make buildworld causes "internal compiler error"

Why might this be happening???? I updated all the ports from source 
yesterday. That worked fine. Now I'm trying to go to beta 5 but after a 
long time
compiling I get this message. I'm now running 6.0 beta 4 and as far as I 
know there are no problems except this.

Bob




c++ -O2 -fno-strict-aliasing -pipe -DIN_GLIBCPP_V3 -DHAVE_CONFIG_H 
-I/usr/src/gnu/lib/libstdc++ -I/usr/src/gnu/lib/libstdc++/../
../../contrib/libstdc++/libsupc++ 
-I/usr/src/gnu/lib/libstdc++/../../../contrib/gcc 
-I/usr/src/gnu/lib/libstdc++/../../../contri
b/libstdc++/include -frandom-seed=RepeatabilityConsideredGood 
-fno-implicit-templates -ffunction-sections -fdata-sections  -Wno-
deprecated -c 
/usr/src/gnu/lib/libstdc++/../../../contrib/libstdc++/src/io-inst.cc
In file included from /usr/obj/usr/src/tmp/usr/include/c++/3.4/string:57,
                 from 
/usr/src/gnu/lib/libstdc++/../../../contrib/libstdc++/include/bits/locale_classes.h:47,
                 from 
/usr/src/gnu/lib/libstdc++/../../../contrib/libstdc++/include/bits/ios_base.h:47,
                 from /usr/obj/usr/src/tmp/usr/include/c++/3.4/ios:49,
                 from 
/usr/src/gnu/lib/libstdc++/../../../contrib/libstdc++/src/io-inst.cc:35:
/usr/src/gnu/lib/libstdc++/../../../contrib/libstdc++/include/bits/basic_string.tcc:236: 
internal compiler error: Segmentation f
ault: 11
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
*** Error code 1
 
Stop in /usr/src/gnu/lib/libstdc++.
*** Error code 1
 
Stop in /usr/src/gnu/lib.
*** Error code 1
 
Stop in /usr/src.
*** Error code 1
 
Stop in /usr/src.
*** Error code 1
 
Stop in /usr/src.
*** Error code 1
 
Stop in /usr/src.