#0  g_logv (log_domain=0x7ffff7a5569d "Gtk", log_level=<optimized out>, 
    format=0x7ffff7b0ebd8 "Invalid text buffer iterator: either the iterator is uninitialized, or the characters/pixbufs/widgets in the buffer have been modified since the iterator was created.\nYou must use marks, character num"..., args1=0x7fffffffbbe8) at /build/buildd/glib2.0-2.32.3/./glib/gmessages.c:765
#1  0x00007ffff64ca1b2 in g_log (log_domain=<optimized out>, log_level=<optimized out>, format=<optimized out>) at /build/buildd/glib2.0-2.32.3/./glib/gmessages.c:792
#2  0x00007ffff7977fac in gtk_text_iter_make_surreal (_iter=<optimized out>) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtktextiter.c:174
#3  gtk_text_iter_make_surreal (_iter=<optimized out>) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtktextiter.c:167
#4  0x00007ffff7978c3b in gtk_text_iter_get_offset (iter=<optimized out>) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtktextiter.c:598
#5  0x00007ffff7a4bfe1 in insert_text_cb (buffer=0x7ce080, iter=<optimized out>, text=0xb9e150 ",", len=1, data=0x6fc210) at /build/buildd/gtk+3.0-3.4.2/./gtk/a11y/gtktextviewaccessible.c:1750
#6  0x00007ffff6adaca2 in g_closure_invoke (closure=0x80c2b0, return_value=0x0, n_param_values=4, param_values=0x7fffffffbef0, invocation_hint=<optimized out>)
    at /build/buildd/glib2.0-2.32.3/./gobject/gclosure.c:777
#7  0x00007ffff6aebfdd in signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x0, instance_and_params=0x7fffffffbef0)
    at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3617
#8  0x00007ffff6af4099 in g_signal_emit_valist (instance=0x7ce080, signal_id=<optimized out>, detail=0, var_args=<optimized out>) at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3296
#9  0x00007ffff6af4242 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3352
#10 0x00007ffff796f5d0 in gtk_text_buffer_insert_interactive (buffer=0x7ce080, iter=0x7fffffffc260, text=0xb9e150 ",", len=-1, default_editable=1)
    at /build/buildd/gtk+3.0-3.4.2/./gtk/gtktextbuffer.c:1018
#11 0x00007ffff796f69f in gtk_text_buffer_insert_interactive_at_cursor (buffer=0x7ce080, text=0xb9e150 ",", len=-1, default_editable=1) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtktextbuffer.c:1056
#12 0x00007ffff79938c6 in gtk_text_view_commit_text (text_view=0x8000d0, str=0xb9e150 ",") at /build/buildd/gtk+3.0-3.4.2/./gtk/gtktextview.c:7743
#13 0x00007ffff6addc30 in g_cclosure_marshal_VOID__STRINGv (closure=0x7fbd70, return_value=<optimized out>, instance=0x7fa800, args=<optimized out>, marshal_data=<optimized out>, 
    n_params=<optimized out>, param_types=0x7fb920) at /build/buildd/glib2.0-2.32.3/./gobject/gmarshal.c:1004
#14 0x00007ffff6adaeca in _g_closure_invoke_va (closure=0x7fbd70, return_value=0x0, instance=0x7fa800, args=0x7fffffffc698, n_params=1, param_types=<optimized out>)
    at /build/buildd/glib2.0-2.32.3/./gobject/gclosure.c:840
#15 0x00007ffff6af3741 in g_signal_emit_valist (instance=0x7fa800, signal_id=<optimized out>, detail=0, var_args=<optimized out>) at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3207
#16 0x00007ffff6af4754 in g_signal_emit_by_name (instance=0x7fa800, detailed_signal=<optimized out>) at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3389
#17 0x00007ffff6addc30 in g_cclosure_marshal_VOID__STRINGv (closure=0xb38870, return_value=<optimized out>, instance=0x970380, args=<optimized out>, marshal_data=<optimized out>, 
    n_params=<optimized out>, param_types=0x7fb920) at /build/buildd/glib2.0-2.32.3/./gobject/gmarshal.c:1004
#18 0x00007ffff6adaeca in _g_closure_invoke_va (closure=0xb38870, return_value=0x0, instance=0x970380, args=0x7fffffffcaf8, n_params=1, param_types=<optimized out>)
    at /build/buildd/glib2.0-2.32.3/./gobject/gclosure.c:840
#19 0x00007ffff6af3741 in g_signal_emit_valist (instance=0x970380, signal_id=<optimized out>, detail=0, var_args=<optimized out>) at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3207
#20 0x00007ffff6af4242 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3352
#21 0x00007ffff6addc30 in g_cclosure_marshal_VOID__STRINGv (closure=0xb38510, return_value=<optimized out>, instance=0xa42920, args=<optimized out>, marshal_data=<optimized out>, 
    n_params=<optimized out>, param_types=0x7fb920) at /build/buildd/glib2.0-2.32.3/./gobject/gmarshal.c:1004
#22 0x00007ffff6adaeca in _g_closure_invoke_va (closure=0xb38510, return_value=0x0, instance=0xa42920, args=0x7fffffffcf08, n_params=1, param_types=<optimized out>)
    at /build/buildd/glib2.0-2.32.3/./gobject/gclosure.c:840
#23 0x00007ffff6af3741 in g_signal_emit_valist (instance=0xa42920, signal_id=<optimized out>, detail=0, var_args=<optimized out>) at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3207
#24 0x00007ffff6af4754 in g_signal_emit_by_name (instance=0xa42920, detailed_signal=<optimized out>) at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3389
