.
Thread 4 (Thread 0x7fd782278700 (LWP 5403)):
#0  0x00007fd78989083d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007fd7878a733c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007fd7878a76c2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007fd7871ad816 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#4  0x00007fd7878cdb95 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007fd789b6666a in start_thread (arg=0x7fd782278700) at pthread_create.c:333
        __res = <optimised out>
        pd = 0x7fd782278700
        now = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140563578324736, 7670969430023984000, 0, 140563595107263, 140563578325440, 140563475154080, -7648301550393764992, -7648289327160503424}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
        pagesize_m1 = <optimised out>
        sp = <optimised out>
        freesize = <optimised out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007fd78989be4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.
.
Thread 3 (Thread 0x7fd78327a700 (LWP 5401)):
#0  0x00007fd78989083d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007fd7878a733c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007fd7878a744c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007fd78328228d in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
No symbol table info available.
#4  0x00007fd7878cdb95 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007fd789b6666a in start_thread (arg=0x7fd78327a700) at pthread_create.c:333
        __res = <optimised out>
        pd = 0x7fd78327a700
        now = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140563595110144, 7670969430023984000, 0, 140734100100111, 140563595110848, 30047088, -7648303750490762368, -7648289327160503424}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
        pagesize_m1 = <optimised out>
        sp = <optimised out>
        freesize = <optimised out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007fd78989be4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.
.
Thread 2 (Thread 0x7fd782a79700 (LWP 5402)):
#0  0x00007fd78989083d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007fd7878a733c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007fd7878a744c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007fd7878a7489 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007fd7878cdb95 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007fd789b6666a in start_thread (arg=0x7fd782a79700) at pthread_create.c:333
        __res = <optimised out>
        pd = 0x7fd782a79700
        now = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140563586717440, 7670969430023984000, 0, 140563595106911, 140563586718144, 0, -7648300452492749952, -7648289327160503424}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
        pagesize_m1 = <optimised out>
        sp = <optimised out>
        freesize = <optimised out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007fd78989be4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.
.
Thread 1 (Thread 0x7fd789f6f700 (LWP 5375)):
#0  0x00007fd7897ca227 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
        resultvar = 0
        pid = 5375
        selftid = 5375
#1  0x00007fd7897cbe8a in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x559b60, sa_sigaction = 0x559b60}, sa_mask = {__val = {140563650148667, 27551040, 5832366, 30117304, 8281820593059542272, 16, 0, 140563650120584, 8281820593059542272, 2, 140734100100768, 8, 5328433, 67, 140563650148664, 18446603339609450849}}, sa_flags = 906712735, sa_restorer = 0x0}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007fd78980dbb3 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7fd789926128 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
        ap = {{gp_offset = 40, fp_offset = 0, overflow_arg_area = 0x7fff360b58f0, reg_save_area = 0x7fff360b5880}}
        fd = 2
        on_2 = <optimised out>
        list = <optimised out>
        nlist = <optimised out>
        cp = <optimised out>
        written = <optimised out>
#3  0x00007fd789815bc9 in malloc_printerr (ptr=<optimised out>, str=0x7fd7899261a0 "free(): invalid next size (fast)", action=1) at malloc.c:4965
        buf = "0000000001ca17b0"
        cp = <optimised out>
#4  _int_free (av=<optimised out>, p=<optimised out>, have_lock=0) at malloc.c:3834
        size = <optimised out>
        fb = <optimised out>
        nextchunk = <optimised out>
        nextsize = <optimised out>
        prevsize = <optimised out>
        bck = <optimised out>
        fwd = <optimised out>
        errstr = <optimised out>
        locked = <optimised out>
#5  0x00007fd7898197fc in __GI___libc_free (mem=<optimised out>) at malloc.c:2950
        ar_ptr = <optimised out>
        p = <optimised out>
        hook = <optimised out>
#6  0x00007fd78801d3be in ?? () from /usr/lib/python3/dist-packages/gi/_gi.cpython-35m-x86_64-linux-gnu.so
No symbol table info available.
#7  0x00007fd78765ac2f in ffi_closure_unix64_inner () from /usr/lib/x86_64-linux-gnu/libffi.so.6
No symbol table info available.
#8  0x00007fd78765afa8 in ffi_closure_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6
No symbol table info available.
#9  0x00007fd786459c69 in ?? () from /usr/lib/x86_64-linux-gnu/libunity.so.9
No symbol table info available.
#10 0x00007fd786459fd4 in unity_scope_loader_load_scope () from /usr/lib/x86_64-linux-gnu/libunity.so.9
No symbol table info available.
#11 0x00007fd78765ae40 in ffi_call_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6
No symbol table info available.
#12 0x00007fd78765a8ab in ffi_call () from /usr/lib/x86_64-linux-gnu/libffi.so.6
No symbol table info available.
#13 0x00007fd78801f364 in ?? () from /usr/lib/python3/dist-packages/gi/_gi.cpython-35m-x86_64-linux-gnu.so
No symbol table info available.
#14 0x00007fd788021048 in ?? () from /usr/lib/python3/dist-packages/gi/_gi.cpython-35m-x86_64-linux-gnu.so
No symbol table info available.
#15 0x00007fd788015d15 in ?? () from /usr/lib/python3/dist-packages/gi/_gi.cpython-35m-x86_64-linux-gnu.so
No symbol table info available.
#16 0x000000000058feae in PyObject_Call ()
No symbol table info available.
#17 0x0000000000514e31 in PyEval_EvalFrameEx ()
No symbol table info available.
#18 0x000000000051498f in PyEval_EvalFrameEx ()
No symbol table info available.
#19 0x0000000000518ca8 in ?? ()
No symbol table info available.
#20 0x00000000005f800f in PyEval_EvalCode ()
No symbol table info available.
#21 0x0000000000608e12 in ?? ()
No symbol table info available.
#22 0x000000000060afda in PyRun_FileExFlags ()
No symbol table info available.
#23 0x000000000060b79c in PyRun_SimpleFileExFlags ()
No symbol table info available.
#24 0x000000000062b8f0 in Py_Main ()
No symbol table info available.
#25 0x00000000004cbc9f in main ()
No symbol table info available.