Realloc() problem with Efence

[Alain Birtz]

What is wrong with this code ?
Code is executed correctly without Electric Fence
But linked with Efence library, dbg complaint:

   Electric Fence 2.0.5 Copyright (C) 1987-1998 Bruce Perens.
   ...
   ...
   Program received signal SIGSEGV, Segmentation fault.

when trying to write the first B, just after the first memory allocation
buffer
(at the instruction (*c_ptr++ = 'B'))


void tst ()
{
 int i;
 char *c_buf, *c_ptr, *temp_c_buf;

 c_buf = (char *)malloc(5000);
 if (c_buf != NULL)
  {
  c_ptr = c_buf;
  for (i = 0; i < 5000; i++)
   *c_ptr++ = 'A';
  temp_c_buf = c_buf;
  realloc(temp_c_buf, 5000 + 5000);
  if (temp_c_buf != NULL)
   {
   for (i = 0; i < 5000; i++)
    *c_ptr++ = 'B';
   }
  }
}




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