xsane crash on scanning second page

[Ricardo Peta]

water@water:~$ uname -a
Linux water 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:58:30 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

water@water:~$ lsb_release -rd
Description: Linux Mint 20
Release: 20

water@water:~$ coredumpctl info 4760
           PID: 4760 (xsane)
           UID: 1000 (water)
           GID: 1000 (water)
        Signal: 6 (ABRT)
     Timestamp: Sun 2020-10-18 10:39:47 CEST (46s ago)
  Command Line: xsane
    Executable: /usr/bin/xsane
 Control Group: /user.slice/user-1000.slice/[e-mail]/dbus.service
          Unit: [e-mail]
     User Unit: dbus.service
         Slice: user-1000.slice
     Owner UID: 1000 (water)
       Boot ID: b44c7db349e247478e0f53a89e2f4cef
    Machine ID: 2e6db7b3feeb408ba59f7482257bc249
      Hostname: water
       Storage: /var/lib/systemd/coredump/core.xsane.1000.b44c7db349e247478e0f53a89e2f4c>
       Message: Process 4760 (xsane) of user 1000 dumped core.

                Stack trace of thread 4760:
                #0 0x00007fbf1aa9618b __GI_raise (libc.so.6 + 0x4618b)
                #1 0x00007fbf1aa75859 __GI_abort (libc.so.6 + 0x25859)
                #2 0x00007fbf1aae03ee __libc_message (libc.so.6 + 0x903ee)
                #3 0x00007fbf1aae847c malloc_printerr (libc.so.6 + 0x9847c)
                #4 0x00007fbf1aaea12c _int_free (libc.so.6 + 0x9a12c)
                #5 0x00007fbf14b1f9cd sane_escl_read (libsane-escl.so.1 + 0x79cd)
                #6 0x00005589378137d0 n/a (xsane + 0x827d0)
                #7 0x0000558937812b31 n/a (xsane + 0x81b31)
                #8 0x0000558937814b66 xsane_scan_dialog (xsane + 0x83b66)
                #9 0x00007fbf1b0aa802 g_closure_invoke (libgobject-2.0.so.0 + 0x14802)
                #10 0x00007fbf1b0be814 n/a (libgobject-2.0.so.0 + 0x28814)
                #11 0x00007fbf1b0c9b9e g_signal_emit_valist (libgobject-2.0.so.0 + 0x33b>
                #12 0x00007fbf1b0ca0d3 g_signal_emit (libgobject-2.0.so.0 + 0x340d3)
                #13 0x00007fbf1b24622e n/a (libgtk-x11-2.0.so.0 + 0x9522e)
                #14 0x00007fbf1b0aa802 g_closure_invoke (libgobject-2.0.so.0 + 0x14802)
                #15 0x00007fbf1b0be962 n/a (libgobject-2.0.so.0 + 0x28962)
                #16 0x00007fbf1b0c9b9e g_signal_emit_valist (libgobject-2.0.so.0 + 0x33b>
                #17 0x00007fbf1b0ca0d3 g_signal_emit (libgobject-2.0.so.0 + 0x340d3)
                #18 0x00007fbf1b2450a9 n/a (libgtk-x11-2.0.so.0 + 0x940a9)
                #19 0x00007fbf1b2eeb9b n/a (libgtk-x11-2.0.so.0 + 0x13db9b)
                #20 0x00007fbf1b0aa802 g_closure_invoke (libgobject-2.0.so.0 + 0x14802)
                #21 0x00007fbf1b0bdf96 n/a (libgobject-2.0.so.0 + 0x27f96)
                #22 0x00007fbf1b0c945d g_signal_emit_valist (libgobject-2.0.so.0 + 0x334>
                #23 0x00007fbf1b0ca0d3 g_signal_emit (libgobject-2.0.so.0 + 0x340d3)
                #24 0x00007fbf1b40a22d n/a (libgtk-x11-2.0.so.0 + 0x25922d)
                #25 0x00007fbf1b2ecccc gtk_propagate_event (libgtk-x11-2.0.so.0 + 0x13bc>
                #26 0x00007fbf1b2ed0c3 gtk_main_do_event (libgtk-x11-2.0.so.0 + 0x13c0c3)
                #27 0x00007fbf1b1556d0 n/a (libgdk-x11-2.0.so.0 + 0x5f6d0)
                #28 0x00007fbf1afbcfbd g_main_context_dispatch (libglib-2.0.so.0 + 0x51f>
                #29 0x00007fbf1afbd240 n/a (libglib-2.0.so.0 + 0x52240)
                #30 0x00007fbf1afbd533 g_main_loop_run (libglib-2.0.so.0 + 0x52533)
                #31 0x00007fbf1b2ec092 gtk_main (libgtk-x11-2.0.so.0 + 0x13b092)
                #32 0x0000558937824e13 n/a (xsane + 0x93e13)
                #33 0x00005589377b4a76 main (xsane + 0x23a76)
                #34 0x00007fbf1aa770b3 __libc_start_main (libc.so.6 + 0x270b3)
                #35 0x00005589377b4b4e _start (xsane + 0x23b4e)

                Stack trace of thread 4763:
                #0 0x00007fbf1ab6596f __GI___poll (libc.so.6 + 0x11596f)
                #1 0x00007fbf1aa451a2 n/a (libusb-1.0.so.0 + 0x111a2)
                #2 0x00007fbf1ac4b609 start_thread (libpthread.so.0 + 0x9609)
                #3 0x00007fbf1ab72103 __clone (libc.so.6 + 0x122103)

                Stack trace of thread 4765:
                #0 0x00007fbf1ab6596f __GI___poll (libc.so.6 + 0x11596f)
                #1 0x00007fbf14ea509e n/a (libavahi-common.so.3 + 0x809e)
                #2 0x00007fbf14ea4c11 avahi_simple_poll_run (libavahi-common.so.3 + 0x7>
                #3 0x00007fbf14ea4df0 avahi_simple_poll_iterate (libavahi-common.so.3 +>
                #4 0x00007fbf14ea5025 avahi_simple_poll_loop (libavahi-common.so.3 + 0x>
                #5 0x00007fbf14ea50fb n/a (libavahi-common.so.3 + 0x80fb)
                #6 0x00007fbf1ac4b609 start_thread (libpthread.so.0 + 0x9609)
                #7 0x00007fbf1ab72103 __clone (libc.so.6 + 0x122103)

water@water:~$ xsane -version
xsane-0.999 (c) 1998-2013 Oliver Rauch
  E-mail: <email address hidden>
  package xsane-0.999
  compiled with GTK-2.24.32
  with color management function
  with GIMP support, compiled with GIMP-2.10.14
  XSane output formats: jpeg, pdf(compr.), png, pnm, ps(compr.), tiff, txt

Reproducible by:
- Start xsane and scan one page -> OK
- Press 'scan' again to scan a second page -> Crash