Recent vt(4) broke moused when hw.vga.textmode=1

Hi,

I have seen this panic via serial console, but the console is completely
unusable at the time.  VGA console is full of '?'.

Booting single user mode, I can provoke the panic with '/etc/rc.d/moused
start ums0'.

===

Fatal trap 12: page fault while in kernel mode

cpuid = 7;
apic id = 0e
Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x2c
cpuid = 6; fault code           = supervisor read data, page not present
apic id = 0c
instruction pointer     = 0x20:0xffffffff803abcf7
fault virtual address   = 0x2c
stack pointer           = 0x28:0xfffffe085f1b3880
fault code              = supervisor read data, page not present
frame pointer           = 0x28:0xfffffe085f1b38e0
instruction pointer     = 0x20:0xffffffff803ae562
code segment            = base 0x0, limit 0xfffff, type 0x1b
stack pointer           = 0x28:0xfffffe083c9b9950
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, frame pointer
        = 0x28:0xfffffe083c9b9a10
IOPL = 0
current process         = code segment          = base 0x0, limit
0xfffff, type 0x1b

The instruction pointer is Line 831 of "/usr/src/sys/dev/vt/vt_core.c".

Reverting /sys/dev/vt to r270269 would solve the panic, but I haven't
investigated further.

Cheers,