Hi, Falco:<br><br>Have you made any progress in this issue?<br>I&#39;ve encountered halt at the same point: /usr/include/boost/variant/detail/visitation_impl.hpp:203 while deleting a boost Asio Timer object.<br>I&#39;m using Boost 
v1.33.1 and Asio v0.3.6, and I&#39;m not aware that Asio has &quot;serialization&quot; feature (is it new in Asio v0.3.7+?).&nbsp; And this halt does NOT happen on the my code unless I compiled it with &quot;-O2&quot;; so, too bad, I don&#39;t have a readable gdb backtrace.&nbsp; But from the log info in my code, it happens close to the point in some of my class destructor that contains Asio Timer object.&nbsp; I don&#39;t use boost &quot;variant&quot; class in my code, and I guess it must be asio that uses it, and i have no clue how it leads to halt at line 203.
<br><br>HTH &amp; Let me know if you have any info on why it happens,<br><br>--- Jeffrey<br><br><div><span class="gmail_quote">On 3/23/07, <b class="gmail_sendername">Falco Hirschenberger</b> &lt;<a href="mailto:falco.hirschenberger@itwm.fraunhofer.de">
falco.hirschenberger@itwm.fraunhofer.de</a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi,<br><br>I have defined a recursive variant type like this:
<br>---<br>typedef boost::make_recursive_variant&lt;bool,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; int,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; double,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; std::string,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; std::vector&lt; boost::recursive_variant_ &gt;,
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; std::map&lt;std::string, boost::recursive_variant_&gt;,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; TGrey8Image,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; TRgbImage,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; TRgbaImage&gt;::type TVType;<br>---<br>and two containers which can store this type:
<br>---<br>typedef std::vector&lt;TVType&gt; TVector;<br>typedef std::map&lt;std::string, TVType&gt; TMap;<br>---<br>I wrote a set of unit-tests testing all types of plain and recursive<br>containers and they work as expected.
<br>I also tested (de-)serialization to a binary archive and there&#39;s also no<br>problem.<br>Then I implemented a Message class which contains such a TVType + some other<br>stuff. Serializing and deserializing also works in the tests.
<br>Finally I implemented a client and server with ASIO like the<br>ASIO &quot;serialization&quot; example. First sending the size of the archive and<br>then the data itself. The sending works but when I want to deserialize my
<br>message I get the following assertion:<br>---<br>testSerialization: /usr/include/boost/variant/detail/visitation_impl.hpp:203:<br>typename Visitor::result_type boost::detail::variant::visitation_impl(int,<br>int, Visitor&amp;, VPCV, mpl_::true_, NBF, W*, S*) [with W = mpl_::int_&lt;20&gt;, S
<br>=<br>boost::detail::variant::visitation_impl_step&lt;boost::mpl::l_iter&lt;boost::mpl::l_end&gt;,<br>boost::mpl::l_iter&lt;boost::mpl::l_end&gt; &gt;, Visitor =<br>boost::detail::variant::invoke_visitor&lt;boost::detail::variant::direct_assigner&lt;const
<br>int&gt; &gt;, VPCV = void*, NBF =<br>boost::variant&lt;boost::detail::variant::recursive_flag&lt;bool&gt;, int, double,<br>std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;,<br>std::vector&lt;boost::recursive_variant_,
<br>std::allocator&lt;boost::recursive_variant_&gt; &gt;,<br>std::map&lt;std::basic_string&lt;char, std::char_traits&lt;char&gt;,<br>std::allocator&lt;char&gt; &gt;, boost::recursive_variant_,<br>std::less&lt;std::basic_string&lt;char, std::char_traits&lt;char&gt;,
<br>std::allocator&lt;char&gt; &gt; &gt;, std::allocator&lt;std::pair&lt;const<br>std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;,<br>boost::recursive_variant_&gt; &gt; &gt;, CIS::Image2d&lt;unsigned char&gt;,
<br>CIS::Image2d&lt;CIS::RGB&gt;, CIS::Image2d&lt;CIS::RGBA&gt;,<br>boost::detail::variant::void_, boost::detail::variant::void_,<br>boost::detail::variant::void_, boost::detail::variant::void_,<br>boost::detail::variant::void_, boost::detail::variant::void_,
<br>boost::detail::variant::void_, boost::detail::variant::void_,<br>boost::detail::variant::void_, boost::detail::variant::void_,<br>boost::detail::variant::void_&gt;::has_fallback_type_]: Assertion `false&#39;<br>failed.
<br>---<br>I absolutely don&#39;t know what&#39;t wrong here the backtrace iss huge but the<br>point in my code where it happens is the line when deserializing the<br>message. When I comment out the TVType payload of the message, it works.
<br><br>I would really appreciate any clue.<br><br>Greetings,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Falco<br><br><br><br><br>_______________________________________________<br>Boost-users mailing list<br><a href="mailto:Boost-users@lists.boost.org">
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