GtkStatusIcon shows allocation warning on XFCE4 panel

Submitted by fujiwara

Assigned to Nick Schermer

Link to original bug (#12843)

Description

Created attachment 6835 Test program

When Gtk 3.21.5 GtkStatusIcon runs on XFCE4 panel, the following warning is output:

(a:6205): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to underallocate toplevel GtkTrayIcon 0x1a964c0. Allocation is 22x22, but minimum required size is 24x24.

The warning is not shown in Fedora 24 GTK3. The allocation warning is not shown on LXDE.

% gcc -o a a.c pkg-config --cflags --libs gtk+-3.0

Attachment 6835, "Test program":
a.c

Version: Unspecified