WowAce

The :Diable() call triggers :OnDisable() which should remove map icons; however, the dataprovider is not being removed from the WorldMapFrame so the icons remain on the map -- this is a problem

Note that MapCanvas_DataProviderBase performs an assert() when providers are removed so if HandyNotes initializes in enabled=false, this assert will fail and an error will be thrown, so it should only be called when a dataprovider has, in fact, been added.

HandyNotes:OnEnable()

	WorldMapFrame:AddDataProvider(HandyNotes.WorldMapDataProvider)
	self.WorldMapHasDataProvider = true -- This flag lets HandyNotes it is safe to call :RemoveDataProvider()

 HandyNotes:OnDisable()

	if self.WorldMapHasDataProvider then -- only attempt to remove if a provider has been given
		WorldMapFrame:RemoveDataProvider(HandyNotes.WorldMapDataProvider) 
	end
	self.WorldMapHasDataProvider = false

HandyNotes loads both Enabled and Disabled without error and the map icons are properly removed with :Disable()