PANIC: ggatec destroy (6-Beta1)

Hello,

I got the following panic whil playing with ggate:
test3:/#39: ggatec destroy -u 1
GEOM_GATE: Device ggate1 destroyed.


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0xdeadc0de
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc05e9a48
stack pointer           = 0x28:0xd6f64ae4
frame pointer           = 0x28:0xd6f64ae4
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 537 (ggatec)
[thread pid 537 tid 100084 ]
Stopped at      strlen+0x8:     cmpb    $0,0(%edx)
db> where
Tracing pid 537 tid 100084 td 0xc1f45d80
strlen(deadc0de,d6f64bd0,c1ffa10c,c1f45d80,c058b1b5) at strlen+0x8
kvprintf(c07597b4,c0595d70,d6f64bd0,a,d6f64c18) at kvprintf+0x679
vsnprintf(c07c1b00,100,c07597b4,d6f64c14,100) at vsnprintf+0x3c
panic(c07597b4,deadc0de,c0751bdc,21d,c054910a) at panic+0x61
_mtx_lock_flags(c1f51038,0,c0751bdc,21d,0) at _mtx_lock_flags+0x69
g_gate_ioctl(c19aee00,c0286d03,c1fecd00,3,c1f45d80) at g_gate_ioctl+0x440
devfs_ioctl_f(c1d5e708,c0286d03,c1fecd00,c1fbbc00,c1f45d80) at 
devfs_ioctl_f+0x105
ioctl(c1f45d80,d6f64d04,c,421,3) at ioctl+0x45d
syscall(3b,3b,3b,0,0) at syscall+0x290
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (54, FreeBSD ELF32, ioctl), eip = 0x2811786f, esp = 0xbfbde31c, 
ebp = 0xbfbde338 ---

source from today, just ask if I can provide more info!

-Harry