 coredumpctl gdb
           PID: 3257 (tracker-extract)
           UID: 1001 (june)
           GID: 1001 (june)
        Signal: 5 (TRAP)
     Timestamp: Fri 2016-12-16 17:31:18 EST (2min 20s ago)
  Command Line: /usr/lib/tracker/tracker-extract
    Executable: /usr/lib/tracker/tracker-extract
 Control Group: /user.slice/user-1001.slice/user@1001.service/tracker-extract.service
          Unit: user@1001.service
     User Unit: tracker-extract.service
         Slice: user-1001.slice
     Owner UID: 1001 (june)
       Boot ID: 66188f13bdea480ea413892d24b58b28
    Machine ID: 11051830af9c49879a52cfb7a59e9fad
      Hostname: june-pc
       Storage: /var/lib/systemd/coredump/core.tracker-extract.1001.66188f13bdea480ea413892d24b58b28.3257.1481927478000000000000.lz4
       Message: Process 3257 (tracker-extract) of user 1001 dumped core.
                
                Stack trace of thread 3257:
                #0  0x00000000b72dbc30 n/a (libglib-2.0.so.0)
                #1  0x00000000b72dcbc3 g_log_default_handler (libglib-2.0.so.0)
                #2  0x00000000b72dcf04 g_logv (libglib-2.0.so.0)
                #3  0x00000000b72dd0d5 g_log (libglib-2.0.so.0)
                #4  0x00000000b7582802 n/a (libgio-2.0.so.0)
                #5  0x00000000b73cef8a n/a (libgobject-2.0.so.0)
                #6  0x00000000b73d0c24 g_object_new_valist (libgobject-2.0.so.0)
                #7  0x00000000b73d0ca3 g_object_new (libgobject-2.0.so.0)
                #8  0x000000000804f874 tracker_config_new (tracker-extract)
                #9  0x000000000804ef75 main (tracker-extract)
                #10 0x00000000b70d1196 __libc_start_main (libc.so.6)
                #11 0x000000000804f3d7 _start (tracker-extract)

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Reading symbols from /usr/lib/tracker/tracker-extract...(no debugging symbols found)...done.
[New LWP 3257]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `/usr/lib/tracker/tracker-extract'.
Program terminated with signal SIGTRAP, Trace/breakpoint trap.
#0  0xb72dbc30 in ?? () from /usr/lib/libglib-2.0.so.0
(gdb) t a a bt

Thread 1 (Thread 0xb4562940 (LWP 3257)):
Python Exception <class 'SystemError'> <built-in function isinstance> returned a result with an error set: 
Python Exception <class 'SystemError'> <built-in function isinstance> returned a result with an error set: 
Python Exception <class 'SystemError'> <built-in function isinstance> returned a result with an error set: 
Python Exception <class 'SystemError'> <built-in function isinstance> returned a result with an error set: 
Python Exception <class 'SystemError'> <built-in function isinstance> returned a result with an error set: 
Python Exception <class 'SystemError'> <built-in function isinstance> returned a result with an error set: 
Python Exception <class 'SystemError'> <built-in function isinstance> returned a result with an error set: 
Python Exception <class 'SystemError'> <built-in function isinstance> returned a result with an error set: 
#0  0xffffffff in #1  0xffffffff in #2  0xffffffff in #3  0xffffffff in #4  0xffffffff in #5  0xffffffff in #6  0xffffffff in #7  0xffffffff in #8  0x0804f874 in tracker_config_new ()
#9  0x0804ef75 in main ()
(gdb) 

