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04.06.2006 at 04:46PM PDT, ID: 21804947
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Debug assertion failed: dbgdel.cpp line 52 _BLOCK_TYPE_IS_VALID(pHead->nBlockUse)

Tags: assertion, _block_type_is_valid
In a mixed C++ DLL that uses MFC (called from VB.NET) I have the narrowed down the problem to two lines of code:

      SimpleClass * sim = new SimpleClass;
      delete sim;

when stepping (or running) through the delete, it generates "Debug assertion failed: dbgdel.cpp line 52 _BLOCK_TYPE_IS_VALID(pHead->nBlockUse)"

I have also narrowed down SimpleClass to an empty class:

#include "StdAfx.h"
#include ".\simpleclass.h"

SimpleClass::SimpleClass(void)
{
}

SimpleClass::~SimpleClass(void)
{
}

All my cpp files and the project are using the "Multi-threaded Debug DLL (/MDd)" runtime library.
I must be missing something simple...
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Question Stats
Zone: Programming
Question Asked By: pcad696
Solution Provided By: GranMod
Participating Experts: 3
Solution Grade: B
Views: 143
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04.06.2006 at 08:39PM PDT, ID: 16397686

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04.06.2006 at 08:48PM PDT, ID: 16397710

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04.07.2006 at 06:51PM PDT, ID: 16405681

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04.07.2006 at 08:27PM PDT, ID: 16405923

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04.10.2006 at 07:56AM PDT, ID: 16417909

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04.14.2006 at 01:26PM PDT, ID: 16456938

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