https://svn.boost.org/trac10/ticket/13050 <p> When serializing a boost::optional with T = std::vector, it will fail to load. This is a regression in Boost 1.64 as 1.63 does not appear to exhibit the issue. </p> <p> The following code will exhibit the issue: </p> <pre class="wiki">boost::optional&lt;std::vector&lt;std::uint8_t&gt;&gt; opt{}; std::string in_str{ "22 serialization::archive 15 0 0 1 0 4 0 0 1 2 3" }; std::istringstream iss{in_str}; boost::archive::text_iarchive ia{iss}; ia &gt;&gt; opt; </pre><p> This should set opt to a valid optional containing a vector of {0, 1, 2, 3}. However it will instead either segfault or enter an infinite loop. </p> <p> The cause appears to be related to a change in boost/serialization/optional.hpp, where stack storage was changed from using detail::stack_construct to detail::stack_allocate. The error appears to come from trying to use an undefined vector object. </p> <p> This was only tested on OSX using the following: </p> <pre class="wiki">Apple LLVM version 8.1.0 (clang-802.0.42) Target: x86_64-apple-darwin16.6.0 Thread model: posix </pre> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/13050 Trac 1.4.3 anonymous Fri, 02 Jun 2017 15:46:14 GMT https://svn.boost.org/trac10/ticket/13050#comment:2 https://svn.boost.org/trac10/ticket/13050#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