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POVC10 unordered_set/map move constructor bug?
 

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  1. POVC10 unordered_set/map move constructor bug?
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    <p>It seems that the move constructors of unordered_set/map under VC10 (Visual Studio 2010) puts the right hand side to an undefined state after being invoked, causing other operations (such as 'insert') to fail miserably. The move assignment operators seem to work fine. The normal set/map seem to behave correctly under all cases though. Furthermore, everything seems to be working fine under VC11 (Visual Studio 2012).</p> <p>Is this a bug on the _Hash implementation under VC10 or I am missing anything? Thanks in advance for any inputs!</p> <pre><code>#include &lt;set&gt; #include &lt;map&gt; #include &lt;unordered_set&gt; #include &lt;unordered_map&gt; std::set&lt;int&gt; si0; std::unordered_set&lt;int&gt; usi0; std::map&lt;int, int&gt; mii0; std::unordered_map&lt;int, int&gt; umii0; int _tmain(int argc, _TCHAR* argv[]) { si0.insert(0); si0.insert(1); si0.insert(2); std::set&lt;int&gt; si( std::move(si0) ); // fine! si0.insert(666); usi0.insert(0); usi0.insert(1); usi0.insert(2); //std::unordered_set&lt;int&gt; usi( std::move(usi0) ); // this seems to put usi0 to an undefined state, which makes 'insert' below cry! std::unordered_set&lt;int&gt; usi; usi = std::move(usi0); // this works! usi0.insert(666); mii0[0] = 0; mii0[1] = 1; mii0[2] = 2; std::map&lt;int, int&gt; mii( std::move(mii0) ); // fine! mii0[666] = 666; umii0[0] = 0; umii0[1] = 1; umii0[2] = 2; //std::unordered_map&lt;int, int&gt; umii( std::move(umii0) ); // this seems to put umii0 to an undefined state, which makes 'insert' below cry! std::unordered_map&lt;int, int&gt; umii; umii = std::move(umii0); // this works! umii0[666] = 666; return 0; } </code></pre>
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