zeitgeist Return: Cannot convert from `GLib.List<string>' to `GLib.List<weak string>'

[pacmac34]

Emerging (2 of 2) gnome-extra/zeitgeist-1.0.1::gnome-next

• zeitgeist-1.0.1.tar.xz BLAKE2B SHA512 size ;-) ... [ ok ]

Unpacking source...
Unpacking zeitgeist-1.0.1.tar.xz to /var/tmp/portage/gnome-extra/zeitgeist-1.0.1/work
Source unpacked in /var/tmp/portage/gnome-extra/zeitgeist-1.0.1/work
Preparing source in /var/tmp/portage/gnome-extra/zeitgeist-1.0.1/work/zeitgeist-1.0.1 ...
Source prepared.
Configuring source in /var/tmp/portage/gnome-extra/zeitgeist-1.0.1/work/zeitgeist-1.0.1 ...

• econf: updating zeitgeist-1.0.1/build-aux/config.guess with /usr/share/gnuconfig/config.guess
• econf: updating zeitgeist-1.0.1/build-aux/config.sub with /usr/share/gnuconfig/config.sub
  ./configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --disable-dependency-tracking --disable-silent-rules --docdir=/usr/share/doc/zeitgeist-1.0.1 --htmldir=/usr/share/doc/zeitgeist-1.0.1/html --libdir=/usr/lib64 --docdir=/usr/share/doc/zeitgeist-1.0.1 --without-dee-icu --disable-explain-queries --disable-datahub --disable-downloads-monitor --enable-telepathy --enable-introspection --enable-fts
  checking for a BSD-compatible install... /usr/lib/portage/python3.6/ebuild-helpers/xattr/install -c
  checking whether build environment is sane... yes
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  checking if x86_64-pc-linux-gnu-gcc supports -c -o file.o... (cached) yes
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  checking whether -lc should be explicitly linked in... no
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  checking how to run the C++ preprocessor... x86_64-pc-linux-gnu-g++ -E
  checking for ld used by x86_64-pc-linux-gnu-g++... /usr/x86_64-pc-linux-gnu/bin/ld -m elf_x86_64
  checking if the linker (/usr/x86_64-pc-linux-gnu/bin/ld -m elf_x86_64) is GNU ld... yes
  checking whether the x86_64-pc-linux-gnu-g++ linker (/usr/x86_64-pc-linux-gnu/bin/ld -m elf_x86_64) supports shared libraries... yes
  checking for x86_64-pc-linux-gnu-g++ option to produce PIC... -fPIC -DPIC
  checking if x86_64-pc-linux-gnu-g++ PIC flag -fPIC -DPIC works... yes
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  checking if x86_64-pc-linux-gnu-g++ supports -c -o file.o... (cached) yes
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  checking dynamic linker characteristics... (cached) GNU/Linux ld.so
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  checking for ld used by x86_64-pc-linux-gnu-gcc... /usr/x86_64-pc-linux-gnu/bin/ld -m elf_x86_64
  checking if the linker (/usr/x86_64-pc-linux-gnu/bin/ld -m elf_x86_64) is GNU ld... yes
  checking for shared library run path origin... done
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  checking for GNU gettext in libc... yes
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  checking where the gettext function comes from... libc
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  checking that generated files are newer than configure... done
  configure: creating ./config.status
  config.status: creating Makefile
  config.status: creating src/Makefile
  config.status: creating libzeitgeist/Makefile
  config.status: creating libzeitgeist/zeitgeist-2.0.pc
  config.status: creating datahub/Makefile
  config.status: creating extensions/Makefile
  config.status: creating extensions/fts++/Makefile
  config.status: creating extensions/fts++/test/Makefile
  config.status: creating data/Makefile
  config.status: creating data/ontology/Makefile
  config.status: creating python/Makefile
  config.status: creating test/Makefile
  config.status: creating test/dbus/Makefile
  config.status: creating test/direct/Makefile
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  config.status: creating test/data/Makefile
  config.status: creating examples/Makefile
  config.status: creating examples/c/Makefile
  config.status: creating examples/vala/Makefile
  config.status: creating doc/Makefile
  config.status: creating doc/libzeitgeist/Makefile
  config.status: creating po/Makefile.in
  config.status: creating config.h
  config.status: executing depfiles commands
  config.status: executing libtool commands
  config.status: executing po-directories commands
  config.status: creating po/POTFILES
  config.status: creating po/Makefile

zeitgeist-1.0.1

Build environment
Install Prefix: /usr

Optional dependencies
fts++: yes
dee-icu: no

Other build options:
DataHub: no
Telepathy provider: no
Downloads monitor: no
SQL debugging: no
libzeitgeist docs: no
GObject Introspection: yes

