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From: Pedro Almeida <mindcooker@gmail.com>
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Subject: panic: free: guard1 fail @ 0x6c23c 
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I upgraded my system from 6.2 to 7.0 using cvsup.
I'm using ULE and device polling. After doing make installworld and 
reboot, the system
don't boot anymore. I have some variables in make.conf, but I don't know 
if this the cause of the problem.
CPUTYPE?=p3
CFLAGS= -O2 -pipe -funroll-loops -ffast-math
COPTFLAGS= -O2 -pipe -funroll-loops -ffast-math
Any ideas of how to fix this? Thanks a lot


Can't work out which disk we are booting from.
Guessed BIOS device 0xffffffff not found by probes, defaulting to disk0:
panic: free: guard1 fail @ 0x6c23c
from /usr/src/sys/boot/i386/loader/../../common/module.c:959
press any key to reboot