Re: Weird Python Sinks Crash with GNU Radio 3.8.1

[Volker Schroer]

Tested on Ubuntu 19.10 with python 3.7.5

Crashing.

Backtrace gives

Thread 3 "my_null_sink4" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffe8939700 (LWP 7033)]
0x00007ffff265bed1 in gr::py_feval_ll::calleval(long) () from
/usr/local/gnuradio/lib/python3/dist-packages/gnuradio/gr/_runtime_swig.so
(gdb) bt
#0  0x00007ffff265bed1 in gr::py_feval_ll::calleval(long) () from
/usr/local/gnuradio/lib/python3/dist-packages/gnuradio/gr/_runtime_swig.so
#1  0x00007ffff6caf2ea in gr::block_gateway_impl::work(int,
std::vector<void const*, std::allocator<void const*> >&,
std::vector<void*, std::allocator<void*> >&) ()
   from /usr/local/gnuradio/lib/libgnuradio-runtime.so.3.9.0
#2  0x00007ffff6caf423 in gr::block_gateway_impl::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/gnuradio/lib/libgnuradio-runtime.so.3.9.0
#3  0x00007ffff6cad1a3 in gr::block_executor::run_one_iteration() ()
from /usr/local/gnuradio/lib/libgnuradio-runtime.so.3.9.0
#4  0x00007ffff6d03093 in
gr::tpb_thread_body::tpb_thread_body(boost::shared_ptr<gr::block>,
boost::shared_ptr<boost::barrier>, int) () from
/usr/local/gnuradio/lib/libgnuradio-runtime.so.3.9.0
#5  0x00007ffff6cf498e in
boost::detail::function::void_function_obj_invoker0<gr::thread::thread_body_wrapper<gr::tpb_container>,
void>::invoke(boost::detail::function::function_buffer&) ()
   from /usr/local/gnuradio/lib/libgnuradio-runtime.so.3.9.0
#6  0x00007ffff6d105c6 in
boost::detail::thread_data<boost::function0<void> >::run() () from
/usr/local/gnuradio/lib/libgnuradio-runtime.so.3.9.0
#7  0x00007ffff71f61b5 in ?? () from
/usr/lib/x86_64-linux-gnu/libboost_thread.so.1.67.0
#8  0x00007ffff7d9c669 in start_thread (arg=<optimized out>) at
pthread_create.c:479
#9  0x00007ffff7ed8323 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95


By the way: trying the gnuradio version with pybind instead of swig
crashes too.

-- Volker