can't build firefox on 5.2.1-RELEASE-p9

[h]

c++ -o nsDeviceContextGTK.o -c -DNATIVE_THEME_SUPPORT -DOSTYPE=\"FreeBSD5.2\" 
-DOSARCH=\"FreeBSD\" -DUSE_POSTSCRIPT -DUSE_XPRINT -DUSE_MOZILLA_TYPES 
-I../.. -I./. -I./.. -I./../shared -I./../freetype -I./../x11shared 
-I/usr/X11R6/include -I/usr/local/include/freetype2 -I/usr/local/include    
-I../../../dist/include/xpcom -I../../../dist/include/string 
-I../../../dist/include/widget -I../../../dist/include/view 
-I../../../dist/include/util -I../../../dist/include/pref 
-I../../../dist/include/uconv -I../../../dist/include/unicharutil 
-I../../../dist/include/locale -I../../../dist/include/necko 
-I../../../dist/include/content -I../../../dist/include/dom 
-I../../../dist/include/layout -I../../../dist/include/imglib2 
-I../../../dist/include/xprintutil -I../../../dist/include/gfx 
-I../../../dist/include 
-I/usr/ports/www/firefox/work/mozilla/dist/include/nspr  -I/usr/local/include 
-I/usr/local/include  -I/usr/local/include/freetype2 -I/usr/local/include 
-I/usr/X11R6/include   -fPIC  -I/usr/X11R6/include -I/usr/local/include  
-I/usr/X11R6/include  -I/usr/X11R6/include -fno-rtti -fno-exceptions -Wall 
-Wconversion -Wpointer-arith -Wcast-align -Woverloaded-virtual -Wsynth 
-Wno-ctor-dtor-privacy -Wno-non-virtual-dtor -Wno-long-long -O -pipe 
-mcpu=pentiumpro -O2 -D_THREAD_SAFE -fshort-wchar -pipe  -DNDEBUG -DTRIMMED 
-O2  -I/usr/local/include/atk-1.0 -I/usr/local/include/glib-2.0 
-I/usr/local/lib/glib-2.0/include -I/usr/X11R6/include/gtk-2.0 
-I/usr/X11R6/lib/gtk-2.0/include -I/usr/X11R6/include 
-I/usr/X11R6/include/pango-1.0 -I/usr/local/include/freetype2 
-I/usr/local/include    -I/usr/X11R6/include -I/usr/local/include  
-I/usr/X11R6/include  -I/usr/X11R6/include -DMOZILLA_CLIENT 
-include ../../../mozilla-config.h nsDeviceContextGTK.cpp
nsDeviceContextGTK.cpp:602: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
gmake[4]: *** [nsDeviceContextGTK.o] Error 1
gmake[4]: Leaving directory `/usr/ports/www/firefox/work/mozilla/gfx/src/gtk'
gmake[3]: *** [libs] Error 2
gmake[3]: Leaving directory `/usr/ports/www/firefox/work/mozilla/gfx/src'
gmake[2]: *** [libs] Error 2
gmake[2]: Leaving directory `/usr/ports/www/firefox/work/mozilla/gfx'
gmake[1]: *** [tier_9] Error 2
gmake[1]: Leaving directory `/usr/ports/www/firefox/work/mozilla'
gmake: *** [default] Error 2
*** Error code 2

Stop in /usr/ports/www/firefox.