Gcc [gcc-8-branch revision 269736] failed to bootstrap on x86_64!

[H.J. Lu]

     hjl.tools@gmail.com gcc-regression@gcc.gnu.org hjl.tools@gmail.com < makelog.269736.8.x86_64.O3.mail; \
  exit 1; \
fi
make[2]: Entering directory '/export/gnu/import/git/gcc-test'
rm -rf bld
make[2]: *** [Makefile:449: clobber] Segmentation fault
make[2]: Leaving directory '/export/gnu/import/git/gcc-test'
    grep "Error " makelog.269736.8.x86_64.O3 >> makelog.269736.8.x86_64.O3.mail; \
make one SRC=src-8 GCC=gcc-8
make[1]: Entering directory '/export/gnu/import/git/gcc-test'
if make gcc; then \
  make check-gcc; \
else \
  if [ -n "makelog.269736.8.x86_64.O3" -a -e "makelog.269736.8.x86_64.O3" ]; then \
    head -26 makelog.269736.8.x86_64.O3 | tail -7 > makelog.269736.8.x86_64.O3.mail; \
    grep "Error " makelog.269736.8.x86_64.O3 >> makelog.269736.8.x86_64.O3.mail; \
    tail -100 makelog.269736.8.x86_64.O3 >> makelog.269736.8.x86_64.O3.mail; \
  else \
    echo " RUNTESTFLAGS="--target_board='unix{-m32,}'" ../src-8/configure  --prefix=/usr/8.3.1 --enable-clocale=gnu --with-system-zlib --enable-shared --enable-cet --with-demangler-in-ld --enable-libmpx --with-build-config='bootstrap-O3 bootstrap-debug' --disable-werror --with-fpmath=sse " > makelog.269736.8.x86_64.O3.mail; \
  fi; \
  Mail -s "Gcc `cat src-8/gcc/REVISION` failed to bootstrap on x86_64!" \
     hjl.tools@gmail.com gcc-regression@gcc.gnu.org hjl.tools@gmail.com < makelog.269736.8.x86_64.O3.mail; \
  exit 1; \
fi
make[2]: Entering directory '/export/gnu/import/git/gcc-test'
rm -rf bld
make[2]: *** [Makefile:449: clobber] Segmentation fault
make[2]: Leaving directory '/export/gnu/import/git/gcc-test'