When trying to mount a current android phone with simple-mtpfs I get an error: LIBMTP PANIC: Trying to dump the error stack of a NULL device! This has been happening for a while. I found this related upstream bug: https://github.com/phatina/simple-mtpfs/issues/37 It contains a patch for libmtp that is related to libusb. It fixes this issue for me. However the reporter calls it a workaround. I'm not familiar with the inner workings of these, so not sure if we should patch this in libmtp. CCing both maintainers.