Comment 5 for bug 1053616

And here is the backtrace.

 #0 page_parse_line (size_changed=<synthetic pointer>, n=0, line=0x1f98380, self=0x1f6f8e0) at page.c:569
  _tmp24_ = <optimized out>
  _tmp28_ = 0x7f20e00b7970 "p"
  _tmp31_ = 112 'p'
  _tmp24__length1 = 0
  _tmp28__length1 = 161
  _tmp23_ = <optimized out>
  _tmp27_ = 0x1f98380
  _tmp19_ = <optimized out>
  _tmp22_ = 0x1f98380
  _tmp21_ = <optimized out>
  _tmp18_ = 0
  i = <optimized out>
  _tmp1_ = <optimized out>
  _tmp14_ = 0
  offset = 0
  _tmp17_ = 80
  line_offset = 0
  _vala_size_changed = 0
  _tmp2_ = 0
  _tmp15_ = 0
  _tmp33_ = <optimized out>
  line_number = 853
  _tmp0_ = 0x1f98380
  _tmp13_ = 853
  _tmp16_ = 0x1f98380
 #1 page_parse_scan_line (self=0x1f6f8e0, line=0x1f98380) at page.c:617
  _tmp1_ = <optimized out>
  _tmp3_ = <optimized out>
  _tmp5_ = <optimized out>
  _tmp7_ = 0
  _tmp4_ = 0x1f98380
  _tmp6_ = 0x1f98380
  _tmp8_ = 0
  _tmp0_ = 0
  i = <optimized out>
  size_has_changed = <optimized out>
  _tmp9_ = <optimized out>
  __PRETTY_FUNCTION__ = "page_parse_scan_line"
 #2 0x000000000041a161 in application_scanner_line_cb (line=<optimized out>, scanner=<optimized out>, self=<optimized out>)
     at simple-scan.c:1181
  _tmp3_ = 0x1f6f8e0
  _tmp0_ = 0x1f6f8e0
  _tmp2_ = 0
 #3 _application_scanner_line_cb_scanner_got_line (_sender=0x0, line=0x1f98380, self=0x0) at simple-scan.c:464
 No locals.
 #4 0x00007f20ecc6c6e0 in g_closure_invoke (closure=0x19344e0, return_value=0x0, n_param_values=2, param_values=0x7fffae471bc0,
     invocation_hint=0x7fffae471b60) at /tmp/buildd/glib2.0-2.33.12+really2.32.4/./gobject/gclosure.c:777
  marshal = 0x41f080 <g_cclosure_user_marshal_VOID__SCAN_LINE>
  marshal_data = 0x0
  in_marshal = 0
  real_closure = 0x19344c0
  __PRETTY_FUNCTION__ = "g_closure_invoke"
 #5 0x00007f20ecc7d750 in signal_emit_unlocked_R (node=node@entry=0x1932f30, detail=detail@entry=0, instance=instance@entry=0x18e2be0,
     emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fffae471bc0)
     at /tmp/buildd/glib2.0-2.33.12+really2.32.4/./gobject/gsignal.c:3551
  tmp = <optimized out>
  handler = 0x1932a30
  accumulator = 0x0
  emission = {next = 0x0, instance = 0x18e2be0, ihint = {signal_id = 253, detail = 0, run_type = G_SIGNAL_RUN_FIRST},
    state = EMISSION_RUN, chain_type = 4}
  class_closure = 0x0
  hlist = 0x1932a30
  handler_list = 0x1932a30
  return_accu = 0x0
  accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0,
        v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0,
        v_double = 0, v_pointer = 0x0}}}
  signal_id = 253
  max_sequential_handler_number = 3301
  return_value_altered = 0
 #6 0x00007f20ecc856bc in g_signal_emit_valist (instance=instance@entry=0x18e2be0, signal_id=signal_id@entry=253, detail=detail@entry=0,
     var_args=var_args@entry=0x7fffae471e68) at /tmp/buildd/glib2.0-2.33.12+really2.32.4/./gobject/gsignal.c:3300
  instance_and_params = 0x7fffae471bc0
  signal_return_type = 4
  param_values = 0x7fffae471bd8
  node = 0x1932f30
  i = <optimized out>
  n_params = 1
  __PRETTY_FUNCTION__ = "g_signal_emit_valist"
 #7 0x00007f20ecc85d60 in g_signal_emit_by_name (instance=0x18e2be0, detailed_signal=0x4304ac "got-line")
     at /tmp/buildd/glib2.0-2.33.12+really2.32.4/./gobject/gsignal.c:3393
  var_args = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7fffae471fa0, reg_save_area = 0x7fffae471eb0}}
  detail = 0
  signal_id = 253
  __PRETTY_FUNCTION__ = "g_signal_emit_by_name"
 #8 0x0000000000421b51 in scanner_notify_idle_cb (self=0x18e2be0) at scanner.c:3108
  _tmp1_ = 0x1932720
  _tmp0_ = <optimized out>
  notification = 0x1932720
 #9 _scanner_notify_idle_cb_gsource_func (self=0x18e2be0) at scanner.c:3122
 No locals.
