Only try to pop down the submenus if we still have a _Menu #1338

src/sugar/graphics/icon.py

@@ -943,8 +943,6 @@ class CanvasIcon(hippo.CanvasBox, hippo.CanvasItem):
 
         self.set_palette(Palette(text))
 
-    palette = property(get_palette, set_palette)
-
 
 class CellRendererIcon(gtk.GenericCellRenderer):
 

src/sugar/graphics/palette.py

@@ -209,6 +209,7 @@ class Palette(PaletteWindow):
     def _popdown_submenus(self):
         # TODO explicit hiding of subitems
         # should be removed after fixing #1301
+        if self.menu is not None:
             for menu_item in self.menu.get_children():
                 if menu_item.props.submenu is not None:
                     menu_item.props.submenu.popdown()