panic after starting X with r238120

Hi,

After updating to r238120, I get a panic whenever X starts up. It works for a few seconds, then panics. The messages don't look too useful to me, but here they are:

Unread portion of the kernel message buffer:
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 3610 (kdm_greet)
trap number             = 12
panic: page fault
cpuid = 0

(kgdb) bt
#0  doadump (textdump=dwarf2_read_address: Corrupted DWARF expression.
) at pcpu.h:224
#1  0xffffffff8087ef79 in kern_reboot (howto=dwarf2_read_address: Corrupted DWARF expression.
) at kern_shutdown.c:449
#2  0xffffffff8087f413 in panic (fmt=dwarf2_read_address: Corrupted DWARF expression.
) at kern_shutdown.c:637
#3  0xffffffff80b77d08 in trap_fatal (frame=dwarf2_read_address: Corrupted DWARF expression.
) at trap.c:852
#4  0xffffffff80b78012 in trap_pfault (frame=dwarf2_read_address: Corrupted DWARF expression.
) at trap.c:678
#5  0xffffffff80b777aa in trap (frame=Variable "frame" is not available.
) at trap.c:456
#6  0xffffffff80b62142 in calltrap () at /tmp/exception-vH8hmc.s:179
#7  0xffffffff80b6f6b0 in pmap_enter (pmap=dwarf2_read_address: Corrupted DWARF expression.
) at pmap.c:3587
#8  0xffffffff80adafa0 in vm_fault_hold (map=dwarf2_read_address: Corrupted DWARF expression.
) at vm_fault.c:935
#9  0xffffffff80ad9787 in vm_fault (map=Variable "map" is not available.
) at vm_fault.c:229
#10 0xffffffff80b77f26 in trap_pfault (frame=dwarf2_read_address: Corrupted DWARF expression.
) at trap.c:736
#11 0xffffffff80b77670 in trap (frame=Variable "frame" is not available.
) at trap.c:358
#12 0xffffffff80b62142 in calltrap () at /tmp/exception-vH8hmc.s:179
#13 0x00000008040d7796 in ?? ()
Previous frame inner to this frame (corrupt stack?)
Current language:  auto; currently minimal
(kgdb) 

Something I saw in a previous panic made me think this was drm related, but I don't see it in this particular one.

Steve