Europe's deepening debt crisis leapt to the top of the agenda of a meeting of G7 finance leaders in the Canadian Arctic on Friday amid fears that Greece's fiscal sickness was already infecting its peers. Canadian Finance Minister Jim Flaherty, host of the top-level meeting, said officials from the seven rich industrialized countries had already started talking about Europe's problems, and there was particular concern about the situation in Greece. “I think we have to be very mindful of the potential failure of domestic economies and of the persistence of some toxic assets in some banks,” Flaherty told reporters before the meeting got under way.