spiro node editing (possibly with undo) consistently causes a crash

[Garrett]

I have been editing spiro paths in node editing mode. I repeatedly move the nodes around, once in a while hitting undo. I'm not entirely sure if undo is causing this to happen, but I think it simply has to do with node movement or the spiro path effect.

It doesn't happen all the time, but it happens quite a bit. It makes glyph shaping (for a custom logotype) very difficult and frustrating.

Here's a backtrace of the crasher:

Program received signal SIGSEGV, Segmentation fault.
Inkscape::UI::Node::setType (this=<value optimized out>) at ui/tool/node.cpp:591
591 double dist = Geom::distance(_next()->position(), position());
(gdb) bt
#0 0x000000000084ba6e in Inkscape::UI::Node::setType (this=<value optimized out>)
#1 0x0000000000845c14 in Inkscape::UI::MultiPathManipulator::setNodeType (this=0x6136e40, type=
    NODE_SMOOTH) at ui/tool/multi-path-manipulator.cpp:225
#2 0x00007ffff4c424fe in IA__g_closure_invoke (closure=0x2b47d50, return_value=0x0, n_param_values=1,
    param_values=0x6c61680, invocation_hint=0x7fffffffc740) at gclosure.c:767
#3 0x00007ffff4c56a84 in signal_emit_unlocked_R (node=0x2a00900, detail=<value optimized out>,
    instance=<value optimized out>, emission_return=<value optimized out>,
    instance_and_params=<value optimized out>) at gsignal.c:3318
#4 0x00007ffff4c57b56 in IA__g_signal_emit_valist (instance=0x2b42d80, signal_id=<value optimized out>,
    detail=0, var_args=0x7fffffffc930) at gsignal.c:2981
#5 0x00007ffff4c58113 in IA__g_signal_emit (instance=0x5e9e1d0, signal_id=0, detail=100581216)
    at gsignal.c:3038
#6 0x00007ffff63cefc3 in _gtk_action_emit_activate (action=0x2b42d80 [InkAction]) at gtkaction.c:755
#7 0x00007ffff655e4d9 in button_clicked (widget=<value optimized out>, button=0x2d24bb0 [GtkToolButton])
    at gtktoolbutton.c:768
#8 0x00007ffff4c424fe in IA__g_closure_invoke (closure=0x2c43fe0, return_value=0x0, n_param_values=1,
    param_values=0x6496020, invocation_hint=0x7fffffffcb70) at gclosure.c:767
#9 0x00007ffff4c56598 in signal_emit_unlocked_R (node=0x10f1790, detail=<value optimized out>,
    instance=<value optimized out>, emission_return=<value optimized out>,
    instance_and_params=<value optimized out>) at gsignal.c:3248
#10 0x00007ffff4c57b56 in IA__g_signal_emit_valist (instance=0x2d2fb40, signal_id=<value optimized out>,
    detail=0, var_args=0x7fffffffcd60) at gsignal.c:2981
#11 0x00007ffff4c58113 in IA__g_signal_emit (instance=0x5e9e1d0, signal_id=0, detail=100581216)
    at gsignal.c:3038
#12 0x00007ffff63e9225 in gtk_real_button_released (button=0x5e9e1d0) at gtkbutton.c:1725
#13 0x00007ffff4c424fe in IA__g_closure_invoke (closure=0x1155ac0, return_value=0x0, n_param_values=1,
    param_values=0x6467640, invocation_hint=0x7fffffffcf80) at gclosure.c:767
#14 0x00007ffff4c55f31 in signal_emit_unlocked_R (node=0x10f16c0, detail=<value optimized out>,
    instance=<value optimized out>, emission_return=<value optimized out>,
    instance_and_params=<value optimized out>) at gsignal.c:3178
#15 0x00007ffff4c57b56 in IA__g_signal_emit_valist (instance=0x2d2fb40, signal_id=<value optimized out>,
    detail=0, var_args=0x7fffffffd170) at gsignal.c:2981
#16 0x00007ffff4c58113 in IA__g_signal_emit (instance=0x5e9e1d0, signal_id=0, detail=100581216)
