At the moment it's easily reproducible. Same app runs under GR v3.3 with no trouble. Let me know if I can provide any more info - in particular, perhaps there's a special GDB command to dump the "xmm" register set?
Best Regards
Max
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(gdb) i stack
#0 0x0747ce98 in volk_32f_s32f_multiply_32f_a_sse ()
from /usr/local/lib/libvolk.so.0.0.0
#1 0x0191cd84 in gr_multiply_const_ff::work(int, std::vector<void const*, std::allocator<void const*> >&, std::vector<void*, std::allocator<void*> >&) ()
from /usr/local/lib/libgnuradio-core-3.6.1.so.0.0.0
#2 0x018afb57 in gr_sync_block::general_work(int, std::vector<int, std::allocator<int> >&, std::vector<void const*, std::allocator<void const*> >&, std::vector<void*, std::allocator<void*> >&) ()
from /usr/local/lib/libgnuradio-core-3.6.1.so.0.0.0
#3 0x01890bb5 in gr_block_executor::run_one_iteration() ()
from /usr/local/lib/libgnuradio-core-3.6.1.so.0.0.0
#4 0x018b2780 in gr_tpb_thread_body::gr_tpb_thread_body(boost::shared_ptr<gr_block>, int) () from /usr/local/lib/libgnuradio-core-3.6.1.so.0.0.0
#5 0x018abe36 in boost::detail::function::void_function_obj_invoker0<gruel::thread_body_wrapper<tpb_container>, void>::invoke(boost::detail::function::function_buffer&) () from /usr/local/lib/libgnuradio-core-3.6.1.so.0.0.0
#6 0x0466c732 in boost::detail::thread_data<boost::function0<void> >::run() ()
from /usr/local/lib/libgruel-3.6.1.so.0.0.0
#7 0x07fde029 in thread_proxy () from /usr/lib/libboost_thread.so.1.42.0
#8 0x00c26e99 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#9 0x005f673e in clone () from /lib/i386-linux-gnu/libc.so.6
(gdb) x/10ib 0x0747ce98
=> 0x747ce98 <volk_32f_s32f_multiply_32f_a_sse+56>:
movaps (%ecx,%esi,1),%xmm0
0x747ce9c <volk_32f_s32f_multiply_32f_a_sse+60>: add $0x1,%edi
0x747ce9f <volk_32f_s32f_multiply_32f_a_sse+63>: mulps %xmm1,%xmm0
0x747cea2 <volk_32f_s32f_multiply_32f_a_sse+66>:
movaps %xmm0,(%eax,%esi,1)
0x747cea6 <volk_32f_s32f_multiply_32f_a_sse+70>: add $0x10,%esi
0x747cea9 <volk_32f_s32f_multiply_32f_a_sse+73>: cmp %edi,%edx
0x747ceab <volk_32f_s32f_multiply_32f_a_sse+75>:
ja 0x747ce98 <volk_32f_s32f_multiply_32f_a_sse+56>
0x747cead <volk_32f_s32f_multiply_32f_a_sse+77>: mov %edx,%edi
0x747ceaf <volk_32f_s32f_multiply_32f_a_sse+79>: shl $0x4,%edi
0x747ceb2 <volk_32f_s32f_multiply_32f_a_sse+82>: add %edi,%ecx
(gdb) i r
eax 0xb1974c08 -1315484664
ecx 0xb190ec08 -1315902456
edx 0xaf 175
ebx 0x19d9ff4 27107316
esp 0xaf00efe4 0xaf00efe4
ebp 0xaf00f008 0xaf00f008
esi 0x0 0
edi 0x0 0
eip 0x747ce98 0x747ce98 <volk_32f_s32f_multiply_32f_a_sse+56>
eflags 0x210246 [ PF ZF IF RF ID ]
cs 0x73 115
ss 0x7b 123
ds 0x7b 123
es 0x7b 123
fs 0x0 0
gs 0x33 51