ralfg@vm1:~/Projekte/GNU Radio$ gdb -ex run --args /usr/bin/python3 test.py GNU gdb (Ubuntu 9.2-0ubuntu1~20.04) 9.2 Copyright (C) 2020 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/bin/python3... (No debugging symbols found in /usr/bin/python3) Starting program: /usr/bin/python3 test.py [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7ffff00ce700 (LWP 1894)] [New Thread 0x7fffef8cd700 (LWP 1895)] [New Thread 0x7fffef0cc700 (LWP 1896)] [New Thread 0x7fffee8cb700 (LWP 1897)] [New Thread 0x7fffee0ca700 (LWP 1898)] [New Thread 0x7fffed8c9700 (LWP 1899)] [New Thread 0x7fffed0c8700 (LWP 1900)] [New Thread 0x7fffec8c7700 (LWP 1901)] [New Thread 0x7fffec0c6700 (LWP 1902)] [New Thread 0x7fffeb8c5700 (LWP 1903)] [New Thread 0x7fffe35a4700 (LWP 1904)] qt5ct: using qt5ct plugin [New Thread 0x7fffe1b0f700 (LWP 1905)] gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.8.3.1 built-in source types: file rtl rtl_tcp rfspace redpitaya [New Thread 0x7fffe12bc700 (LWP 1906)] [Thread 0x7fffe12bc700 (LWP 1906) exited] [New Thread 0x7fffe12bc700 (LWP 1907)] [Thread 0x7fffe12bc700 (LWP 1907) exited] [New Thread 0x7fffe12bc700 (LWP 1908)] Using device #[Thread 0x7fffe12bc700 (LWP 1908) exited] 0[New Thread 0x7fffe12bc700 (LWP 1909)] [Thread 0x7fffe12bc700 (LWP 1909) exited] Realtek RTL2838UHIDIR SN: 00000001 [New Thread 0x7fffe12bc700 (LWP 1910)] Detached kernel driver Found Rafael Micro R820T tuner Setting rtl clock to 28800000 Hz. Setting tuner clock to 28800000 Hz. [R82XX] PLL not locked! Exact sample rate is: 1142857,021756 Hz [R82XX] PLL not locked! gr::buffer::allocate_buffer: warning: tried to allocate 43 items of size 1512. Due to alignment requirements 512 were allocated. If this isn't OK, consider padding your structure to a power-of-two bytes. On this platform, our allocation granularity is 4096 bytes. gr::buffer::allocate_buffer: warning: tried to allocate 43 items of size 1512. Due to alignment requirements 512 were allocated. If this isn't OK, consider padding your structure to a power-of-two bytes. On this platform, our allocation granularity is 4096 bytes. gr::buffer::allocate_buffer: warning: tried to allocate 5 items of size 12096. Due to alignment requirements 64 were allocated. If this isn't OK, consider padding your structure to a power-of-two bytes. On this platform, our allocation granularity is 4096 bytes. gr::buffer::allocate_buffer: warning: tried to allocate 4 items of size 13640. Due to alignment requirements 512 were allocated. If this isn't OK, consider padding your structure to a power-of-two bytes. On this platform, our allocation granularity is 4096 bytes. gr::buffer::allocate_buffer: warning: tried to allocate 4 items of size 13640. Due to alignment requirements 512 were allocated. If this isn't OK, consider padding your structure to a power-of-two bytes. On this platform, our allocation granularity is 4096 bytes. [New Thread 0x7fffda557700 (LWP 1916)] [New Thread 0x7fffd9d56700 (LWP 1917)] [New Thread 0x7fffd9555700 (LWP 1918)] [New Thread 0x7fffd8d54700 (LWP 1919)] Allocating 15 zero-copy buffers [New Thread 0x7fffc7fff700 (LWP 1920)] [New Thread 0x7fffc77fe700 (LWP 1921)] [New Thread 0x7fffc6ffd700 (LWP 1922)] [New Thread 0x7fffc67fc700 (LWP 1923)] [New Thread 0x7fffc5ffb700 (LWP 1924)] [New Thread 0x7fffc57fa700 (LWP 1925)] [New Thread 0x7fffc4ff9700 (LWP 1926)] [New Thread 0x7fffa7fff700 (LWP 1927)] Thread 27 "dvbt_symbol_inn" received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fffc5ffb700 (LWP 1924)] 0x00007fffe61a2e0d in ?? () from /lib/x86_64-linux-gnu/libgnuradio-dtv.so.3.8.3 (gdb) bt #0 0x00007fffe61a2e0d in () at /lib/x86_64-linux-gnu/libgnuradio-dtv.so.3.8.3 #1 0x00007ffff0f40d13 in gr::block_executor::run_one_iteration() () at /lib/x86_64-linux-gnu/libgnuradio-runtime.so.3.8.3 #2 0x00007ffff0f95eaa in gr::tpb_thread_body::tpb_thread_body(boost::shared_ptr, boost::shared_ptr, int) () at /lib/x86_64-linux-gnu/libgnuradio-runtime.so.3.8.3 #3 0x00007ffff0f84928 in () at /lib/x86_64-linux-gnu/libgnuradio-runtime.so.3.8.3 #4 0x00007ffff0fa4df8 in () at /lib/x86_64-linux-gnu/libgnuradio-runtime.so.3.8.3 #5 0x00007ffff087343b in () at /lib/x86_64-linux-gnu/libboost_thread.so.1.71.0 #6 0x00007ffff7da2609 in start_thread (arg=) at pthread_create.c:477 #7 0x00007ffff7ede293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 (gdb)