Build failed with old versions of valac
With old version of valac (tested with 0.40 series), properties must have body.
The "dirty" property : https://gitlab.gnome.org/GNOME/gxml/blob/master/gxml/GXmlParser.vala#L108
Example of failed build : https://launchpadlibrarian.net/416865651/buildlog_ubuntu-bionic-amd64.gxml-0.18_0.18.0+rev1535+git34a4249-1~ubuntu18.04.1_BUILDING.txt.gz
Edited by Yannick Inizan