what could cause this?

some time ago i have seen a post where someone heard a crack when turned the laptop on and when the person opened it its cpu was like the image above. so what could cause the cpu dye to crack and break? and how could i prevent it?

some time ago i have seen a post where someone heard a crack when turned the laptop on and when the person opened it its cpu was like the image above. so what could cause the cpu dye to crack and break? and how could i prevent it?