    at gsignal.c:3038
#17 0x00007ffff63e7f2d in gtk_button_button_release (widget=0x5e9e1d0, event=0x0) at gtkbutton.c:1617
#18 0x00007ffff6494e68 in _gtk_marshal_BOOLEAN__BOXED (closure=0x1157630, return_value=0x7fffffffd400,
    n_param_values=<value optimized out>, param_values=0x34774a0, invocation_hint=<value optimized out>,
    marshal_data=0x7ffff63e7f10) at gtkmarshalers.c:84
#19 0x00007ffff4c424fe in IA__g_closure_invoke (closure=0x1157630, return_value=0x7fffffffd400,
    n_param_values=2, param_values=0x34774a0, invocation_hint=0x7fffffffd3c0) at gclosure.c:767
#20 0x00007ffff4c562ad in signal_emit_unlocked_R (node=0x11578b0, detail=<value optimized out>,
    instance=<value optimized out>, emission_return=<value optimized out>,
    instance_and_params=<value optimized out>) at gsignal.c:3286
#21 0x00007ffff4c57999 in IA__g_signal_emit_valist (instance=0x2d2fb40, signal_id=<value optimized out>,
    detail=0, var_args=0x7fffffffd5b0) at gsignal.c:2991
#22 0x00007ffff4c58113 in IA__g_signal_emit (instance=0x5e9e1d0, signal_id=0, detail=100581216)
    at gsignal.c:3038
#23 0x00007ffff65aae3f in gtk_widget_event_internal (widget=0x2d2fb40 [GtkButton], event=0x6d331e0)
    at gtkwidget.c:4943
#24 0x00007ffff648d347 in IA__gtk_propagate_event (widget=0x2d2fb40 [GtkButton], event=0x6d331e0)
    at gtkmain.c:2442
#25 0x00007ffff648e3cb in IA__gtk_main_do_event (event=0x6d331e0) at gtkmain.c:1647
#26 0x00007ffff610255c in gdk_event_dispatch (source=<value optimized out>,
    callback=<value optimized out>, user_data=<value optimized out>) at gdkevents-x11.c:2372
#27 0x00007ffff3763880 in g_main_dispatch (context=<value optimized out>) at gmain.c:1960
#28 IA__g_main_context_dispatch (context=<value optimized out>) at gmain.c:2513
#29 0x00007ffff37676e8 in g_main_context_iterate (context=0x112fe20, block=<value optimized out>,
    dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:2591
#30 0x00007ffff3767bfd in IA__g_main_loop_run (loop=0x236c4a0) at gmain.c:2799
#31 0x00007ffff648e8a7 in IA__gtk_main () at gtkmain.c:1219
#32 0x00000000004558db in sp_main_gui (argc=1, argv=0x7fffffffdbf8) at main.cpp:983
#33 0x0000000000454d61 in main (argc=1, argv=<value optimized out>) at main.cpp:719

[su_v (suv-lp)]

Could you add information about os and Inkscape version?

[Garrett (garrettl)]

Oh sorry.

This is from bzr, on openSUSE 11.2 (Linux).

The about splash says: Inkscape 0.47+devel r9610 custom

[su_v (suv-lp)]

Would it be possible to attach one of the files that you experience these crashes with? I have been trying to reproduce it (with r9607), but maybe my Spiro test paths are not complex enough?

Did you ctrl-click nodes to toggle their node type (smooth -> auto-smooth -> symmetric -> cusp) before the crash happened? AFAICT the backtrace has no indication that the crash was related to 'Undo' (see bug #540591: Undo LPE editing in node tool crashes).

[su_v (suv-lp)]

From the backtrace:
> Inkscape::UI::Node::setType (this=<value optimized out>) at ui/tool/node.cpp:591

Possibly same underlying issue as bug #605575 “crash when changing node type ” (i.e. not diretly related to 'Undo' or path effects)?

[su_v (suv-lp)]

Linking as duplicate to bug #bug #605575 - please add a comment here and revert the duplicate status if you don't agree and think these are different issues.