.
Thread 1 (process 11520):
#0  sp_lpe_item_get_effect_list (lpeitem=<value optimized out>)
    at /usr/include/c++/4.4/ext/new_allocator.h:105
No locals.
#1  0x00000000004ca936 in sp_lpe_item_has_broken_path_effect (
    lpeitem=<value optimized out>) at sp-lpe-item.cpp:614
	effect_list = {<std::_List_base<Inkscape::LivePathEffect::LPEObjectReference*, std::allocator<Inkscape::LivePathEffect::LPEObjectReference*> >> = {
    _M_impl = {<std::allocator<std::_List_node<Inkscape::LivePathEffect::LPEObjectReference*> >> = {<__gnu_cxx::new_allocator<std::_List_node<Inkscape::LivePathEffect::LPEObjectReference*> >> = {<No data fields>}, <No data fields>}, 
      _M_node = {_M_next = 0x6c99fb0, 
        _M_prev = 0x6c99fb0}}}, <No data fields>}
#2  0x00000000009079aa in sp_genericellipse_set_shape (shape=0x4813120)
    at sp-ellipse.cpp:188
	s = <value optimized out>
	e = <value optimized out>
	len = <value optimized out>
	aff = {_c = {0, 1, 0, 0, 1, 0}}
	slice = <value optimized out>
#3  0x00000000009067b9 in sp_arc_modified (object=0x4813120, 
    flags=<value optimized out>) at sp-ellipse.cpp:859
No locals.
#4  0x00000000004d2625 in SPObject::emitModified (this=0x4813120, flags=73)
    at sp-object.cpp:1383
	__PRETTY_FUNCTION__ = "void SPObject::emitModified(unsigned int)"
#5  0x00000000004bfcf6 in CGroup::onModified (this=0x71ad1c0, flags=0)
    at sp-item-group.cpp:711
	l = <value optimized out>
#6  0x00000000004d2625 in SPObject::emitModified (this=0x4804d90, flags=2)
    at sp-object.cpp:1383
	__PRETTY_FUNCTION__ = "void SPObject::emitModified(unsigned int)"
#7  0x00000000004bfcf6 in CGroup::onModified (this=0x2c5d570, flags=0)
    at sp-item-group.cpp:711
	l = <value optimized out>
#8  0x00000000004d2625 in SPObject::emitModified (this=0x1e581f0, flags=2)
    at sp-object.cpp:1383
	__PRETTY_FUNCTION__ = "void SPObject::emitModified(unsigned int)"
#9  0x00000000004bfcf6 in CGroup::onModified (this=0x2c24490, flags=0)
    at sp-item-group.cpp:711
	l = <value optimized out>
#10 0x00000000004e1b15 in sp_root_modified (object=0x2bf6170, flags=2)
    at sp-root.cpp:565
No locals.
#11 0x00000000004d2625 in SPObject::emitModified (this=0x2bf6170, flags=2)
    at sp-object.cpp:1383
	__PRETTY_FUNCTION__ = "void SPObject::emitModified(unsigned int)"
#12 0x0000000000458478 in SPDocument::_emitModified (this=0x260cf00)
    at document.cpp:753
	flags = 7
#13 0x0000000000458638 in SPDocument::_updateDocument (this=0x260cf00)
    at document.cpp:900
No locals.
#14 0x00000000004586ef in sp_document_ensure_up_to_date (doc=0x260cf00)
    at document.cpp:918
	counter = 64
#15 0x00000000004a9933 in sp_conn_end_move_compensate (path=0x7fa82aa84e40, 
    updatePathRepr=160) at sp-conn-end.cpp:138
	h2attItem = {0x6c09a98, 0x1863}
	ancestor = <value optimized out>
	path2anc = {_c = {5.9373686822319293e-316, 5.6360360685707697e-316, 
    6.0499709859493495e-316, 1.7457833310951447e-316, 
    6.0404627914082638e-316, 5.6360360685707697e-316}}
	endPts = {{_pt = {5.6387372242697129e-316, 6.9347179938278035e-310}}, 
  {_pt = {5.6810822073909578e-316, 6.9532314565427201e-310}}}
#16 0x00000000004ab89d in emitPathInvalidationNotification (
    ptr=<value optimized out>) at /usr/include/sigc++-2.0/sigc++/signal.h:690
	path = (SPPath *) 0x4815a40
#17 0x00000000009cc9a1 in Avoid::Router::callbackAllInvalidConnectors (
    this=<value optimized out>) at libavoid/router.cpp:360
No locals.
#18 0x000000000087e6e6 in ~SPAvoidRef (this=0x602b8c0)
    at conn-avoid-ref.cpp:51
	router = (class Avoid::Router *) 0x728bcb0
#19 0x00000000004bbfe3 in sp_item_release (object=0x4813120)
    at sp-item.cpp:433
No locals.
