Renault SA’s Jean-Dominique Senard says Europe hasn’t woken up to the risk that China cuts off raw material supplies, something which keeps the chairman of the French automaker up at night. “We can end up in an insane situation overnight, and no one has anticipated this,” he said on the sidelines of a conference in Aix-en-Provence. China imposed curbs this week on exports of gallium and germanium, two metals crucial to the semiconductor and electric-vehicle industries, in an escalation of the country’s tit-for-tat tech war with the US and Europe.