#0  0x00007f270eaf447c in librdf_hash_put () from /usr/lib/librdf.so.0
#1  0x00007f270eaf0ab2 in librdf_new_uri () from /usr/lib/librdf.so.0
#2  0x00007f270e65730e in raptor_namespaces_init ()
   from /usr/lib/libraptor.so.1
#3  0x00007f270e65746a in raptor_new_namespaces ()
   from /usr/lib/libraptor.so.1
#4  0x00007f270e8b9e8c in rasqal_new_query () from /usr/lib/librasqal.so.1
#5  0x00007f270eb07b66 in ?? () from /usr/lib/librdf.so.0
#6  0x00007f270eb05882 in librdf_new_query_from_factory ()
   from /usr/lib/librdf.so.0
#7  0x00007f270ed36653 in ?? ()
   from /usr/lib/soprano/libsoprano_redlandbackend.so
#8  0x00007f2715e6ec6d in Soprano::FilterModel::executeQuery ()
   from /usr/lib/libsoprano.so.4
#9  0x00007f270f27d53b in Soprano::Index::IndexFilterModel::rebuildIndex ()
   from /usr/lib/libsopranoindex.so.1
#10 0x00007f2717c0b392 in ?? () from /usr/lib/libQtCore.so.4
#11 0x00007f27145a53ba in start_thread () from /lib/libpthread.so.0
#12 0x00007f271518b0ad in clone () from /lib/libc.so.6
#13 0x0000000000000000 in ?? ()