Test suit cannot fork process for debugging with clamav.

Hello All,

       I try to debugging test suite of  Clamav. Test suite writes for 
fork process in order to debug code. First step, Program started by 
libtools that declare the gdb debug tool. After run programs. It's 
represents error as below. I  debug "fork_setup()" function in the main 
function but show error SIGSEGV. It's show segmentation fault. How i can 
debug a source code in another way?  That's is source code of test suite 
for fork process[https://gist.github.com/2651305].

$ ./libtool --mode=execute gdb -q 
~/Clamav/unit_tests_checkfs/tests/.libs/check_cli_load
Reading symbols from 
/san01/home/chatsiri/workspacecpp/Clamav/unit_tests_checkfs/tests/.libs/check_cli_load...done.
(gdb) b 179
Breakpoint 1 at 0x401147: file check_cli_load.c, line 179.
(gdb) run check_cli_load
Starting program: 
/san01/home/chatsiri/workspacecpp/Clamav/unit_tests_checkfs/tests/.libs/check_cli_load 
check_cli_load
[Thread debugging using libthread_db enabled]

Breakpoint 1, main () at check_cli_load.c:180
warning: Source file is more recent than executable.
180         fork_setup();
(gdb) n
Running suite(s): matchers

Program received signal SIGSEGV, Segmentation fault.
0x000000392d879cb7 in strncmp () from /lib64/libc.so.6