Kernel trap on linux compat load

[Eric Millbrandt]

I've noticed that linux compatibility caused my system to crash since I 
upgraded from RELENG_4_9 (RELENG_4_10, RELENG_4_11, RELENG_4).  I 
upgraded using buildworld, I haven't had a change to test using a clean 
binary install.  Has anyone else seen this behavior?  It's easy to 
reproduce, the system traps right on linux compatibility load.  The only 
similar behavior I've found on google is an unanswered post 
http://lists.freebsd.org/pipermail/freebsd-alpha/2004-June/001555.html

Jun  8 07:18:17 mongoloid /kernel: fatal kernel trap:
Jun  8 07:18:17 mongoloid /kernel:
Jun  8 07:18:17 mongoloid /kernel: trap entry = 0x4 (unaligned access fault)
Jun  8 07:18:17 mongoloid /kernel: a0         = 0xfffffe0015285e34
Jun  8 07:18:17 mongoloid /kernel: a1         = 0x2d
Jun  8 07:18:17 mongoloid /kernel: a2         = 0x1
Jun  8 07:18:17 mongoloid /kernel: pc         = 0xfffffc0000386e68
Jun  8 07:18:17 mongoloid /kernel: ra         = 0xfffffc0000386dd8
Jun  8 07:18:17 mongoloid /kernel: curproc    = 0xfffffe001177e780
Jun  8 07:18:17 mongoloid /kernel: pid = 173, comm = ldconfig
Jun  8 07:18:17 mongoloid /kernel:
Jun  8 07:18:17 mongoloid /kernel: panic: trap

EEM
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