#0  0x00007f5558277267 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
        resultvar = 0
        pid = 761
        selftid = 761
#1  0x00007f5558278eca in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0}}, sa_flags = 0, sa_restorer = 0x0}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f55582bac53 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7f55583d31a8 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
        ap = {{gp_offset = 40, fp_offset = 0, overflow_arg_area = 0x7ffc5a2cbf90, reg_save_area = 0x7ffc5a2cbf20}}
        fd = 2
        on_2 = <optimized out>
        list = <optimized out>
        nlist = <optimized out>
        cp = <optimized out>
        written = <optimized out>
#3  0x00007f55582c2c69 in malloc_printerr (ptr=<optimized out>, str=0x7f55583d3220 "free(): invalid next size (fast)", action=1) at malloc.c:4965
        buf = "00007f555b0a0ba0"
        cp = <optimized out>
#4  _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3834
        size = <optimized out>
        fb = <optimized out>
        nextchunk = <optimized out>
        nextsize = <optimized out>
        prevsize = <optimized out>
        bck = <optimized out>
        fwd = <optimized out>
        errstr = <optimized out>
        locked = <optimized out>
#5  0x00007f55582c689c in __GI___libc_free (mem=<optimized out>) at malloc.c:2950
        ar_ptr = <optimized out>
        p = <optimized out>
        hook = <optimized out>
#6  0x00007f5551f1801b in SynapticsUnInit (drv=<optimized out>, pInfo=0x7f555b973be0, flags=<optimized out>) at ../../src/synaptics.c:972
        priv = 0x7f555b97b970
#7  0x00007f555a62290c in DeleteInputDeviceRequest (pDev=0x7f555b97de80) at ../../../../hw/xfree86/common/xf86Xinput.c:1073
        pInfo = 0x7f555b973be0
        drv = 0x7f555b94ec60
        isMaster = <optimized out>
#8  0x00007f555a5c86bc in CloseDeviceList (listHead=listHead@entry=0x7f555a9cbf90 <inputInfo+16>) at ../../dix/devices.c:1014
        freedIds = {0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0 <repeats 26 times>}
        dev = <optimized out>
#9  0x00007f555a5c922a in CloseDownDevices () at ../../dix/devices.c:1044
        dev = 0x0
#10 0x00007f555a5d830c in dix_main (argc=11, argv=0x7ffc5a2cc308, envp=<optimized out>) at ../../dix/main.c:333
        i = <optimized out>
        alwaysCheckForInput = {0, 1}
#11 0x00007f5558262a40 in __libc_start_main (main=0x7f555a5c2600 <main>, argc=11, argv=0x7ffc5a2cc308, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc5a2cc2f8) at libc-start.c:289
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -2140375271002728111, 140004564936197, 140721821369088, 0, 0, -2082390676305471151, -2140379000463550127}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7f555a740340 <__libc_csu_init>, 0x7ffc5a2cc308}, data = {prev = 0x0, cleanup = 0x0, canceltype = 1517552448}}}
        not_first_call = <optimized out>
#12 0x00007f555a5c262e in _start ()
No symbol table info available.