Halfway through a Tuesday I felt something give. One of the tabs the lock passes through had snapped clean off. Nothing hurt, nothing was sharp, but the whole thing was suddenly held together by one side and there was an edge where the tab used to be.
I was at work, in an office, with no way to get it off because the key is at home. I spent six hours being extremely careful and then dealt with it in the evening.
Everything is fine. But I would like to know what people do about this in advance, because my plan turned out to be hope.