id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	revision
420	Memory corruption when using IterableValueMap on Class derived from lemon Graph	Alpar Juttner	Balazs Dezso	"A post from Bernhard Kausler on lemon-devel@lemon.cs.elte.hu:

The following code causes a memory access error.
- Tested for lemon 1.2.1 and the latest lemon-main sources
- Doesn't happen for other graph maps like IdMap

---------- code begin ---------
#include <lemon/list_graph.h>
#include <lemon/maps.h>

using namespace lemon;

class MyGraph : public ListDigraph {
};

int main() {
  MyGraph derived;
  IterableValueMap<MyGraph, MyGraph::Node, int> derived_m2(derived);

  derived.addNode();

  return 0;
}
---------- code end -----------

gdb backtrace:
#0  0x00000000004059a3 in lemon::IterableValueMap<MyGraph,
lemon::ListDigraphBase::Node, int>::unlace (this=0x7fffffffdcf0,
key=...) at lemon-main/lemon/maps.h:3098
#1  0x0000000000405050 in lemon::IterableValueMap<MyGraph,
lemon::ListDigraphBase::Node, int>::add (this=0x7fffffffdcf0, key=...)
at lemon-main/lemon/maps.h:3255
#2  0x00000000004026ab in
lemon::AlterationNotifier<lemon::DigraphExtender<lemon::ListDigraphBase>, lemon::ListDigraphBase::Node>::add
(this=0x7fffffffdcc0, item=...) at
/home/bkausler/loca/include/lemon/bits/alteration_notifier.h:356
#3  0x00000000004018a7 in
lemon::DigraphExtender<lemon::ListDigraphBase>::addNode
(this=0x7fffffffdc80) at
/home/bkausler/local/include/lemon/bits/graph_extender.h:269
#4  0x00000000004012c8 in lemon::ListDigraph::addNode
(this=0x7fffffffdc80) at lemon-main/lemon/list_graph.h:352
#5  0x0000000000400f54 in main () at inheritance-bug.cpp:15"	defect	new	critical	LEMON 1.3 release	core	hg main