 #10 0x00007f20ec9ad355 in g_main_dispatch (context=0x1789b20) at /tmp/buildd/glib2.0-2.33.12+really2.32.4/./glib/gmain.c:2539
  dispatch = 0x7f20ec9ab070 <g_idle_dispatch>
  was_in_call = 0
  user_data = 0x18e2be0
  callback = 0x421b20 <_scanner_notify_idle_cb_gsource_func>
  cb_funcs = 0x7f20ecc599c0
  cb_data = 0x7f20e00bd4f0
  current_source_link = {data = 0x7f20e00aec80, next = 0x0}
  need_destroy = <optimized out>
  source = 0x7f20e00aec80
  current = 0x194bdc0
  i = <optimized out>
 #11 g_main_context_dispatch (context=context@entry=0x1789b20) at /tmp/buildd/glib2.0-2.33.12+really2.32.4/./glib/gmain.c:3075
 No locals.
 #12 0x00007f20ec9ad688 in g_main_context_iterate (context=0x1789b20, block=block@entry=1, dispatch=dispatch@entry=1,
     self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /tmp/buildd/glib2.0-2.33.12+really2.32.4/./glib/gmain.c:3146
  max_priority = 2147483647
  timeout = 56
  some_ready = 1
  nfds = <optimized out>
  allocated_nfds = <optimized out>
  fds = 0x19cd0a0
 #13 0x00007f20ec9ada82 in g_main_loop_run (loop=0x19cdbc0) at /tmp/buildd/glib2.0-2.33.12+really2.32.4/./glib/gmain.c:3340
  __PRETTY_FUNCTION__ = "g_main_loop_run"
 #14 0x00007f20edf393b5 in gtk_main () at /tmp/buildd/gtk+3.0-3.4.2/./gtk/gtkmain.c:1161
  loop = 0x19cdbc0
 #15 0x000000000041c6b5 in application_main (args=0x7fffae4721e8, args_length1=1) at simple-scan.c:2440
  result = 0
  _tmp0_ = <optimized out>
  _tmp1_ = 0x1788560
  c = 0x1788560
  _tmp2_ = 0x1788560
  _tmp3_ = 0x1788560
  _tmp4_ = <optimized out>
  _tmp14_ = <optimized out>
  _tmp16_ = <optimized out>
  device = 0x0
  _tmp29_ = <optimized out>
  _tmp29__length1 = <optimized out>
  _tmp39_ = <optimized out>
  _tmp40_ = <optimized out>
  _tmp41_ = <optimized out>
  path = 0x1788900 "/home/joey/.cache/simple-scan/simple-scan.log"
  _tmp42_ = <optimized out>
  _tmp43_ = <optimized out>
  _tmp44_ = 0x1788900 "/home/joey/.cache/simple-scan/simple-scan.log"
  _tmp45_ = 0x1788900 "/home/joey/.cache/simple-scan/simple-scan.log"
  _tmp46_ = <optimized out>
  _tmp47_ = <optimized out>
  _tmp48_ = 0x0
  _tmp49_ = 0x1766000
  app = 0x1766000
  _tmp50_ = 0x1766000
  _inner_error_ = 0x0
 #16 0x00007f20ebaf0ead in __libc_start_main (main=<optimized out>, argc=<optimized out>, ubp_av=<optimized out>, init=<optimized out>,
     fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffae4721d8) at libc-start.c:228
  result = <optimized out>
  unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -6545761377955333404, 4250432, 140736117285344, 0, 0, 6545863566285617892,
          6586831025095064292}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x42db60, 0x7fffae4721e8}, data = {prev = 0x0,
        cleanup = 0x0, canceltype = 4381536}}}
  not_first_call = <optimized out>
 #17 0x000000000040db69 in _start ()
 No symbol table info available.