78: error: template argument 2
is invalid
   583 |     LocalOpenPointer &operator=(std::unique_ptr<Type,
decltype(closeFunction)> &&p) {
       |
              ^
/usr/include/unicode/localpointer.h:599:59: error: template argument 2
is invalid
   599 |     operator std::unique_ptr<Type, decltype(closeFunction)> () && {
       |                                                           ^
/usr/include/unicode/uenum.h:69:1: note: invalid template non-type parameter
    69 | U_DEFINE_LOCAL_OPEN_POINTER(LocalUEnumerationPointer,
UEnumeration, uenum_close);
       | ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/unicode/ucsdet.h:109:1: note: invalid template non-type
parameter
   109 | U_DEFINE_LOCAL_OPEN_POINTER(LocalUCharsetDetectorPointer,
UCharsetDetector, ucsdet_close);
       | ^~~~~~~~~~~~~~~~~~~~~~~~~~~
make[3]: *** [src/libdmusic/CMakeFiles/dmusic.dir/build.make:159:
src/libdmusic/CMakeFiles/dmusic.dir/util/encodingdetector.cpp.o] Error 1
make[3]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'

We believe that the bug you reported is fixed in the latest version of
deepin-music, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1092315@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Boyuan Yang <byang@debian.org> (supplier of updated deepin-music package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Wed, 08 Jan 2025 21:04:36 -0500
Source: deepin-music
Architecture: source
Version: 6.2.28-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Deepin Packaging Team <pkg-deepin-devel@lists.alioth.debian.org>
Changed-By: Boyuan Yang <byang@debian.org>
Closes: 1092315
Changes:
 deepin-music (6.2.28-1) unstable; urgency=medium
 .
   * Team upload.
   * New upstream release.
   * debian/patches/0004-CMakeLists.txt-Force-c-17-not-c-11.patch:
     Add patch to force C++17 build. (Closes: #1092315)
   * debian/copyright: Minor update.
   * debian/control: Add build-dep libsdl2-dev.
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not fixed, reopening. patch at
http://launchpadlibrarian.net/769608663/deepin-music_6.2.28-1_6.2.28-1ubuntu1.diff.gz

We believe that the bug you reported is fixed in the latest version of
deepin-music, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1092315@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Boyuan Yang <byang@debian.org> (supplier of updated deepin-music package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Sun, 12 Jan 2025 20:52:02 -0500
Source: deepin-music
Architecture: source
Version: 6.2.40-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Deepin Packaging Team <pkg-deepin-devel@lists.alioth.debian.org>
Changed-By: Boyuan Yang <byang@debian.org>
Closes: 1092315 1092681
Changes:
 deepin-music (6.2.40-1) unstable; urgency=medium
 .
   * Team upload.
   * New upstream release.
   * debian/patches/0004-Bump-from-C-11-14-to-C-17.patch: Really enforce
     C++17 build. (Closes: #1092315)
   * debian/patches/0005-Support-taglib-2.x.patch: Support taglib 2.x.
     (Closes: #1092681)
   * debian/control: Use taglib 2.x build-dependency package libtag-dev.
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