W: GTK::Window<94628514502080>
B: GTK::Box<94628477639936>
BW: GTK::Raw::Types::GtkWidget<94628459901552>
C[1]: GTK::Compat::Types::GList<94628459921512> D: NativeCall::Types::Pointer<94628459901872> / N: GTK::Compat::Types::GList<94628459921552> / P:
C[2]: GTK::Compat::Types::GList<94628459921552> D: NativeCall::Types::Pointer<94628459901904> / N: GTK::Compat::Types::GList<94628459921592> / P: GTK::Compat::Types::GList<94628459921632>
C[3]: GTK::Compat::Types::GList<94628459921592> D: NativeCall::Types::Pointer<94628459901936> / N:  / P: GTK::Compat::Types::GList<94628459921672>
Use of uninitialized value of type GTK::Compat::Types::GList in string context.
Methods .^name, .perl, .gist, or .say can be used to stringify it to something meaningful.
  in block  at t/01-widget.t line 57
Cannot look up attributes in a GTK::Compat::Types::GList type object
  in method data at /home/cbwood/Projects/p6-GtkPlus/lib/GTK/Compat/Types.pm6 (GTK::Compat::Types) line 27
  in block  at t/01-widget.t line 57
  in block  at /home/cbwood/Projects/p6-GtkPlus/lib/GTK/Roles/Signals.pm6 (GTK::Roles::Signals) line 17
  in method CALL-ME at /home/cbwood/Projects/rakudobrew/moar-master/install/share/perl6/sources/24DD121B5B4774C04A7084827BFAD92199756E03 (NativeCall) line 581
  in method run at /home/cbwood/Projects/p6-GtkPlus/lib/GTK/Application.pm6 (GTK::Application) line 118
  in block <unit> at t/01-widget.t line 66