#25 0x00007ffff78b4f40 in gtk_im_context_simple_commit_char (context=0xa42920, ch=44) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkimcontextsimple.c:192
#26 0x00007ffff78b5636 in no_sequence_matches (event=0x7fffffffd7e0, n_compose=<optimized out>, context_simple=0xa42920) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkimcontextsimple.c:754
#27 gtk_im_context_simple_filter_keypress (context=<optimized out>, event=<optimized out>) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkimcontextsimple.c:1079
#28 0x00007ffff78b760e in gtk_im_multicontext_filter_keypress (context=<optimized out>, event=0x7fffffffd7e0) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkimmulticontext.c:353
#29 0x00007ffff799494b in gtk_text_view_key_press_event (widget=0x8000d0, event=0x7fffffffd7e0) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtktextview.c:4435
#30 0x00007ffff78cd408 in _gtk_marshal_BOOLEAN__BOXED (closure=0x6bdf00, return_value=0x7fffffffd3e0, n_param_values=<optimized out>, param_values=0x7fffffffd450, 
    invocation_hint=<optimized out>, marshal_data=<optimized out>) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkmarshalers.c:85
#31 0x00007ffff6adac1b in g_closure_invoke (closure=0x6bdf00, return_value=0x7fffffffd3e0, n_param_values=2, param_values=0x7fffffffd450, invocation_hint=<optimized out>)
    at /build/buildd/glib2.0-2.32.3/./gobject/gclosure.c:777
#32 0x00007ffff6aec339 in signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x7fffffffd620, instance_and_params=0x7fffffffd450)
    at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3585
#33 0x00007ffff6af3d7e in g_signal_emit_valist (instance=0x8000d0, signal_id=<optimized out>, detail=0, var_args=<optimized out>) at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3306
#34 0x00007ffff6af4242 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3352
#35 0x00007ffff79f87e9 in gtk_widget_event_internal (widget=0x8000d0, event=0x7fffffffd7e0) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkwidget.c:6380
#36 0x00007ffff7a1255b in gtk_window_propagate_key_event (window=0x7da0b0, event=0x7fffffffd7e0) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkwindow.c:6063
#37 0x00007ffff7a1503b in gtk_window_key_press_event (widget=0x7da0b0, event=0x7fffffffd7e0) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkwindow.c:6093
#38 0x0000000000439208 in math_window_real_key_press_event (base=0x7da0b0, event=0xb77b40) at math-window.c:273
#39 0x00007ffff78cd501 in _gtk_marshal_BOOLEAN__BOXEDv (closure=0x6bdf00, return_value=0x7fffffffdab0, instance=0x7da0b0, args=<optimized out>, marshal_data=<optimized out>, 
    n_params=<optimized out>, param_types=0x6bdf30) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkmarshalers.c:130
#40 0x00007ffff6adaeca in _g_closure_invoke_va (closure=0x6bdf00, return_value=0x7fffffffdab0, instance=0x7da0b0, args=0x7fffffffdb58, n_params=1, param_types=<optimized out>)
    at /build/buildd/glib2.0-2.32.3/./gobject/gclosure.c:840
#41 0x00007ffff6af3741 in g_signal_emit_valist (instance=0x7da0b0, signal_id=<optimized out>, detail=0, var_args=<optimized out>) at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3207
#42 0x00007ffff6af4242 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.32.3/./gobject/gsignal.c:3352
#43 0x00007ffff79f87e9 in gtk_widget_event_internal (widget=0x7da0b0, event=0xb77b40) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkwidget.c:6380
#44 0x00007ffff78cb55c in propagate_event (widget=0x7da0b0, event=0xb77b40, captured=<optimized out>, topmost=<optimized out>) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkmain.c:2493
#45 0x00007ffff78cd0c1 in gtk_main_do_event (event=0xb77b40) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkmain.c:1717
#46 0x00007ffff751cd32 in gdk_event_source_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at /build/buildd/gtk+3.0-3.4.2/./gdk/x11/gdkeventsource.c:358
#47 0x00007ffff64c2d53 in g_main_dispatch (context=0x6b2b30) at /build/buildd/glib2.0-2.32.3/./glib/gmain.c:2539
#48 g_main_context_dispatch (context=0x6b2b30) at /build/buildd/glib2.0-2.32.3/./glib/gmain.c:3075
#49 0x00007ffff64c30a0 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x6b2b30, self=<optimized out>) at /build/buildd/glib2.0-2.32.3/./glib/gmain.c:3146
#50 g_main_context_iterate (context=0x6b2b30, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.32.3/./glib/gmain.c:3083
#51 0x00007ffff64c3164 in g_main_context_iteration (context=0x6b2b30, may_block=1) at /build/buildd/glib2.0-2.32.3/./glib/gmain.c:3207
#52 0x00007ffff6db1c94 in g_application_run (application=0x6ef360, argc=<optimized out>, argv=0x7fffffffe0b8) at /build/buildd/glib2.0-2.32.3/./gio/gapplication.c:1507
#53 0x0000000000411a80 in calculator_main (args=0x7fffffffe0b8, args_length1=1) at gnome-calculator.c:1585
#54 0x00007ffff5bc476d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#55 0x000000000040ff45 in _start ()
