libspf2 memory corruption (?)

Hi,

I am experiencing problems with libspf2. I have been trying various 
versions starting with libspf2 1.0.4, and so far every version I tried 
(up to the debian libspf 1.2.5.dfsg-4) is having the same problems.

In this case I'm trying with libspf 1.2.5.dfsg-4 (debian).

I have tried to contact the Debian maintainer for this package, but 
haven't received any reply. The RT bug thingie also seems to be broken, 
so I really hope some of you can help me out.

I am using this library like this:

  SPF_server_t *spf_server = SPF_server_new(SPF_DNS_CACHE, 0);
  SPF_request_t *spf_request = SPF_request_new(spf_server);
  SPF_response_t *spf_response = NULL;

But as soon as I initialize the server, memory gets corrupted:

[PC: 0xb7d478cc] (Thread 0) **FREE_NULL**

Freeing null pointer.

Stack trace where the error occurred:
                       realloc()  (interface)
      SPF_record_compile_macro()
            SPF_record_compile()
    SPF_server_set_localpolicy()
                SPF_server_new()
                          main()  autoreply.c, 116

**Memory corrupted.  Program may crash!!**

The above dump is from the binary debian package, below is the dump from 
the (debian) source package:

[spf_compile.c:107] (Thread 0) **FREE_NULL**
 >>                 *datap = realloc(*datap, size);

Freeing null pointer: *datap

Stack trace where the error occurred:
         SPF_c_ensure_capacity()  spf_compile.c, 107
                SPF_c_mech_add()  spf_compile.c, 831
            SPF_record_compile()  spf_compile.c, 1260
    SPF_server_set_localpolicy()  spf_server.c, 226
                SPF_server_new()  spf_server.c, 127
                          main()  autoreply.c, 116

**Memory corrupted.  Program may crash!!**

Most of the times my program survives, but sometimes my program does 
indeed crash after it does some memory operations, so I have the feeling 
my code checker (Insure++) is right and libspf2 is indeed trying to free 
a null pointer.

I was wondering if I am doing something wrong. If not, is this a known 
bug, and if so is there a fix available?

Please let me know if you need any additional information.

Sincerely yours,
Bas Verhoeven

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