Source configured.
Compiling source in /var/tmp/portage/gnome-extra/zeitgeist-1.0.1/work/zeitgeist-1.0.1 ...
make -j5
cd . && /bin/sh /var/tmp/portage/gnome-extra/zeitgeist-1.0.1/work/zeitgeist-1.0.1/build-aux/missing automake-1.15 --gnu Makefile
cd . && /bin/sh ./config.status Makefile
config.status: creating Makefile
make all-recursive
make[1]: Entering directory '/var/tmp/portage/gnome-extra/zeitgeist-1.0.1/work/zeitgeist-1.0.1'
Making all in libzeitgeist
make[2]: Entering directory '/var/tmp/portage/gnome-extra/zeitgeist-1.0.1/work/zeitgeist-1.0.1/libzeitgeist'
/usr/bin/valac-0.44
--target-glib=2.36 --pkg gio-2.0 --pkg gio-unix-2.0 --pkg sqlite3 ../config.vapi -C --vapi zeitgeist-datamodel-2.0.vapi -H zeitgeist-datamodel.h --library zeitgeist-2.0
data-source.vala errors.vala mimetype.vala enumerations.vala event.vala subject.vala timerange.vala timestamp.vala ontology-uris.vala ontology.vala result-set.vala simple-result-set.vala utils.vala
ontology.vala:64.33-64.46: error: Return: Cannot convert from GLib.List<string>' to GLib.List'
if (symbol == null) return results;
^^^^^^^^^^^^^^
ontology.vala:75.13-75.26: error: Return: Cannot convert from GLib.List<string>' to GLib.List'
return results;
^^^^^^^^^^^^^^
ontology.vala:84.33-84.46: error: Return: Cannot convert from GLib.List<string>' to GLib.List'
if (symbol == null) return results;
^^^^^^^^^^^^^^
ontology.vala:89.13-89.26: error: Return: Cannot convert from GLib.List<string>' to GLib.List'
return results;
^^^^^^^^^^^^^^
ontology.vala:97.33-97.46: error: Return: Cannot convert from GLib.List<string>' to GLib.List'
if (symbol == null) return results;
^^^^^^^^^^^^^^
ontology.vala:102.13-102.26: error: Return: Cannot convert from GLib.List<string>' to GLib.List'
return results;
^^^^^^^^^^^^^^
ontology.vala:111.33-111.46: error: Return: Cannot convert from GLib.List<string>' to GLib.List'
if (symbol == null) return results;
^^^^^^^^^^^^^^
ontology.vala:116.13-116.26: error: Return: Cannot convert from GLib.List<string>' to GLib.List'
return results;
^^^^^^^^^^^^^^
Compilation failed: 8 error(s), 0 warning(s)
make[2]: *** [Makefile:1227: libzeitgeist_datamodel_2_0_la_vala.stamp] Error 1
make[2]: Leaving directory '/var/tmp/portage/gnome-extra/zeitgeist-1.0.1/work/zeitgeist-1.0.1/libzeitgeist'
make[1]: *** [Makefile:545: all-recursive] Error 1
make[1]: Leaving directory '/var/tmp/portage/gnome-extra/zeitgeist-1.0.1/work/zeitgeist-1.0.1'
make: *** [Makefile:456: all] Error 2

• ERROR: gnome-extra/zeitgeist-1.0.1::gnome-next failed (compile phase):
• emake failed
• If you need support, post the output of emerge --info '=gnome-extra/zeitgeist-1.0.1::gnome-next',
• the complete build log and the output of emerge -pqv '=gnome-extra/zeitgeist-1.0.1::gnome-next'.
• The complete build log is located at '/var/tmp/portage/gnome-extra/zeitgeist-1.0.1/temp/build.log'.
• The ebuild environment file is located at '/var/tmp/portage/gnome-extra/zeitgeist-1.0.1/temp/environment'.
• Working directory: '/var/tmp/portage/gnome-extra/zeitgeist-1.0.1/work/zeitgeist-1.0.1'
• S: '/var/tmp/portage/gnome-extra/zeitgeist-1.0.1/work/zeitgeist-1.0.1'

Failed to emerge gnome-extra/zeitgeist-1.0.1, Log file:

'/var/tmp/portage/gnome-extra/zeitgeist-1.0.1/temp/build.log'

• GNU info directory index is up-to-date.

[pacmac34]

masking dev-lang/vala from the overlay and using latest version in portage solved this issue.