Cosmiques Arete
The route requires an abseil down a gully. I was wearing an Alpine Bod harness which doesn't have a belay loop, so the karabiner has to go around the harness itself and also the strap connecting the leg loops. It was only when I unclipped at the bottom that I found that I had attached the abseil device to the rucksack waist belt instead of to the harness. If the buckle had failed I would have only been held by the leg-loops (which also depend on buckles) and an autobloc.