title: What does the number at the end of each stacktrace line mean?
body: <p>I am examining some Xcode crash logs, and I was wondering the the number at the end of each line means:</p>
  
  <pre><code>0 Powercents 0x000781de testflight_backtrace + 142
  1 Powercents 0x00078d6c TFSignalHandler + 212
  2 libsystem_c.dylib 0x319937ec _sigtramp + 48
  3 libsystem_c.dylib 0x3198920e pthread_kill + 54
  4 libsystem_c.dylib 0x3198229e abort + 94
  5 AppSupport 0x35f70c2e abortAfterPassingIntegrityCheck + 38
  6 AppSupport 0x35f70ee6 runIntegrityCheckAndAbort + 526
  7 AppSupport 0x35f7102c checkResultWithStatement + 120
  8 AppSupport 0x35f72a12 _connectAndCheckVersion + 1058
  9 AppSupport 0x35f72ab6 CPSqliteDatabaseConnectionForWriting + 42
  10 AppSupport 0x35f72b8c CPSqliteDatabaseRegisterFunction + 20
  11 AddressBook 0x345523f6 ABCDBContextCreateWithPathAndAddressBook + 214
  12 AddressBook 0x34546428 ABCCreateAddressBookWithDatabaseDirectoryAndForceInProcessMigrationInProcessLinkingAndResetSortKeys + 232
  13 AddressBook 0x34554cd6 ABAddressBookCreate + 14
  14 TextInput 0x377981c4 _ZN2KB45fill_with_matchable_strings_from_address_bookERNS_7HashmapINS_6StringEbEE + 16
  15 TextInput 0x3779edf4 _ZN2KB21DynamicDictionaryImpl28background_load_address_bookERKNS_16StaticDictionaryE + 200
  16 TextInput 0x3779f72e _ZN2KBL14BackgroundLoadEPv + 278
  17 libsystem_c.dylib 0x3194a734 _pthread_start + 320
  18 libsystem_c.dylib 0x3194a5ef thread_start + 7
  </code></pre>