In my app i got crash report 

```
Exception Type:  EXC_BAD_ACCESS (SIGBUS)

Exception Codes: KERN_PROTECTION_FAILURE at 0x00000000

Crashed Thread:  7

In Thread 7 :

Thread 7 Crashed:

0   CoreFoundation                  0x3728ba96 0x37278000 + 80534

1   CFNetwork                       0x36617b84 0x36616000 + 7044

2   CFNetwork                       0x36617af6 0x36616000 + 6902

3   MusicBandApp                    0x0000bbfc 0x1000 + 44028

4   MusicBandApp                    0x0000b740 0x1000 + 42816

5   Foundation                      0x33b88382 0x33b6b000 + 119682

6   Foundation                      0x33bfa5c6 0x33b6b000 + 587206

7   libsystem_c.dylib               0x3579530a 0x35762000 + 209674

8   libsystem_c.dylib               0x35796bb4 0x35762000 + 215988

```

but can"t show particular crash file name & line number.

How can sybolicate this crash report.