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POMixing versions of the MSVCRT
 

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    <p>So, I have a C++ library with a statically linked copy of the MSVCRT. I want for anyone to be able to use my library with any version of the MSVC Runtime. What is the best way to accomplish this goal? </p> <p>I'm already being quite careful with how things are done. </p> <ol> <li>Memory never passes the DLL barrier to be freed</li> <li>Runtime C++ objects aren't passed across barriers (ie, vectors, maps, etc.. unless they were created on that side of the barrier)</li> <li>No file handles or resource handles are passed between barriers</li> </ol> <p>Yet, I still have some simple code that causes heap corruption. </p> <p>I have an object like so in my library:</p> <pre><code>class Foos { public: //There is an Add method, but it's not used, so not relevant here DLL_API Foos(); DLL_API ~Foos(); private: std::map&lt;std::wstring, Foo*&gt; map; }; Foos::~Foos() { // start at the begining and go to the end deleting the data object for(std::map&lt;std::wstring, Foo*&gt;::iterator it = map.begin(); it != map.end(); it++) { delete it-&gt;second; } map.clear(); } </code></pre> <p>And then I use it from my application like so:</p> <pre><code>void bar() { Foos list; } </code></pre> <p>After I call this function from anywhere, I get a debug warning about stack corruption. And If I actually let it run out, it actually does corrupt the stack and segfault. </p> <p>My calling application is compiled with Visual Studio 2012 platform tools. The library is compiled using Visual Studio 2010 platform tools. </p> <p>Is this just something I should absolutely not be doing, or am I actually violating the rules for using multiple runtimes? </p>
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    1. CODoes the error still happen if you remove code from the destructor? (I am asking because this code should be a no-op)
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    2. CO@anatolyg yes, I still get stack corruption when removing all of the code from the destructor
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    3. COAll it does it creates the `map` field (because it's not a pointer) and then destructs it. That apparently causes stack corruption. If I down-target to VS2010 and build my app that way, it works fine
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