[Pkg-mpd-maintainers] Bug#921782: gmpc: FTBFS (error: Assigning delegate without required target)

[Santiago Vila]

Package: src:gmpc
Version: 11.8.16-14
Severity: serious
Tags: ftbfs

Dear maintainer:

I tried to build this package in buster but it failed:

--------------------------------------------------------------------------------
[...]
 debian/rules build-indep
dh build-indep
   dh_update_autotools_config -i
   dh_autoreconf -i
configure.ac:44: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body
../../lib/autoconf/lang.m4:193: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2672: _AC_LINK_IFELSE is expanded from...
../../lib/autoconf/general.m4:2689: AC_LINK_IFELSE is expanded from...
m4/libtool.m4:1022: _LT_SYS_MODULE_PATH_AIX is expanded from...
m4/libtool.m4:4170: _LT_LINKER_SHLIBS is expanded from...
m4/libtool.m4:5253: _LT_LANG_C_CONFIG is expanded from...
m4/libtool.m4:138: _LT_SETUP is expanded from...
m4/libtool.m4:67: LT_INIT is expanded from...
configure.ac:44: the top level

[... snipped ...]

        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Widgets/GmpcVolume.vala:111.40-111.70: warning: use of possibly unassigned parameter `requisition'
    public override void size_request (out Gtk.Requisition requisition) {
                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Providers/music-tree.vala:212.8-212.32: warning: use of possibly unassigned parameter `list'
							list.append((owned)item);
							^^^^^^^^^^^^^^^^^^^^^^^^^
Providers/music-tree.vala:176.3-176.30: warning: use of possibly unassigned parameter `list'
		out List<MetaData.Item> list,
		^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Providers/music-tree.vala:244.3-244.27: warning: use of possibly unassigned parameter `list'
		list.concat((owned)temp);
		^^^^^^^^^^^^^^^^^^^^^^^^^
Providers/music-tree.vala:250.4-250.28: warning: use of possibly unassigned parameter `list'
			list.concat((owned)temp);
			^^^^^^^^^^^^^^^^^^^^^^^^^
Providers/music-tree.vala:256.5-256.29: warning: use of possibly unassigned parameter `list'
				list.concat((owned)temp);
				^^^^^^^^^^^^^^^^^^^^^^^^^
Providers/music-tree.vala:233.3-233.35: warning: use of possibly unassigned parameter `list'
		out List<Gmpc.MetaData.Item> list,
		^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Widgets/gmpc-widgets-qtable.vala:26.2-26.8: warning: attribute `compact' never used
[compact]
 ^^^^^^^
Providers/HTBackdrops.vala:186.23-186.30: warning: copying delegates is not supported
Providers/LyrDB.vala:240.17-240.24: warning: copying delegates is not supported
Providers/ChartLyrics.vala:109.23-109.30: warning: copying delegates is not supported
vala/gmpc-easy-command.vala:213.6-213.79: error: Assigning delegate without required target in scope
					model.get(iter, 1, out name, 2, out pattern, 3, out callback, 4, out data);
					^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
vala/gmpc-url-fetching-gui.vala:88.26-88.39: warning: copying delegates is not supported
vala/gmpc-url-fetching-gui.vala:89.29-89.45: warning: copying delegates is not supported
Compilation failed: 1 error(s), 667 warning(s)
make[4]: *** [Makefile:2201: gmpc_vala.stamp] Error 1
make[4]: Leaving directory '/<<PKGBUILDDIR>>/src'
make[3]: *** [Makefile:849: all] Error 2
make[3]: Leaving directory '/<<PKGBUILDDIR>>/src'
make[2]: *** [Makefile:498: all-recursive] Error 1
make[2]: Leaving directory '/<<PKGBUILDDIR>>'
make[1]: *** [Makefile:426: all] Error 2
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
dh_auto_build: make -j1 returned exit code 2
make: *** [debian/rules:6: build-indep] Error 2
dpkg-buildpackage: error: debian/rules build-indep subprocess returned exit status 2
--------------------------------------------------------------------------------

(The above is just how the build ends and not necessarily the most relevant part)

The build was made in my autobuilder with "dpkg-buildpackage -A"
and it also fails here:

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/gmpc.html

where you can get a full build log if you need it.

If this is really a bug in one of the build-depends, please use reassign and affects,
so that this is still visible in the BTS web page for this package.

Thanks.