Re: Exception_Access_Violation

["Alex R. Mosteo" <alejandro@mosteo.com>]

John B. Matthews wrote:

> In article
> <3f465d87-0fc9-415d-a60b-72a0d744dce1@h23g2000vbc.googlegroups.com>,
>  mhamel_98@yahoo.com wrote:
> 
>> Looking for some pointers (!!!) here.  I'm getting the above
>> program_error message when trying to free some pointers.  The context
>> is a double linked list which uses a storage manager to allocate
>> chunks of nodes at a time.  I have an option on Clear to either keep
>> the pool intact for later use, or to deallocate when desired.  When
>> deallocating, I'm using an instantiated unchecked_deallocation, it
>> gets part way through the list, then pops out the program error.  The
>> pointers are being checked for nullness and I've looked at the
>> addresses and the look "ok".  Any tips on what else to look for?
> 
> Any chance the problem pointer is a copy of a previously (and
> successfully) deallocated node?

It looks like that to me too. 

If the error resists. and you're using GNAT, you can try with 
Gnat.Debug_Pools. 
Or Valgrind in any case.