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    <p>These are relatively cheap mechanisms for possibly solving the problem:</p> <ol> <li>Keep an eye on my <a href="https://stackoverflow.com/questions/1069/heap-corruption-under-win32-how-to-locate">heap corruption question</a> - I'm updating with the answers as they shake out. The first was balancing <code>new[]</code> and <code>delete[]</code>, but you're already doing that.</li> <li>Give <a href="http://valgrind.org/" rel="nofollow noreferrer">valgrind</a> more of a go; it's an excellent tool, and I only wish it was available under Windows. I only slows your program down by about half, which is pretty good compared to the Windows equivalents.</li> <li>Think about using the <a href="http://code.google.com/p/google-perftools/" rel="nofollow noreferrer">Google Performance Tools</a> as a replacement malloc/new.</li> <li>Have you cleaned out all your object files and started over? Perhaps your make file is... "suboptimal"</li> <li>You're not <code>assert()</code>ing enough in your code. How do I know that without having seen it? Like flossing, no-one <code>assert()</code>s enough in their code. Add in a validation function for your objects and call that on method start and method end.</li> <li>Are you <a href="http://gcc.gnu.org/onlinedocs/gcc-4.3.0/cpp/Invocation.html#Invocation" rel="nofollow noreferrer">compiling -wall</a>? If not, do so.</li> <li>Find yourself a lint tool like <a href="http://www.gimpel.com/" rel="nofollow noreferrer">PC-Lint</a>. A small app like yours might fit in the <a href="http://gimpel-online.com/cgi-bin/genPage.py?srcFile=diy.cpp&amp;cgiScript=analyseCode.py&amp;title=Blank+Slate+(C%2B%2B)+&amp;intro=An+empty+page+in+which+to+write+your+own+C%2B%2B+code.&amp;compilerOption=co-gcc.lnt+co-gnu3.lnt&amp;includeOption=%7B%7BquotedIncludeOption%7D%7D" rel="nofollow noreferrer">PC-lint demo</a> page, meaning no purchase for you!</li> <li>Check you're NULLing out pointers after deleteing them. Nobody likes a dangling pointer. Same gig with declared but unallocated pointers.</li> <li>Stop using arrays. Use a <a href="http://en.wikipedia.org/wiki/Vector_(STL)" rel="nofollow noreferrer">vector</a> instead.</li> <li>Don't use raw pointers. Use a <a href="http://en.wikipedia.org/wiki/Smart_pointer" rel="nofollow noreferrer">smart pointer</a>. Don't use <code>auto_ptr</code>! That thing is... surprising; its semantics are very odd. Instead, choose one of the <a href="http://www.boost.org/doc/libs/1_35_0/libs/smart_ptr/smart_ptr.htm" rel="nofollow noreferrer">Boost smart pointers</a>, or something out of <a href="http://en.wikipedia.org/wiki/Loki_(C%2B%2B)" rel="nofollow noreferrer">the Loki library</a>.</li> </ol>
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    1. POOf Memory Management, Heap Corruption, and C++
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    1. CO+1, good list! However, I'd dispute #8 - while it prevents 'bad' accesses, it's actually a code smell that hides poor logic or poor object lifetime management in my experience...
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