Marcus,
Thanks for taking the time. It is possible I re-installed a
new version of VOLK. I'll try a fresh build and see what
that gets me.
I also should have mentioned that the filter works OK for a
while then segfaults. A couple of packets always pass through
the clock sync block I'm using before I get the segfault.
Finally, the segfault occurs in the polyphase clock sync
block, do you think I could have mis-configured the block in
some way that will get me this error? I think the PF clock
sync block is pretty popular so if there's a bug in that block
that's causing this I'd be surprised.