Random compiler errors on BETA1

Hi,

    I've successfuly upgraded one of the servers to BETA1. The stability is ok
    for now (after the patch from 6.0-CURRENT applied), but I get many random
    Signal 6 and abort traps from GCC. I don't get coredumps either althought I
    can make sleep dump core when killed with ABRT. 

    Trying to compile xorg libraries for example, I have:

cc -c -O -pipe  -ansi -pedantic -Wno-system-headers -Dasm=__asm         -Wall -Wpointer-arith -Wundef  -I/usr/ports
/x11/xorg-libraries/work/xc/exports/include             -I/usr/ports/x11/xorg-libraries/work/xc/exports/include/X11
                -I/usr/ports/x11/xorg-libraries/work/xc/include/extensions              -I/usr/ports/x11/xorg-libra
ries/work/xc/exports/include/GL                 -I/usr/ports/x11/xorg-libraries/work/xc/lib/GL/glx              -I/
usr/ports/x11/xorg-libraries/work/xc/extras/Mesa/src            -I/usr/ports/x11/xorg-libraries/work/xc/extras/Mesa
/src/X          -I/usr/ports/x11/xorg-libraries/work/xc/extras/Mesa/src/X86             -I/usr/ports/x11/xorg-libra
ries/work/xc/extras/Mesa/include                -I/usr/ports/x11/xorg-libraries/work/xc/lib/GL/include          -I/
usr/ports/x11/xorg-libraries/work/xc/lib/GL/dri  -I/usr/ports/x11/xorg-libraries/work/xc -I/usr/ports/x11/xorg-libr
aries/work/xc/exports/include  -I/usr/X11R6/include -DCSRG_BASED  -DFUNCPROTO=15 -DNARROWPROTO -DXTHREADS   -DXUSE_
MTSAFE_API    -DGLXEXT -DXF86DRI -DGLX_DIRECT_RENDERING -DGLX_USE_DLOPEN -DGLX_USE_MESA  -DXF86VIDMODE -DUSE_X86_AS
M    -DXVENDORNAME='"The X.Org Foundation"' -DXVENDORNAMESHORT='"X.Org"'    -fPIC pixel.c
*** Signal 6

Stop in /usr/ports/x11/xorg-libraries/work/xc/lib/GL/glx.
*** Error code 1

Stop in /usr/ports/x11/xorg-libraries/work/xc/lib/GL.
*** Error code 1

Stop in /usr/ports/x11/xorg-libraries/work/xc/lib.
*** Error code 1


    I don't see any corelation between the errors. Has anyone noticed something
    similar?

/S