.
Thread 3 (Thread 0x7f5bfcb25700 (LWP 27716)):
#0  0x00007f5bffad2b03 in poll () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007f5c00216ff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f5c0021745a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f5bff766326 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#4  0x00007f5c002389b5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f5c00b33e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007f5bffade4bd in clone () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#7  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 0x7f5bfd326700 (LWP 27715)):
#0  0x00007f5bffad2b03 in poll () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007f5c00216ff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f5c00217124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f5c00217171 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f5c002389b5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f5c00b33e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007f5bffade4bd in clone () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#7  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 0x7f5c01ada7c0 (LWP 27714)):
#0  0x00007f5c009200b6 in libusb_exit () from /lib/x86_64-linux-gnu/libusb-1.0.so.0
No symbol table info available.
#1  0x0000000000415a9d in ?? ()
No symbol table info available.
#2  0x00007f5c004d8e73 in g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#3  0x0000000000411922 in ?? ()
No symbol table info available.
#4  0x000000000041219b in ?? ()
No symbol table info available.
#5  0x0000000000408cef in ?? ()
No symbol table info available.
#6  0x0000000000406c86 in ?? ()
No symbol table info available.
#7  0x00007f5bffa0d76d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#8  0x0000000000406e01 in ?? ()
No symbol table info available.
#9  0x00007fff48a50148 in ?? ()
No symbol table info available.
#10 0x000000000000001c in ?? ()
No symbol table info available.
#11 0x0000000000000001 in ?? ()
No symbol table info available.
#12 0x00007fff48a508e5 in ?? ()
No symbol table info available.
#13 0x0000000000000000 in ?? ()
No symbol table info available.