assertion failed, file sp-conn-end.cpp: line 191

[Bug Importer]

While trying to group together some nodes in the attached drawing I keep
hitting this assertion.

** ERROR **: file sp-conn-end.cpp: line 191 (NR::Point
calc_bbox_conn_pt(const NR::Rect&, const NR::Point&)): assertion failed:
((offset[otherDim] >= 0) == (cp[otherDim] >= 0))

I'm running inkscape-0.45.1-1.fc6 from Fedora Extras 6.

I'm trying to group the tree on the far left so I can distribute the three
on the left equally.

(gdb) bt
#0 0x00cc9402 in __kernel_vsyscall ()
#1 0x0101fd40 in raise () from /lib/libc.so.6
#2 0x01021591 in abort () from /lib/libc.so.6
#3 0x00143c92 in g_logv () from /lib/libglib-2.0.so.0
#4 0x00143cc9 in g_log () from /lib/libglib-2.0.so.0
#5 0x00143d46 in g_assert_warning () from /lib/libglib-2.0.so.0
#6 0x081d9fc6 in calc_bbox_conn_pt (bbox=@0xbfbbd4f4, p=@0xbfbbd794)
    at sp-conn-end.cpp:191
#7 0x081da52f in sp_conn_end_move_compensate (mp=<value optimized out>,
    moved_item=<value optimized out>, path=0xb5632f8, updatePathRepr=true)
    at sp-conn-end.cpp:85
#8 0x081d8e2b in emitPathInvalidationNotification (ptr=0xb5632f8)
    at /usr/include/sigc++-2.0/sigc++/signal.h:686
#9 0x0849bbd0 in Avoid::Router::callbackAllInvalidConnectors
(this=0xa4e0e68)
    at libavoid/router.cpp:339
#10 0x0849cb4d in Avoid::Router::addShape (this=0xa4e0e68,
shape=0xbbcfa28)
    at libavoid/router.cpp:108
#11 0x082438eb in SPAvoidRef::handleSettingChange (this=0xa5d16c8)
    at conn-avoid-ref.cpp:111
#12 0x081f08f4 in sp_item_update (object=0xa57c4a0, ctx=0xbfbbdaf8,
    flags=<value optimized out>) at sp-item.cpp:629
#13 0x082097fb in sp_shape_update (object=0xa57c4a0, ctx=0xbfbbdaf8,
flags=13)
    at sp-shape.cpp:212
---Type <return> to continue, or q <return> to quit---
#14 0x081f7e4b in SPObject::updateDisplay (this=0xa57c4a0, ctx=0xbfbbdaf8,

    flags=12) at sp-object.cpp:1236
#15 0x081ec641 in CGroup::onUpdate (this=0xaba0670, ctx=0xbfbbdc38,
flags=15)
    at sp-item-group.cpp:616
#16 0x081f7e4b in SPObject::updateDisplay (this=0xa584db0, ctx=0xbfbbdc38,

    flags=12) at sp-object.cpp:1236
#17 0x081ec641 in CGroup::onUpdate (this=0xa5d2520, ctx=0xbfbbdd78,
flags=11)
    at sp-item-group.cpp:616
#18 0x081f7e4b in SPObject::updateDisplay (this=0xa584eb8, ctx=0xbfbbdd78,

    flags=0) at sp-object.cpp:1236
#19 0x081ec641 in CGroup::onUpdate (this=0xa4e64d0, ctx=0xbfbbdeb8,
flags=2)
    at sp-item-group.cpp:616
#20 0x081f7e4b in SPObject::updateDisplay (this=0xa568038, ctx=0xbfbbdeb8,

    flags=0) at sp-object.cpp:1236
#21 0x081ec641 in CGroup::onUpdate (this=0xa4cf2a8, ctx=0xbfbbdfd8,
flags=2)
    at sp-item-group.cpp:616
#22 0x08206d6f in sp_root_update (object=0xa4df100, ctx=0xbfbbe248,
flags=2)
    at sp-root.cpp:544
#23 0x081f7e4b in SPObject::updateDisplay (this=0xa4df100, ctx=0xbfbbe248,

