panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x748ed816000, opte 0xffffffffffffffff
Starting stack trace...
panic(ffffffff830680d3) at panic+0x1d0 sys/kern/subr_prf.c:229
pmap_remove_pte(fffffd806d12d5d8,fffffd8008746f60,7f83a476c000,748ed800000,748ed81b000,0) at pmap_remove_pte
pmap_do_remove(fffffd806d12d5d8,748ed717000,748ed81b000,0) at pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1909
uvm_unmap_kill_entry_withlock(fffffd8071917540,fffffd8063027108,0) at uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883
uvm_map_teardown(fffffd8071917540) at uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520
uvmspace_free(fffffd8071917540) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447
reaper(ffff800029fd8f38) at reaper+0x25b sys/kern/kern_exit.c:480
end trace frame: 0x0, count: 250
End of stack trace.