When trying to compile euclide I get the following error:
[ 35%] Generating main.c, Sidebar.c, config.vapi, OutputParser.c, NewProject.c, Resources.c, Terminals.c, BuildActions.c, ProjectManager.c, Settings.c, ToolArrow.c, FlowBox.c, Templates.c
cd /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999_build/src && /usr/bin/valac-0.16 -C -b /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src -d /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999_build/src --pkg=gtk+-3.0 --pkg=granite --pkg=gee-1.0 --pkg=euclidecore --pkg=gtksourceview-3.0 --pkg=scratch --pkg=scratchcore --pkg=vte-2.90 --pkg=libpeas-1.0 --thread --vapidir=../euclidecore/ --vapidir=/var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/../vapi/ /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/main.vala /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/Sidebar.vala /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/config.vapi /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/OutputParser.vala /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/NewProject.vala /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/Resources.vala /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/Terminals.vala /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/BuildActions.vala /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/ProjectManager.vala /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/Settings.vala /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/ToolArrow.vala /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/FlowBox.vala /var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/Templates.vala
/var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/BuildActions.vala:53.13-53.106: warning: unhandled error `GLib.SpawnError'
Process.spawn_sync(project_path, {"mkdir", "build", "-p"}, null, SpawnFlags.SEARCH_PATH, null);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/main.vala:252.17-252.151: warning: unhandled error `GLib.Error'
raw_terminal.fork_command_full (Vte.PtyFlags.DEFAULT, project_path, new_arguments.to_array(), null, SpawnFlags.SEARCH_PATH, null, null);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/main.vala:545.31-545.34: error: Argument 1: Cannot convert from `bool' to `Gtk.StateType'
build_arrow.set_state(true);
^^^^
/var/tmp/portage/dev-util/euclide-9999/work/euclide-9999/src/main.vala:562.31-562.35: error: Argument 1: Cannot convert from `bool' to `Gtk.StateType'
build_arrow.set_state(false);
^^^^^
Compilation failed: 2 error(s), 2 warning(s)
These are the valid state types: http://references.valadoc.org/#!api=gtk+-3.0/Gtk.StateType
