[Bug middle-end/81669] trunk/gcc/fibonacci_heap.h:58: possible missing initialisation ?

["msebor at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81669

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-02-02
                 CC|                            |msebor at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed.  The default constructor appears to be used in the definition of
fibonacci_heap::replace_key_data (fibonacci_node<K,V> *node, K key, V *data):

  ...
  /* If we wanted to, we do a real increase by redeleting and
     inserting.  */
  if (node->compare_data (key) > 0)
    {
      delete_node (node, false);

      node = new (node) fibonacci_node_t ();
      insert (node, key, data);

      return odata;


Having a test case showing what breaks because of it would provide motivation
to fix it.