https://svn.boost.org/trac10/ticket/11379 <p> 'boost::heap::pairing_heap&lt;int, boost::heap::compare&lt;Compare&gt; &gt;::end' tries to default-construct a 'Compare' object, and fails to compile if 'Compare' is not default constructible. This is an error. If the iterator requires a 'Compare' object, it should copy-construct this from the object stored in the heap data structure. See attached file for a minimal example </p> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/11379 Trac 1.4.3 Rainer Deyke <rainerd@…> Sun, 07 Jun 2015 09:51:56 GMT https://svn.boost.org/trac10/ticket/11379 https://svn.boost.org/trac10/ticket/11379 <ul> <li><strong>attachment</strong> → <span class="trac-field-new">pairing_heap_test.cpp</span> </li> </ul> Ticket timblechmann Sun, 07 Jun 2015 11:40:40 GMT https://svn.boost.org/trac10/ticket/11379#comment:2 https://svn.boost.org/trac10/ticket/11379#comment:2 <ul> <li><strong>status</strong> <span class="trac-field-old">new</span> → <span class="trac-field-new">closed</span> </li> <li><strong>resolution</strong> → <span class="trac-field-new">fixed</span> </li> </ul> Ticket