vorbis/lib/envelope.c causes gcc internal error

When using gcc 2.95.3 on i686-pc-linux-gnu, vorbis/lib/envelope.c causes gcc to
emit:
"gcc:Internal compiler error: program cc1 got fatal signal 11"

This error is present in rc1, rc2 and current cvs sources.  
The full command used in compile is:

/usr/bin/gcc -DPACKAGE=\"libvorbis\" -DVERSION=\"1.0rc2\" -DHAVE_DLFCN_H=1
-DHAVE_ALLOCA_H=1 -DHAVE_ALLOCA=1 -DHAVE_SQRTF=1 -DHAVE_LOGF=1 -DHAVE_EXPF=1
-DHAVE_ACOSF=1 -DHAVE_ATANF=1 -DHAVE_FREXPF=1 -DHAVE_RINTF=1 -I. -I.
-I../include -O20 -ffast-math -mno-ieee-pf -D_REENTRANT -fsigned-char
-march=i686 -O3 -DUSE_MEMORY_H -c envelope.c -Wp,-MD,.deps/envelope.TPlo  -fPIC
-DPIC -o .libs/envelope.lo