    flags=0) at sp-object.cpp:1236
#24 0x081bb4c3 in SPDocument::_updateDocument (this=0xa59afa0)
    at document.cpp:763
#25 0x081bb531 in sp_document_ensure_up_to_date (doc=0xa59afa0)
---Type <return> to continue, or q <return> to quit---
    at document.cpp:785
#26 0x08257429 in sp_document_maybe_done (doc=0xa59afa0, key=0x0,
    event_type=50, event_description=@0xbfbbe37c) at document-undo.cpp:141
#27 0x0825786c in sp_document_done (doc=0xa59afa0, event_type=50,
    event_description=@0xbfbbe468) at document-undo.cpp:121
#28 0x081d169c in sp_selection_group () at selection-chemistry.cpp:518
#29 0x0844db15 in sp_action_perform (action=0xaa8bd20, data=0x0)
    at helper/action.cpp:146
#30 0x081d623a in sp_shortcut_invoke (shortcut=33554535, view=0xa9cfe00)
    at shortcuts.cpp:53
#31 0x08450a27 in sp_window_key_press (widget=0xac213f0, event=0xae2e370)
    at helper/window.cpp:33
#32 0x004d90f0 in gtk_marshal_BOOLEAN__VOID ()
   from /usr/lib/libgtk-x11-2.0.so.0
#33 0x00d65f0b in g_closure_invoke () from /lib/libgobject-2.0.so.0
#34 0x00d77171 in g_signal_override_class_closure ()
   from /lib/libgobject-2.0.so.0
#35 0x00d78147 in g_signal_emit_valist () from /lib/libgobject-2.0.so.0
#36 0x00d78539 in g_signal_emit () from /lib/libgobject-2.0.so.0
#37 0x005ed1c8 in gtk_widget_get_default_style ()
   from /usr/lib/libgtk-x11-2.0.so.0
#38 0x004d25ca in gtk_propagate_event () from /usr/lib/libgtk-x11-2.0.so.0
#39 0x004d3797 in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#40 0x0025f0ea in gdk_add_client_message_filter ()
   from /usr/lib/libgdk-x11-2.0.so.0
#41 0x0013b342 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#42 0x0013e31f in g_main_context_check () from /lib/libglib-2.0.so.0
#43 0x0013e6c9 in g_main_loop_run () from /lib/libglib-2.0.so.0
#44 0x004d3c14 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#45 0x068bc287 in Gtk::Main::run_impl () from /usr/lib/libgtkmm-2.4.so.1
#46 0x068bc072 in Gtk::Main::run () from /usr/lib/libgtkmm-2.4.so.1
#47 0x081b5d27 in sp_main_gui (argc=2, argv=0xbfbbecd4) at main.cpp:656
#48 0x082b36e3 in Inkscape::NSApplication::Application::run
(this=0xbfbbec14)
    at application/application.cpp:117
#49 0x081b61fd in main (argc=2, argv=0xbfbbecd4) at main.cpp:491

[Nstraz (nstraz)]

Originator: NO

More details (and I recovered my login),

(gdb) info locals
ctr = {_pt = {0, 0}}
lengths = {_pt = {-2e+18, -2e+18}}
cp = {_pt = {501.20339341674804, 258.21708869934082}}
offset = {_pt = {-2e+18, -1.0303884294918756e+18}}
__PRETTY_FUNCTION__ = "NR::Point calc_bbox_conn_pt(const NR::Rect&, const
NR::Point&)"

[Nstraz (nstraz)]

Originator: NO

(gdb) info args
bbox = (const NR::Rect &) @0xbf94c274: {_min = {_pt = {1e+18, 1e+18}},
_max = {
    _pt = {-1e+18, -1e+18}}}
p = (const NR::Point &) @0xbf94c514: {_pt = {501.20339341674804,
    258.21708869934082}}

[Buliabyak-users (buliabyak-users)]

Originator: NO

Michael: in svn it does not crash on grouping the tree, but one of the
connectors runs to the 0,0 point. And it crashes if I undo grouping.

[Johan Engelen (johanengelen)]

Added null-pointer checks to sp_item_update which fixes the crash. One of the connector still runs to 0,0, also after undoing the grouping. Seems this is caused by bug: #168667