core dumped on smurf-srv-SO3 when trying to stream after overnight tests.

[jlashner]

core dump: smurf-srv-SO3:/data/cores/core_1665764848_python3_8900_20018_1001_1000

[New LWP 190]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `python3 -u /usr/local/src/smurf-streamer/scripts/stream.py -S shm-smrf-sp02 -N'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f26adb3838b in SmurfBuilder::FrameFromSamples(std::_Deque_iterator<boost::shared_ptr<SmurfSample const>, boost::shared_ptr<SmurfSample const>&, boost::shared_ptr<SmurfSample const>*>, std::_Deque_iterator<boost::shared_ptr<SmurfSample const>, boost::shared_ptr<SmurfSample const>&, boost::shared_ptr<SmurfSample const>*>) ()
   from /usr/local/src/smurf-streamer/lib/sosmurfcore.so
[Current thread is 1 (Thread 0x7f260352d700 (LWP 165))]
(gdb) bt
#0  0x00007f26adb3838b in SmurfBuilder::FrameFromSamples(std::_Deque_iterator<boost::shared_ptr<SmurfSample const>, boost::shared_ptr<SmurfSample const>&, boost::shared_ptr<SmurfSample const>*>, std::_Deque_iterator<boost::shared_ptr<SmurfSample const>, boost::shared_ptr<SmurfSample const>&, boost::shared_ptr<SmurfSample const>*>) ()
   from /usr/local/src/smurf-streamer/lib/sosmurfcore.so
#1  0x00007f26adb399f3 in SmurfBuilder::FlushStash() () from /usr/local/src/smurf-streamer/lib/sosmurfcore.so
#2  0x00007f26adb39e9d in SmurfBuilder::ProcessStashThread(SmurfBuilder*) () from /usr/local/src/smurf-streamer/lib/sosmurfcore.so
#3  0x00007f26d39266ef in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#4  0x00007f26d6c9f6db in start_thread (arg=0x7f260352d700) at pthread_create.c:463
#5  0x00007f26d6fd888f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95