Hello Vasil,
I hope this is what you meant:
niklas@niklas~$ gdb --ex run --args python $(which gnuradio-companion)
GNU gdb (Ubuntu 9.2-0ubuntu1~20.04.1) 9.2
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Reading symbols from python...
(No debugging symbols found in python)
Starting program: /usr/bin/python /usr/bin/gnuradio-companion
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff649c700 (LWP 7650)]
[New Thread 0x7ffff5c9b700 (LWP 7651)]
[New Thread 0x7ffff549a700 (LWP 7652)]
[New Thread 0x7ffff4c99700 (LWP 7653)]
[New Thread 0x7ffff4498700 (LWP 7654)]
[New Thread 0x7ffff3c97700 (LWP 7655)]
[New Thread 0x7ffff3496700 (LWP 7656)]
[New Thread 0x7ffff2c95700 (LWP 7657)]
[New Thread 0x7ffff2494700 (LWP 7658)]
[New Thread 0x7ffff1c93700 (LWP 7659)]
[Detaching after fork from child process 7660]
[New Thread 0x7fffed2da700 (LWP 7663)]
[New Thread 0x7fffecad9700 (LWP 7664)]
[New Thread 0x7fffe7dff700 (LWP 7665)]
[Detaching after fork from child process 7666]
>>> Warning: vocoder_codec2_decode_ps - option_attributes are for enums only, ignoring
>>> Warning: vocoder_codec2_encode_sp - option_attributes are for enums only, ignoring
[New Thread 0x7fffdbfff700 (LWP 7678)]
[New Thread 0x7fffdb7fe700 (LWP 7679)]
<<< Welcome to GNU Radio Companion 3.10.5.0 >>>
Block paths:
/home/niklas/.grc_gnuradio
/usr/share/gnuradio/grc/blocks
/usr/local/share/gnuradio/grc/blocks
Loading: "/home/niklas/Workspace/Niklas_flowgraphs/Transceiver_Station_1.grc"
[Thread 0x7fffdbfff700 (LWP 7678) exited]
[Detaching after fork from child process 7681]
--Type <RET> for more, q to quit, c to continue without paging--RET
Thread 1 "python" received signal SIGSEGV, Segmentation fault.
0x00007fffc9d1340b in ?? ()
from /usr/lib/python3/dist-packages/gnuradio/digital/digital_python.cpython-38-x86_64-linux-gnu.so
(gdb) backtrace
#0 0x00007fffc9d1340b in ()
at /usr/lib/python3/dist-packages/gnuradio/digital/digital_python.cpython-38-x86_64-linux-gnu.so
#1 0x00007fffc9d94a02 in ()
at /usr/lib/python3/dist-packages/gnuradio/digital/digital_python.cpython-38-x86_64-linux-gnu.so
#2 0x00000000005f5b39 in PyCFunction_Call ()
#3 0x00000000005f6706 in _PyObject_MakeTpCall ()
#4 0x000000000050ba83 in ()
#5 0x0000000000570b82 in _PyEval_EvalFrameDefault ()
#6 0x0000000000569d8a in _PyEval_EvalCodeWithName ()
#7 0x000000000068e267 in PyEval_EvalCode ()
#8 0x000000000067d9b1 in ()
#9 0x000000000067da2f in ()
#10 0x000000000067dc1f in PyRun_StringFlags ()
#11 0x000000000060091e in ()
#12 0x00000000005c4790 in ()
#13 0x000000000056bab6 in _PyEval_EvalFrameDefault ()
#14 0x0000000000569d8a in _PyEval_EvalCodeWithName ()
#15 0x00000000005f60c3 in _PyFunction_Vectorcall ()
#16 0x000000000056bbe1 in _PyEval_EvalFrameDefault ()
#17 0x00000000005f5ee6 in _PyFunction_Vectorcall ()
#18 0x000000000056bbe1 in _PyEval_EvalFrameDefault ()
Thank you for helping