#0  0xb7c0ae02 in std::_Rb_tree_increment () from /usr/lib/libstdc++.so.6
#1  0xb7c0ae5d in std::_Rb_tree_increment () from /usr/lib/libstdc++.so.6
#2  0xb76bce4b in ?? () from /usr/lib/libxapian.so.15
#3  0xb76d2324 in Xapian::TermIterator::operator++ ()
   from /usr/lib/libxapian.so.15
#4  0xb76e61f3 in ?? () from /usr/lib/libxapian.so.15
#5  0xb76e8a44 in ?? () from /usr/lib/libxapian.so.15
#6  0xb76b60ea in Xapian::WritableDatabase::add_document ()
   from /usr/lib/libxapian.so.15
#7  0xb7806018 in ?? () from /usr/lib/python2.6/dist-packages/_xapian.so
#8  0x0806111a in PyObject_Call ()
#9  0x080dcfea in PyEval_EvalFrameEx ()
#10 0x080df587 in PyEval_EvalFrameEx ()
#11 0x080e00b8 in PyEval_EvalCodeEx ()
#12 0x080e0217 in PyEval_EvalCode ()
#13 0x080fe0e1 in PyRun_FileExFlags ()
#14 0x080fe43a in PyRun_SimpleFileExFlags ()
#15 0x0805c882 in Py_Main ()
#16 0x0805b972 in main ()