Hello,

I've got a crash when doing shutdown:

Kernel: 4.99.33 built on Oct 14 15:57:29 CEST 2007

-----
Done running shutdown hooks.
Oct 16 16:21:35  syslogd: Exiting on signal 15
syncing disks... done
unmounting file systems...
unmounting /kern (kernfs)...
unmounting /usr/pkg/etc (<above>:/local/usr/pkg/etc)...
unmounting /root (<above>:/local/root)...panic: kernel diagnostic 
assertion "(flags & 
~(LK_INTERLOCK|LK_SHARED|LK_EXCLUSIVE|LK_DRAIN|LK_NOWAIT|LK_RETRY| 
LK_SETRECURSE|LK_CANRECURSE)) == 0" failed: file 
"/netbsd/src/sys/kern/vfs_vnops.c", line 671
fatal breakpoint trap in supervisor mode
trap type 1 code 0 eip c03dcfe9 cs 9 eflags 246 cr2 0 ilevel 0
Stopped in pid 1529.1 (halt) at netbsd:breakpoint+0x1:  ret  
db> bt                                                    
breakpoint(c049c57c,c0459f8b,c049505c,c0495028,29f) at netbsd:breakpoint+0x1
__kernassert(c0459f8b,c0495028,29f,c049505c,7) at netbsd:__kernassert+0x39 
vn_lock(cb27a498,800002,cb3029dc,c04f5d80,cb2ea410) at netbsd:vn_lock+0xce
union_lock(cb3029f0,0,cb2ea410,c044f760,cb27a3dc) at netbsd:union_lock+0x13f
VOP_LOCK(cb27a3dc,810007,3,cb2bbc40,0) at netbsd:VOP_LOCK+0x25             
vclean(0,0,0,0,cb2ea410) at netbsd:vclean+0x5a               
vgonel(cb27a3dc,cb2bbc40,cb302a8c,c0397605,cb302a80) at netbsd:vgonel+0x53
vflush(c0c24000,0,2,c03082c0,0) at netbsd:vflush+0x8c                    
union_unmount(c0c24000,80000,cb2bbc40,cb2bbc40,c0c2401c) at 
netbsd:union_unmount
+0xdf                                                                           

dounmount(c0c24000,80000,cb2bbc40,0,cb302b38) at netbsd:dounmount+0xac
vfs_unmountall(cb2bbc40,0,0,c031866d,ca76c230) at netbsd:vfs_unmountall+0xaf
vfs_shutdown(0,0,0,c0394df1,0) at netbsd:vfs_shutdown+0x8e                 
cpu_reboot(808,0,0,0,0) at netbsd:cpu_reboot+0x108       
sys_reboot(cb2bbc40,cb302c48,cb302c68,cb302ce0,bbb9f400) at 
netbsd:sys_reboot+0x
68                                                                              

syscall_plain() at netbsd:syscall_plain+0x136
--- syscall (number 208) ---                
0xbbaf17a7:                
db>