gcc 4.8.4 code generation issue

Hi,

If anyone who knows gcc well would like an example of a code generation 
problem, take a look at BIND in pkgsrc:

net/bind910/work/bind-9.10.1-P1/lib/dns/gen.c

Compiling with -O2 creates a binary that dumps core:

./gen -s . -t > include/dns/enumtype.h
[1]   Segmentation fault (core dumped) ./gen -s . -t >i...
*** Error code 139

If I change -O2 to -O, it works:

making all in /usr/pkgsrc/net/bind910/work/bind-9.10.1-P1/lib/dns
gcc -O -fno-reorder-blocks -I/usr/include -I../../lib/isc/include 
-I/usr/include -L/usr/lib -Wl,-rpath,/usr/lib -Wl,-R/usr/lib 
-Wl,-R/usr/local/lib -o gen ./gen.c

(works)

Thanks,
John