i386/6.0_BETA6 crash in pr_find_pagehead

[Aleksey Cheusov <cheusov%tut.by@localhost>]

Hi. I've got the following crash on i386/6.0_BETA2.
Is it something well-known and/or already fixed in RC1?

#0  0xc05ba748 in maybe_dump (howto=260) at
/srv/src_netbsd6/sys/arch/i386/i386/machdep.c:878
#1  cpu_reboot (howto=260, bootstr=0x0) at
/srv/src_netbsd6/sys/arch/i386/i386/machdep.c:899
#2  0xc07a4eba in vpanic (fmt=0xc0b59358 "kernel %sassertion \"%s\"
failed: file \"%s\", line %d ", ap=0xdc135a88 "\t\225µÀ\350ؾÀ") at
/srv/src_netbsd6/sys/kern/subr_prf.c:308
#3  0xc093e3c3 in kern_assert (fmt=0xc0b59358 "kernel %sassertion
\"%s\" failed: file \"%s\", line %d ") at
/srv/src_netbsd6/sys/lib/libkern/kern_assert.c:50
#4  0xc07a183c in pr_find_pagehead (pp=0xc0cc29c0, v=<optimized out>)
at /srv/src_netbsd6/sys/kern/subr_pool.c:470
#5  pool_do_put (pq=0xdc135b00, v=<optimized out>, pp=0xc0cc29c0) at
/srv/src_netbsd6/sys/kern/subr_pool.c:1139
#6  pool_put (pp=0xc0cc29c0, v=0xce0ee000) at
/srv/src_netbsd6/sys/kern/subr_pool.c:1263
#7  0xc07a1f07 in pool_cache_destruct_object1 (object=0xce0ee000,
pc=0xc0cc29c0) at /srv/src_netbsd6/sys/kern/subr_pool.c:2187
#8  pool_cache_invalidate_groups (pc=0xc0cc29c0, pcg=<optimized out>)
at /srv/src_netbsd6/sys/kern/subr_pool.c:2222
#9  0xc07a2dff in pool_cache_invalidate (pc=0xc0cc29c0) at
/srv/src_netbsd6/sys/kern/subr_pool.c:2280
#10 0xc07a2fe0 in pool_reclaim (pp=0xc0cc29c0) at
/srv/src_netbsd6/sys/kern/subr_pool.c:1556
#11 0xc07a32b8 in pool_drain_end (pp=0xc0cc29c0, where=96506) at
/srv/src_netbsd6/sys/kern/subr_pool.c:1668
#12 0xc08a1839 in uvm_pageout (arg=0xc39a1aa0) at
/srv/src_netbsd6/sys/uvm/uvm_pdaemon.c:346
#13 0xc0100321 in ?? ()