.
Thread 2 (Thread 0x7f8450e83580 (LWP 2180)):
#0  0x00007f844e28ebb7 in epoll_wait (epfd=4, events=0x7fff02e7ef60, maxevents=256, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
        resultvar = 18446744073709551612
        sc_cancel_oldtype = 0
        sc_ret = <optimised out>
#1  0x0000559e83a11147 in ?? ()
No symbol table info available.
#2  0x0000559e83a0a19b in WaitForSomething ()
No symbol table info available.
#3  0x0000559e838a6c73 in ?? ()
No symbol table info available.
#4  0x0000559e838aaf10 in ?? ()
No symbol table info available.
#5  0x00007f844e18eb97 in __libc_start_main (main=0x559e83894b80, argc=12, argv=0x7fff02e7fd98, init=<optimised out>, fini=<optimised out>, rtld_fini=<optimised out>, stack_end=0x7fff02e7fd88) at ../csu/libc-start.c:310
        self = <optimised out>
        __self = <optimised out>
        result = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -5733086720862666197, 94139300006800, 140733242146192, 0, 0, -1968919062457564629, -1992166131646414293}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7f8450c99733 <_dl_init+259>, 0x7f8450c87438}, data = {prev = 0x0, cleanup = 0x0, canceltype = 1355388723}}}
        not_first_call = <optimised out>
#6  0x0000559e83894bba in _start ()
No symbol table info available.
.
Thread 1 (Thread 0x7f8445206700 (LWP 2183)):
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
        set = {__val = {18446744067266838239, 0, 0, 0, 0, 140206265505662, 94139301562000, 67108868, 140206226737296, 0, 0, 6759642893303564032, 4, 94139307684224, 1, 140206265392921}}
        pid = <optimised out>
        tid = <optimised out>
        ret = <optimised out>
#1  0x00007f844e1ad801 in __GI_abort () at abort.c:79
        save_stage = 1
        act = {__sigaction_handler = {sa_handler = 0x4, sa_sigaction = 0x4}, sa_mask = {__val = {94139307684224, 1, 140206265392921, 94139307682072, 94139307728704, 94139307684224, 140206265465102, 94139307682072, 140206265393938, 140205986190304, 94139307684224, 140205986190224, 67108868, 140206226737296, 6759642893303564032, 0}}, sa_flags = 1, sa_restorer = 0x7f8445204330}
        sigs = {__val = {32, 0 <repeats 15 times>}}
        __cnt = <optimised out>
        __set = <optimised out>
        __cnt = <optimised out>
        __set = <optimised out>
#2  0x0000559e83a1361a in OsAbort ()
No symbol table info available.
#3  0x0000559e838eb39c in ddxGiveUp ()
No symbol table info available.
#4  0x0000559e83a19112 in ?? ()
No symbol table info available.
#5  0x0000559e83a19f55 in FatalError ()
No symbol table info available.
#6  0x0000559e83a1070e in ?? ()
No symbol table info available.
#7  <signal handler called>
No locals.
#8  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
        set = {__val = {18446744067266838239, 140205986189904, 1, 140206223087167, 8517419008, 140205986189904, 140205986190005, 140205986189904, 140205986189904, 140205986190015, 140205986190204, 140205986189904, 140205986190204, 0, 0, 0}}
        pid = <optimised out>
        tid = <optimised out>
        ret = <optimised out>
#9  0x00007f844e1ad801 in __GI_abort () at abort.c:79
        save_stage = 1
        act = {__sigaction_handler = {sa_handler = 0x559e84c79610, sa_sigaction = 0x559e84c79610}, sa_mask = {__val = {0, 0, 0, 0, 0, 140206072154776, 0, 140206072154608, 140206224343504, 21474836480, 140206224328664, 0, 6759642893303564032, 140206224313620, 0, 140206224328664}}, sa_flags = 1259777976, sa_restorer = 0x7f844b16af75}
        sigs = {__val = {32, 0 <repeats 15 times>}}
        __cnt = <optimised out>
        __set = <optimised out>
        __cnt = <optimised out>
        __set = <optimised out>
#10 0x00007f844e19d39a in __assert_fail_base (fmt=0x7f844e3247d8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7f844b16af75 "tp->tap.nfingers_down >= 1", file=file@entry=0x7f844b16afb8 "../src/evdev-mt-touchpad-tap.c", line=line@entry=1028, function=function@entry=0x7f844b16b2b0 "tp_tap_handle_state") at assert.c:92
        str = 0x559e84c79610 ""
        total = 4096
#11 0x00007f844e19d412 in __GI___assert_fail (assertion=0x7f844b16af75 "tp->tap.nfingers_down >= 1", file=0x7f844b16afb8 "../src/evdev-mt-touchpad-tap.c", line=1028, function=0x7f844b16b2b0 "tp_tap_handle_state") at assert.c:101
No locals.
#12 0x00007f844b15a9e3 in ?? () from /usr/lib/x86_64-linux-gnu/libinput.so.10
No symbol table info available.
#13 0x00007f844b155e17 in ?? () from /usr/lib/x86_64-linux-gnu/libinput.so.10
No symbol table info available.
#14 0x00007f844b157d90 in ?? () from /usr/lib/x86_64-linux-gnu/libinput.so.10
No symbol table info available.
#15 0x00007f844b14c5e1 in ?? () from /usr/lib/x86_64-linux-gnu/libinput.so.10
No symbol table info available.
#16 0x00007f844b14860f in libinput_dispatch () from /usr/lib/x86_64-linux-gnu/libinput.so.10
No symbol table info available.
#17 0x00007f844b39f988 in ?? () from /usr/lib/xorg/modules/input/libinput_drv.so
No symbol table info available.
#18 0x0000559e83a0ea93 in ?? ()
No symbol table info available.
#19 0x0000559e83a11191 in ?? ()
No symbol table info available.
#20 0x0000559e83a0e8de in ?? ()
No symbol table info available.
#21 0x00007f844e5656db in start_thread (arg=0x7f8445206700) at pthread_create.c:463
        pd = 0x7f8445206700
        now = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140206072162048, 1968912259194864171, 140206072159424, 0, 0, 140733242145776, -1992155622573293013, -1992165638113803733}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#22 0x00007f844e28e88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.