Segmentation fault

[Shakhbozboy]

python3 main.py
PORT: /dev/ttyACM0
##/dev/ttyACM0##
Segmentation fault (core dumped)

why i am having that error message

[Shakhbozboy]

(gdb) run main.py
Starting program: /usr/bin/python3 main.py
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
PORT: /dev/ttyACM0
##/dev/ttyACM0##

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff668cd91 in ssp6_sync (sspC=0x55c983f0) at ssp_helpers.c:91
91 ssp_helpers.c: No such file or directory.
(gdb)