Debug Assertion Fail (MSVC++ 4.2)

Hi!

I have a following problem:
When I allocate something in DLL and then I deallocate it
in application I get assertion failure:

Debug Assertion Failed!
File: dbgheap.c
Line: 1076
Expression: _pFirstBlock == pHead

I'm using VC++ 4.2 / Window95.

Simple demonstration of the problem:
===========================
DLL code:
---------------
__declspec( dllexport ) int* AllocInt()
{
      return new int;
}

Application code:
-------------------------
__declspec( dllimport) int* AllocInt();

void main()
{
    int* i;
    i = AllocInt();
    delete i;  // causes an assertion failure
}

Thanks for help
            Zdenek

---------------------------------------------
Zdenek Zemanek
<zemanek@cit.cdrail.cz>
---------------------------------------------
zdenekzzAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

gvgCommented:
Here is my guess.  
If you look at line 85 in dbgheap.c you can see that _pFirstBlock is
a static variable in dbgheap.c.  Now if your DLL is compiled in
a release version in witch case it doesn't use dbgheap.c the _pFirstBlock
variable in dbgheap.c will not be right when you use debug delete.

In short.  You are using Release new while using Debug delete.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Development

From novice to tech pro — start learning today.