All recalled and destroyed apparently... .
They used what's called the "Pechiney" method, derived from the FrenchAerospace industry, to assemble those Peugeot Comete and Galaxie framesets. IIRC, I think it was actually a dry/mechanical process that actually did not use any glues but pressure form fitted the frame tubes into "keyed" sockets on the lugs instead, Think of maybe something similar to a swaged crank arm on a crankset..... So by definition, it's not a bonded frame.....
After hearing of a few cases of them starting to fail on some owners in the late 80's. Peugeot played it careful by recalling all the Galaxie and Comete bikes they sold world-wide. The dealerships replaced them with equivalent steel bikes to cover warranties and they were ordered to destroy all the Cometes and Galaxies they collected.... But like most recalls, some owners never received or heard of the recall notices and I suspect some dealers also let their employees take the bikes home.....so they still survive out there and pop up once in a while for sale.
Are they safe to ride? I suspect for most situations they could be, as long as they were not abused, as you see some of these for sale that have obviously been ridden a lot and not gently in some cases, judging from the extensive cosmetic wear on the frames and are still in one piece, but as usual, for recalled items, you will still be taking a personal risk with them as Peugeot officially condemned the bikes as unsafe.