.
Thread 2 (Thread 0x7fe5047c9700 (LWP 17946)):
#0  0x00007fe50fc59dc3 in poll () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007fe5047edde0 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#2  0x00007fe5047ecccd in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#3  0x00007fe5047d7c05 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#4  0x00007fe5047d906d in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#5  0x00007fe5047d8524 in dbus_connection_send_with_reply_and_block () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#6  0x00007fe504a17f21 in avahi_service_resolver_new () from /usr/lib/x86_64-linux-gnu/libavahi-client.so.3
No symbol table info available.
#7  0x00007fe504e31b5b in ?? () from /usr/lib/x86_64-linux-gnu/sane/libsane-net.so.1
No symbol table info available.
#8  0x00007fe504a16c1b in avahi_service_browser_event () from /usr/lib/x86_64-linux-gnu/libavahi-client.so.3
No symbol table info available.
#9  0x00007fe504a131f9 in ?? () from /usr/lib/x86_64-linux-gnu/libavahi-client.so.3
No symbol table info available.
#10 0x00007fe5047d89a6 in dbus_connection_dispatch () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#11 0x00007fe504a19dd6 in ?? () from /usr/lib/x86_64-linux-gnu/libavahi-client.so.3
No symbol table info available.
#12 0x00007fe504c26630 in avahi_simple_poll_dispatch () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
No symbol table info available.
#13 0x00007fe504c2691d in avahi_simple_poll_loop () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
No symbol table info available.
#14 0x00007fe504c2699c in ?? () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
No symbol table info available.
#15 0x00007fe50ea2ae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#16 0x00007fe50fc6577d in clone () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#17 0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 0x7fe510330700 (LWP 17938)):
#0  0x00007fe5047f07e0 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#1  0x00007fe5047e16b0 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#2  0x00007fe5047d52fe in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#3  0x00007fe5047edc6c in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#4  0x00007fe5047ede52 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#5  0x00007fe5047ecccd in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#6  0x00007fe5047d7c05 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#7  0x00007fe5047d8de4 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#8  0x00007fe5047d8f01 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#9  0x00007fe5047d8524 in dbus_connection_send_with_reply_and_block () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#10 0x00007fe5047d3b74 in dbus_bus_register () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#11 0x00007fe5047d3e64 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#12 0x00007fe503db0272 in ?? () from /usr/lib/sane/libsane-hpaio.so.1
No symbol table info available.
#13 0x00007fe503da964c in sane_hpaio_init () from /usr/lib/sane/libsane-hpaio.so.1
No symbol table info available.
#14 0x00007fe50ff33910 in ?? () from /usr/lib/x86_64-linux-gnu/libsane.so.1
No symbol table info available.
#15 0x00007fe50ff342cd in sane_dll_get_devices () from /usr/lib/x86_64-linux-gnu/libsane.so.1
No symbol table info available.
#16 0x0000000000401b7b in ?? ()
No symbol table info available.
#17 0x00007fe50fb9676d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#18 0x000000000040380d in ?? ()
No symbol table info available.
#19 0x00007fff293112b8 in ?? ()
No symbol table info available.
#20 0x000000000000001c in ?? ()
No symbol table info available.
#21 0x0000000000000002 in ?? ()
No symbol table info available.
#22 0x00007fff293134be in ?? ()
No symbol table info available.
#23 0x00007fff293134c8 in ?? ()
No symbol table info available.
#24 0x0000000000000000 in ?? ()
No symbol table info available.