0.12.x fails to build with new vala >= 0.41.x
Geary 0.12.3 fails to build on openSUSE Tumbleweed with upcoming vala 0.42 (0.41.92)
[ 72s] [ 26%] Generating it/star.page
[ 72s] cd /home/abuild/rpmbuild/BUILD/geary-0.12.3/build/help && mkdir -p /home/abuild/rpmbuild/BUILD/geary-0.12.3/build/help/it && /usr/bin/xml2po -m mallard -p /home/abuild/rpmbuild/BUILD/geary-0.12.3/help/it/it.po -o /home/abuild/rpmbuild/BUILD/geary-0.12.3/build/help/it/star.page /home/abuild/rpmbuild/BUILD/geary-0.12.3/help/C/star.page
[ 72s] /home/abuild/rpmbuild/BUILD/geary-0.12.3/src/engine/api/geary-account-information.vala:134.5-134.30: error: Property `Geary.AccountInformation.save_sent_mail' with custom `get' accessor and/or `set' mutator cannot have `default' value
[ 72s] public bool save_sent_mail {
[ 72s] ^^^^^^^^^^^^^^^^^^^^^^^^^^
[ 72s] [ 27%] Generating it/write.page
...snip
[ 73s] cd /home/abuild/rpmbuild/BUILD/geary-0.12.3/build/help && mkdir -p /home/abuild/rpmbuild/BUILD/geary-0.12.3/build/help/pt_BR && /usr/bin/xml2po -m mallard -p /home/abuild/rpmbuild/BUILD/geary-0.12.3/help/pt_BR/pt_BR.po -o /home/abuild/rpmbuild/BUILD/geary-0.12.3/build/help/pt_BR/preferences.page /home/abuild/rpmbuild/BUILD/geary-0.12.3/help/C/preferences.page
[ 73s] Compilation failed: 1 error(s), 0 warning(s)
[ 73s] make[2]: *** [src/CMakeFiles/geary-engine.dir/build.make:1249: src/.geary-engine.stamp] Error 1
[ 73s] make[2]: Leaving directory '/home/abuild/rpmbuild/BUILD/geary-0.12.3/build'
[ 73s] make[1]: *** [CMakeFiles/Makefile2:783: src/CMakeFiles/geary-engine.dir/all] Error 2
[ 73s] make[1]: *** Waiting for unfinished jobs....
... snip
[ 73s] make[1]: Leaving directory '/home/abuild/rpmbuild/BUILD/geary-0.12.3/build'
[ 73s] make: *** [Makefile:133: all] Error 2
[ 73s] error: Bad exit status from /var/tmp/rpm-tmp.FkSxRf (%build)
[ 73s]
[ 73s]
[ 73s] RPM build errors:
[ 73s] Bad exit status from /var/tmp/rpm-tmp.FkSxRf (%build)
[ 73s]
[ 73s] lamb20 failed "build geary.spec" at Tue Aug 28 12:27:51 UTC 2018.
Full buildlog available at https://build.opensuse.org/build/GNOME:Next/openSUSE_Factory/x86_64/geary/_log
Spec etc at https://build.opensuse.org/package/show/GNOME:Next/geary