1:40:04mathrickBike: huh! New development. I was looking at the SBCL manual to see if it would help me make sense of of the LDB backtrace, and it mentioned looking at all threads, which I did, and there was a surprising number of them. So I went and disabled loading Verbose, which spawns background threads, and sure enough, the crash is gone
1:40:31mathrickI still have no idea why it somehow persists between runs, but at least that's a clue
1:41:38mathrickthe test code that's crashing isn't even using Verbose for anything, so merely loading it is enough to mess with things
1:58:29Bikeoh boy, maybe it's some horrid concurrency problem