I have set up `backstrace_symbols` on my script using:

```
void handler(int sig) {
    void *array[20];
    size_t size;
    char **strings;
    size_t  i;

    size = backtrace(array, 20);
    strings = backtrace_symbols(array,size);

    tracelog.open("/var/log/safesquid/safesquid/debug/trace.log", ios::app);
    tracelog << sig << endl;
    for (i=0; i<size; i++)
        tracelog << strings[i] << endl;

    free(strings);

    exit(1);
}

```

In the main function, it is called it using

```
signal(SIGSEGV, handler);

```

**Backtrace:**

```
11
/opt/scripts/cplusconnector(_Z7handleri+0x2b) [0x40233b]
/lib64/libc.so.6(+0x32920) [0x7fe7b503c920]
/lib64/libc.so.6(+0x131b5f) [0x7fe7b513bb5f]
/opt/scripts/cplusconnector(main+0x163) [0x4035c3]
/lib64/libc.so.6(__libc_start_main+0xfd) [0x7fe7b5028cdd]
/opt/scripts/cplusconnector() [0x402199]
11
/opt/scripts/cplusconnector(_Z7handleri+0x2b) [0x40233b]
/lib64/libc.so.6(+0x32920) [0x7fd9db71a920]
/lib64/libc.so.6(+0x131b5f) [0x7fd9db819b5f]
/opt/scripts/cplusconnector(main+0x163) [0x4035c3]
/lib64/libc.so.6(__libc_start_main+0xfd) [0x7fd9db706cdd]
/opt/scripts/cplusconnector() [0x402199]

[root@server dev]# addr2line -e test-unstrippped 0x402199 0x7f1999f16cdd 0x4035c3
??:0
??:0
/usr/lib/gcc/x86_64-redhat-linux/4.4.6/../../../../include/c++/4.4.6/bits/basic_string.h:975

```

Where could the problem be and why does running the program result in a [segmentation fault](http://en.wikipedia.org/wiki/Segmentation_fault)?

**update:**

it was compiled using these options

```
g++ cplusconnector-k.cpp -g -rdynamic -O2 -I/usr/include/mysql -L/usr/lib/mysql -lmysqlcppconn -o test  `mysql_config --cflags --libs`

```

**update:**

i removed the optimization, and tried resolving the symbol using add2line from the backtrace, and it pointed to this line in code..

```
/opt/webcache/scripts/cplusconnector(_Z7handleri+0x25) [0x401d49]
/lib64/libc.so.6(+0x32920) [0x7f6ad974b920]
/lib64/libc.so.6(+0x131b5f) [0x7f6ad984ab5f]
/usr/lib64/libstdc++.so.6(_ZNSsaSEPKc+0x1c) [0x7f6ad9dcd12c]
/opt/webcache/scripts/cplusconnector(main+0x12b) [0x4027ae]
/lib64/libc.so.6(__libc_start_main+0xfd) [0x7f6ad9737cdd]
/opt/webcache/scripts/cplusconnector() [0x401c69]

[root@server dev]# addr2line -e test 0x401d49 0x7f6ad974b920 0x7f6ad984ab5f 0x7f6ad9dcd12c 0x4027ae 0x7f6ad9737cdd 0x401c69
/usr/local/dev/cplusconnector-k.cpp:42
??:0
??:0
??:0
/usr/local/dev/cplusconnector-k.cpp:138
??:0
??:0

```

line: 42 is outside the main function and is global:

```
ofstream httplog;

```

line:138 is inside the main function:

```
    if (std::string::npos != host.find(string("1.0.0.1"))){
          return 0;
       }

```

any ideas??