 coredumpctl gdb                                                                                            
           PID: 1625 (tracker-extract)
           UID: 1001 (june)
           GID: 1001 (june)
        Signal: 31 (SYS)
     Timestamp: Fri 2016-12-16 17:14:26 EST (42s ago)
  Command Line: /usr/lib/tracker/tracker-extract
    Executable: /usr/lib/tracker/tracker-extract
 Control Group: /
         Slice: -.slice
       Boot ID: 66188f13bdea480ea413892d24b58b28
    Machine ID: 11051830af9c49879a52cfb7a59e9fad
      Hostname: june-pc
       Storage: /var/lib/systemd/coredump/core.tracker-extract.1001.66188f13bdea480ea413892d24b58b28.1625.1481926466000000000000.lz4
       Message: Process 1625 (tracker-extract) of user 1001 dumped core.
                
                Stack trace of thread 1641:
                #0  0x00000000b7717ce5 __kernel_vsyscall (linux-gate.so.1)
                #1  0x00000000b7717c9c __vdso_gettimeofday (linux-gate.so.1)

GNU gdb (GDB) 7.12
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/lib/tracker/tracker-extract...(no debugging symbols found)...done.
[New LWP 1641]
[New LWP 1626]
[New LWP 1628]
[New LWP 1627]
[New LWP 1629]
[New LWP 1630]
[New LWP 1632]
[New LWP 1633]
[New LWP 1634]
[New LWP 1635]
[New LWP 1636]
[New LWP 1637]
[New LWP 1638]
[New LWP 1639]
[New LWP 1640]
[New LWP 1625]
[New LWP 1642]
[New LWP 1631]
[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 SIGSYS, Bad system call.
#0  0xb7717ce5 in __kernel_vsyscall ()
[Current thread is 1 (Thread 0xac350b40 (LWP 1641))]
(gdb) t a a bt

Thread 18 (Thread 0xb16fcb40 (LWP 1631)):
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: 
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  0xffffffff in 
Thread 17 (Thread 0xaba43b40 (LWP 1642)):
Python Exception <class 'SystemError'> <built-in function isinstance> returned a result with an error set: 
#0  0xffffffff in 
Thread 16 (Thread 0xb44b8940 (LWP 1625)):
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  0x0804f346 in main ()

Thread 15 (Thread 0xacef3b40 (LWP 1640)):
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 
Thread 14 (Thread 0xad6f4b40 (LWP 1639)):
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 
Thread 13 (Thread 0xadef5b40 (LWP 1638)):
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: 
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  0xffffffff in 
Thread 12 (Thread 0xae6f6b40 (LWP 1637)):
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: 
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  0xffffffff in 
Thread 11 (Thread 0xaeef7b40 (LWP 1636)):
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: 
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  0xffffffff in 
Thread 10 (Thread 0xaf6f8b40 (LWP 1635)):
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: 
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  0xffffffff in 
Thread 9 (Thread 0xafef9b40 (LWP 1634)):
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: 
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  0xffffffff in 
Thread 8 (Thread 0xb06fab40 (LWP 1633)):
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: 
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  0xffffffff in 
Thread 7 (Thread 0xb0efbb40 (LWP 1632)):
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: 
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  0xffffffff in 
Thread 6 (Thread 0xb1efdb40 (LWP 1630)):
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: 
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  0xffffffff in 
Thread 5 (Thread 0xb26feb40 (LWP 1629)):
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: 
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  0xffffffff in 
Thread 4 (Thread 0xb3a7bb40 (LWP 1627)):
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: 
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  0xffffffff in 
Thread 3 (Thread 0xb2effb40 (LWP 1628)):
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: 
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  0xffffffff in 
Thread 2 (Thread 0xb427cb40 (LWP 1626)):
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: 
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  0xffffffff in 
Thread 1 (Thread 0xac350b40 (LWP 1641)):
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: 
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  0xffffffff in #9  0x08050b7c in  ()
---Type <return> to continue, or q <return> to quit---
#10 0x08050c4b in  ()
#11 0x08050cb9 in  ()
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: 
#12 0xffffffff in #13 0xffffffff in #14 0xffffffff in (gdb) 

