Freeing memory allocated by realloc() throw's error

[GoogleCodeExporter]

What steps will reproduce the problem?

Below steps throw's Guard block error which I expect it shouldn't.

void leak_memory() {
    int * temporary = (int*)realloc(NULL, sizeof(int));
    temporary = (int *) realloc (temporary, (10 * sizeof (int)));
    free (temporary);
}

What is the expected output? What do you see instead?

Expected :-
===========
Allocated memory by realloc function should be free'd and test case should 
pass.

Output Seen:-
=======================================================================
leak_memory_test: Starting test
Guard block of 0x00501120 size=0 allocated by :5247040 at 0x00501118 is 
corrupt
ERROR: src/example/allocate_module.c:33 Failure!
leak_memory_test: Test failed.
1 out of 1 tests failed!
    leak_memory_test
=======================================================================

What version of the product are you using? On what operating system?

Product version - 
=============

cmockery-0.1.2

Operating System -
====================

ukhml-bladeAS4-~/mywork/cmockery-0.1.2/src/example: uname -a
Linux ukhml-bladeAS4 2.6.9-89.0.11.ELsmp #1 SMP Mon Aug 31 11:00:34 EDT 
2009 x86_64 x86_64 x86_64 GNU/Linux
ukhml-bladeAS4-~/mywork/cmockery-0.1.2/src/example:

====================

Please provide any additional information below.

In my actual unit test case, program flow calls these below functions in 
sequence which result in guard block error - 
step 
1.) malloc 
2.) realloc and 
3.) free. 
Only work around I could do was just replace all such calls to 
corresponding calls of realloc function for initial request to memory, re-
sizing memory and for freeing memory which overcame this error.
I was not able to re-produce with this sequence in an independent program. 
Instead a sequence of realloc and free helped in reproducing this error 
message which I mentioned above.
Is it something that realloc is not monitored by comockery ?

Thanks & Regards.,
Naveen Sriram.

Original issue reported on code.google.com by naveen.sriram@gmail.com on 22 Mar 2010 at 1:42

[GoogleCodeExporter]

After adding patch "cmockery-realloc-patch" 
(http://groups.google.com/group/cmockery/files), above issue got fixed. Thanks 
to 
"Eduardo Feo" for providing this patch.

Original comment by naveen.sriram@gmail.com on 24 Mar 2010 at 6:54