This is on my build machine (laptop is still building its kernel), so kernel here is GENERIC. Copy/paste from serial console: panic: Assertion tty_gone(tp) failed at /usr/src/sys/sys/ttydevsw.h:191 cpuid = 7 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe085de54430 vpanic() at vpanic+0x182/frame 0xfffffe085de544b0 kassert_panic() at kassert_panic+0x126/frame 0xfffffe085de54520 tty_drain() at tty_drain+0x80/frame 0xfffffe085de54560 ttydev_leave() at ttydev_leave+0x8d/frame 0xfffffe085de54580 ttydev_close() at ttydev_close+0xaf/frame 0xfffffe085de545a0 devfs_close() at devfs_close+0x223/frame 0xfffffe085de54610 VOP_CLOSE_APV() at VOP_CLOSE_APV+0xf1/frame 0xfffffe085de54640 vn_close() at vn_close+0xcd/frame 0xfffffe085de546b0 vn_closefile() at vn_closefile+0x4a/frame 0xfffffe085de54730 devfs_close_f() at devfs_close_f+0x2c/frame 0xfffffe085de54760 _fdrop() at _fdrop+0x1a/frame 0xfffffe085de54780 closef() at closef+0x1e1/frame 0xfffffe085de54810 fdescfree_fds() at fdescfree_fds+0x9d/frame 0xfffffe085de54850 fdescfree() at fdescfree+0x46c/frame 0xfffffe085de54910 exit1() at exit1+0x4e6/frame 0xfffffe085de54990 ys_sys_exit() at sys_sys_exit+0xd/frame 0xfffffe085de549a0 amd64_syscall() at amd64_syscall+0x2db/frame 0xfffffe085de54ab0 Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe085de54ab0 --- syscall (1, FreeBSD ELF64, sys_sys_exit), rip = 0x80090801a, rsp = 0x7fffffffc248, rbp = 0x7fffffffc260 --- KDB: enter: panic [ thread pid 305 tid 100103 ] Stopped at kdb_enter+0x3b: movq $0,kdb_why db> /etc/src.conf includes 'WITH_FAST_DEPEND=1', and world & kernel were built in-place while the system had been running _at_r294319, using -DNO_CLEAN. I can probably get a crash dump; if so, I can make it available. I am also willing to poke at the debugger via serial console, given guidance. Peace, david -- David H. Wolfskill david_at_catwhisker.org Those who would murder in the name of God or prophet are blasphemous cowards. See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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