panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x1b31216000, opte 0xffffffffffffffff
Starting stack trace...
panic(ffffffff830737b5) at panic+0x1d0 sys/kern/subr_prf.c:229
pmap_remove_pte(fffffd806be2fbb0,fffffd80089ca120,7f800d989000,1b31200000,1b31220000,0) at pmap_remove_pte
pmap_do_remove(fffffd806be2fbb0,1b30e60000,1b31220000,0) at pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1911
uvm_unmap_kill_entry_withlock(fffffd8058394a60,fffffd806c651d78,0) at uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865
uvm_map_teardown(fffffd8058394a60) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd8058394a60) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
reaper(ffff800029fd8518) at reaper+0x256 sys/kern/kern_exit.c:480
end trace frame: 0x0, count: 250
End of stack trace.