Bug#907934: gnome-usage FTBFS with vala 0.42.0-1

[Adrian Bunk]

Source: gnome-usage
Version: 3.28.0-1
Severity: serious
Tags: ftbfs

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

...
FAILED: src/src@@gnome-usage at exe/application.c src/src@@gnome-usage at exe/color-rectangle.c src/src@@gnome-usage at exe/cpu-graph-table.c src/src@@gnome-usage at exe/cpu-graph.c src/src@@gnome-usage at exe/cpu-monitor.c src/src@@gnome-usage at exe/cpu-sub-view.c src/src@@gnome-usage at exe/gnome-usage.c src/src@@gnome-usage at exe/graph-block-row.c src/src@@gnome-usage at exe/graph-block.c src/src@@gnome-usage at exe/graph-box.c src/src@@gnome-usage at exe/graph-stack-switcher.c src/src@@gnome-usage at exe/graph-switcher-button.c src/src@@gnome-usage at exe/header-bar.c src/src@@gnome-usage at exe/memory-graph-table.c src/src@@gnome-usage at exe/memory-graph.c src/src@@gnome-usage at exe/memory-monitor.c src/src@@gnome-usage at exe/memory-speedometer.c src/src@@gnome-usage at exe/memory-sub-view.c src/src@@gnome-usage at exe/monitor.c src/src@@gnome-usage at exe/no-results-found-view.c src/src@@gnome-usage at exe/performance-view.c src/src@@gnome-usage at exe/pie-chart.c src/src@@gnome-usage at exe/process-list-box.c src/src@@gnome-usage at exe/process-row.c src/src@@gnome-usage at exe/process.c src/src@@gnome-usage at exe/quit-process-dialog.c src/src@@gnome-usage at exe/settings.c src/src@@gnome-usage at exe/speedometer.c src/src@@gnome-usage at exe/storage-actionbar.c src/src@@gnome-usage at exe/storage-analyzer.c src/src@@gnome-usage at exe/storage-graph.c src/src@@gnome-usage at exe/storage-item.c src/src@@gnome-usage at exe/storage-list-box.c src/src@@gnome-usage at exe/storage-row.c src/src@@gnome-usage at exe/storage-view.c src/src@@gnome-usage at exe/storage-worker.c src/src@@gnome-usage at exe/swap-speedometer.c src/src@@gnome-usage at exe/system-monitor.c src/src@@gnome-usage at exe/utils.c src/src@@gnome-usage at exe/view.c src/src@@gnome-usage at exe/window.c 
valac -C /build/1st/gnome-usage-3.28.0/vapi/rg.vapi --pkg posix /build/1st/gnome-usage-3.28.0/vapi/egg.vapi /build/1st/gnome-usage-3.28.0/vapi/config.vapi --pkg libgtop-2.0 --pkg gtk+-3.0 --pkg gobject-2.0 --target-glib 2.38 --pkg glib-2.0 --pkg gio-2.0 --color=always --directory src/src@@gnome-usage at exe --basedir ../src --gresources=../data/org.gnome.Usage.gresource.xml --vapidir=/build/1st/gnome-usage-3.28.0/vapi ../src/application.vala ../src/color-rectangle.vala ../src/cpu-graph-table.vala ../src/cpu-graph.vala ../src/cpu-monitor.vala ../src/cpu-sub-view.vala ../src/gnome-usage.vala ../src/graph-block-row.vala ../src/graph-block.vala ../src/graph-box.vala ../src/graph-stack-switcher.vala ../src/graph-switcher-button.vala ../src/header-bar.vala ../src/memory-graph-table.vala ../src/memory-graph.vala ../src/memory-monitor.vala ../src/memory-speedometer.vala ../src/memory-sub-view.vala ../src/monitor.vala ../src/no-results-found-view.vala ../src/performance-view.vala ../src/pie-chart.vala ../src/process-list-box.vala ../src/process-row.vala ../src/process.vala ../src/quit-process-dialog.vala ../src/settings.vala ../src/speedometer.vala ../src/storage-actionbar.vala ../src/storage-analyzer.vala ../src/storage-graph.vala ../src/storage-item.vala ../src/storage-list-box.vala ../src/storage-row.vala ../src/storage-view.vala ../src/storage-worker.vala ../src/swap-speedometer.vala ../src/system-monitor.vala ../src/utils.vala ../src/view.vala ../src/window.vala
../src/storage-graph.vala:52.36-52.90: warning: Gtk.StyleContext.get_background_color has been deprecated since 3.16
../src/utils.vala:91.9-91.49: warning: DBus methods are recommended to throw at least `GLib.Error' or `GLib.DBusError, GLib.IOError'
        public abstract async string FindUserById (int64 id) throws IOError;
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
../src/process-row.vala:68.13-68.29: warning: implicit .begin is deprecated
../src/quit-process-dialog.vala:55.29-55.41: warning: Posix.SIGKILL has been deprecated since vala-0.40. Use Posix.Signal.KILL
../src/speedometer.vala:37.9-37.29: error: Property `Usage.Speedometer.percentage' with custom `get' accessor and/or `set' mutator cannot have `default' value
        public int percentage {
        ^^^^^^^^^^^^^^^^^^^^^
../src/graph-block.vala:70.13-70.27: warning: Gtk.Widget.margin_left has been deprecated since 3.12
Compilation failed: 1 error(s), 5 warning(s)
ninja: build stopped: subcommand failed.
dh_auto_build: cd obj-x86_64-linux-gnu && LC_ALL=C.UTF-8 ninja -j15 -v returned exit code 1
make: *** [debian/rules:8: build] Error 1