#0  0x00007f58f0febd5f in QUrl::isEmpty() const ()
   from /usr/lib/libQtCore.so.4
No symbol table info available.
#1  0x00007f58f0338c02 in ?? () from /usr/lib/libnepomuk.so.4
No symbol table info available.
#2  0x00007f58f0338aee in ?? () from /usr/lib/libnepomuk.so.4
No symbol table info available.
#3  0x00007f58f033fd26 in ?? () from /usr/lib/libnepomuk.so.4
No symbol table info available.
#4  0x00007f58e6ca64d3 in ?? () from /usr/lib/kde4/nepomukfilewatch.so
No symbol table info available.
#5  0x00007f58f0f46775 in ?? () from /usr/lib/libQtCore.so.4
No symbol table info available.
#6  0x00007f58f0cb69ca in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#7  0x00007f58ef0bf6dd in clone () from /lib/libc.so.6
No symbol table info available.
#8  0x0000000000000000 in ?? ()
No symbol table info available.