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Reading symbols from /usr/bin/qtox...expanding to full symbols...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/bin/qtox 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffd29f8700 (LWP 19047)]
[New Thread 0x7fffcab5c700 (LWP 19048)]
[New Thread 0x7fffca1ad700 (LWP 19050)]
[04:03:06.256 UTC] persistence/settings.cpp:133 : Debug: "Loading settings from /home/horo/.config/tox/qtox.ini"
[04:03:06.283 UTC] widget/translator.cpp:52 : Debug: Loaded translation "zh_CN"
[04:03:06.283 UTC] widget/translator.cpp:60 : Debug: System translation loaded "zh_CN"
[04:03:06.283 UTC] ipc.cpp:62 : Debug: Our global IPC ID is  275216169739273613
[04:03:06.283 UTC] ipc.cpp:74 : Debug: Attaching to the global shared memory
[04:03:06.283 UTC] ipc.cpp:248 : Debug: Previous owner timed out, taking ownership 6553150149854472620 -> 275216169739273613
[04:03:06.283 UTC] main.cpp:218 : Debug: built on:  11:59:32 May  8 2017 ( 1494215723 )
[04:03:06.284 UTC] main.cpp:219 : Debug: commit:  496f854897566a8ab1bda8449de4b2a71307d3d5 

[04:03:06.284 UTC] nexus.cpp:90 : Debug: Starting up
[04:03:08.515 UTC] persistence/profile.cpp:99 : Debug: Loading tox save  "/home/horo/.config/tox/utox_save.tox"
[04:03:08.516 UTC] persistence/settings.cpp:453 : Debug: "Saving global settings at /home/horo/.config/tox/qtox.ini"
[04:03:08.541 UTC] persistence/settings.cpp:327 : Debug: Loading personal settings from "/home/horo/.config/tox/utox_save.ini"
[04:03:08.542 UTC] widget/translator.cpp:52 : Debug: Loaded translation "zh_CN"
[04:03:08.543 UTC] widget/translator.cpp:60 : Debug: System translation loaded "zh_CN"
[New Thread 0x7fffb9edf700 (LWP 19052)]
[04:03:08.780 UTC] core/core.cpp:265 : Debug: Loading user profile
[04:03:08.780 UTC] core/core.cpp:129 : Debug: Core starting with IPv6 enabled
[New Thread 0x7fffb96de700 (LWP 19053)]
[New Thread 0x7fffb8edd700 (LWP 19054)]
[04:03:09.537 UTC] widget/systemtrayicon.cpp:61 : Debug: Using GTK backend
[04:03:10.610 UTC] core/core.cpp:414 : Debug: "Connecting to 195.93.190.6:33445 (strngr)"
[04:03:10.611 UTC] core/core.cpp:421 : Debug: "Error bootstrapping from strngr"
[04:03:10.611 UTC] core/core.cpp:425 : Debug: "Error adding TCP relay from strngr"
[04:03:10.611 UTC] core/core.cpp:414 : Debug: "Connecting to 2a01:d0:ffff:a8a::2:33445 (strngr)"
[04:03:10.611 UTC] core/core.cpp:421 : Debug: "Error bootstrapping from strngr"
[04:03:10.611 UTC] core/core.cpp:425 : Debug: "Error adding TCP relay from strngr"

Thread 1 "qtox" received signal SIGSEGV, Segmentation fault.
0x00007ffff1580356 in QPainter::end() () from /usr/lib/libQt5Gui.so.5