#20 0x00000000004d2d29 in SPObject::releaseReferences (this=0x4813120)
    at sp-object.cpp:881
	__PRETTY_FUNCTION__ = "void SPObject::releaseReferences()"
#21 0x00000000004d32c5 in sp_object_detach (parent=0x4804d90, 
    object=0x4813120) at sp-object.cpp:659
	__PRETTY_FUNCTION__ = "void sp_object_detach(SPObject*, SPObject*)"
	prev = <value optimized out>
	next = <value optimized out>
#22 0x00000000004d3398 in sp_object_release (object=0x4804d90)
    at sp-object.cpp:740
No locals.
#23 0x00000000004bc069 in sp_item_release (object=0x4804d90)
    at sp-item.cpp:450
No locals.
#24 0x00000000004d2d29 in SPObject::releaseReferences (this=0x4804d90)
    at sp-object.cpp:881
	__PRETTY_FUNCTION__ = "void SPObject::releaseReferences()"
#25 0x00000000004d32c5 in sp_object_detach (parent=0x1e581f0, 
    object=0x4804d90) at sp-object.cpp:659
	__PRETTY_FUNCTION__ = "void sp_object_detach(SPObject*, SPObject*)"
	prev = <value optimized out>
	next = <value optimized out>
#26 0x00000000004c15a1 in sp_group_remove_child (object=0x1e581f0, 
    child=0x6da8fd0) at sp-item-group.cpp:191
No locals.
#27 0x00000000009618ba in Inkscape::XML::CompositeNodeObserver::notifyChildRemoved (this=0x260b150, node=@0x260b1d0, child=@0x6da8fd0, prev=0x0)
    at xml/composite-node-observer.cpp:49
No locals.
#28 0x000000000071c76f in Inkscape::XML::SimpleNode::removeChild (
    this=0x260b100, generic_child=<value optimized out>)
    at xml/simple-node.cpp:433
	__PRETTY_FUNCTION__ = "virtual void Inkscape::XML::SimpleNode::removeChild(Inkscape::XML::Node*)"
	ref = (Inkscape::XML::SimpleNode *) 0x0
	child = <value optimized out>
	tracker = {<Inkscape::Debug::EventTrackerBase> = {
    _vptr.EventTrackerBase = 0xb454d0, _active = true}, <No data fields>}
	next = <value optimized out>
#29 0x00000000004d3bee in SPObject::deleteObject (this=0x4804d90, 
    propagate=true, propagate_descendants=false) at xml/repr.h:118
	repr = (class Inkscape::XML::Node *) 0x6da8fd0
#30 0x00000000004c0bdd in sp_item_group_ungroup (group=<value optimized out>, 
    children=<value optimized out>, do_done=<value optimized out>)
    at sp-item-group.cpp:479
	__PRETTY_FUNCTION__ = "void sp_item_group_ungroup(SPGroup*, GSList**, bool)"
	root = <value optimized out>
	prepr = (class Inkscape::XML::Node *) 0x260b1d0
	doc = (class SPDocument *) 0x260cf00
	gitem = (SPItem *) 0x4804d90
	grepr = <value optimized out>
	items = (GSList *) 0x3720620
	objects = (GSList *) 0x0
	pos = 0
#31 0x00000000004895cf in sp_selection_ungroup (desktop=0x2644c00)
    at selection-chemistry.cpp:581
	group = (SPItem *) 0x4804d90
	children = (GSList *) 0x0
	i = (GSList *) 0x711f990
	selection = <value optimized out>
	items = (GSList *) 0x711f990
	new_select = (GSList *) 0x0
	ungrouped = true
#32 0x0000000000604523 in sp_action_perform (action=0x264f5b0, data=0x0)
    at helper/action.cpp:181
	avector = <value optimized out>
	i = <value optimized out>
	aobject = (NRActiveObject *) 0x264f5b0
	tracker = {<Inkscape::Debug::EventTrackerBase> = {
    _vptr.EventTrackerBase = 0xaf07d0, _active = true}, <No data fields>}
#33 0x00007fa82e8b460e in g_closure_invoke ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#34 0x00007fa82e8cb6f9 in g_signal_connect_data ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#35 0x00007fa82e8b64c5 in g_object_unref () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#36 0x00007fa82e8d92ba in ?? () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#37 0x00007fa82aa93a00 in ?? () from /lib/libpthread.so.0
No symbol table info available.
#38 0x00000000037aa420 in ?? ()
No symbol table info available.
#39 0x0000000001e1f8c0 in ?? ()
No symbol table info available.
#40 0x00007fff69fb3960 in ?? ()
No symbol table info available.
#41 0x0000000000000000 in ?? ()
No symbol table info available.