Description:
Making all in deja-dup
make[2]: Entering directory '/build/deja-dup/src/deja-dup-28.0/deja-dup'
Making all in widgets
make[3]: Entering directory '/build/deja-dup/src/deja-dup-28.0/deja-dup/widgets'
VALAC libwidgets_la_vala.stamp
ConfigList.vala:275.41-275.49: warning: Gtk.Stock has been deprecated since 3.10
ConfigList.vala:276.37-276.45: warning: Gtk.Stock has been deprecated since 3.10
ConfigLocationFile.vala:53.41-53.49: warning: Gtk.Stock has been deprecated since 3.10
ConfigLocationFile.vala:54.41-54.49: warning: Gtk.Stock has been deprecated since 3.10

(valac:5524): GLib-GObject-WARNING **: invalid cast from 'ValaNamespace' to 'ValaTypeSymbol'

(valac:5524): GLib-GObject-WARNING **: invalid cast from 'ValaNamespace' to 'ValaTypeSymbol'
WidgetUtils.vala:63.28-63.58: error: Invalid assignment from owned expression to unowned variable
unowned List<string> caps = Notify.get_server_caps();
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
WidgetUtils.vala:65.30-65.33: error: The name `caps' does not exist in the context of `DejaDup.get_shell'
foreach (string cap in caps) {
^^^^

(valac:5524): GLib-GObject-WARNING **: invalid cast from 'ValaNamespace' to 'ValaTypeSymbol'

(valac:5524): GLib-GObject-WARNING **: invalid cast from 'ValaNamespace' to 'ValaTypeSymbol'
Compilation failed: 2 error(s), 4 warning(s)
Makefile:1035: recipe for target 'libwidgets_la_vala.stamp' failed
make[3]: *** [libwidgets_la_vala.stamp] Error 1
make[3]: Leaving directory '/build/deja-dup/src/deja-dup-28.0/deja-dup/widgets'
Makefile:840: recipe for target 'all-recursive' failed
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory '/build/deja-dup/src/deja-dup-28.0/deja-dup'
Makefile:481: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/build/deja-dup/src/deja-dup-28.0'
Makefile:412: recipe for target 'all' failed
make: *** [all] Error 2
==> ERROR: A failure occurred in build().
Aborting...

Steps to reproduce:
sudo extra-x86_64-build