#0  0x00007f28392bc759 in ChertTable::form_key(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const () from /usr/lib/libxapian.so.22
No symbol table info available.
#1  0x00007f28392c20d9 in ChertTable::get_exact_entry(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&) const () from /usr/lib/libxapian.so.22
No symbol table info available.
#2  0x00007f28392aedb6 in ?? () from /usr/lib/libxapian.so.22
No symbol table info available.
#3  0x00007f28392b3e23 in ?? () from /usr/lib/libxapian.so.22
No symbol table info available.
#4  0x00007f283929f7aa in ?? () from /usr/lib/libxapian.so.22
No symbol table info available.
#5  0x00007f283929f991 in ?? () from /usr/lib/libxapian.so.22
No symbol table info available.
#6  0x00007f28396222a9 in ?? () from /usr/lib/python2.7/dist-packages/xapian/_xapian.so
No symbol table info available.
#7  0x000000000049b3a8 in PyEval_EvalFrameEx ()
No symbol table info available.
#8  0x000000000049d325 in PyEval_EvalCodeEx ()
No symbol table info available.
#9  0x00000000004c46f8 in ?? ()
No symbol table info available.
#10 0x000000000045d864 in PyObject_Call ()
No symbol table info available.
#11 0x0000000000498461 in PyEval_EvalFrameEx ()
No symbol table info available.
#12 0x0000000000496dbf in PyEval_EvalFrameEx ()
No symbol table info available.
#13 0x0000000000496dbf in PyEval_EvalFrameEx ()
No symbol table info available.
#14 0x000000000049d325 in PyEval_EvalCodeEx ()
No symbol table info available.
#15 0x00000000004c4526 in ?? ()
No symbol table info available.
#16 0x000000000045d864 in PyObject_Call ()
No symbol table info available.
#17 0x000000000045f43f in ?? ()
No symbol table info available.
#18 0x000000000045d864 in PyObject_Call ()
No symbol table info available.
#19 0x0000000000495d46 in PyEval_CallObjectWithKeywords ()
No symbol table info available.
#20 0x00000000005046f2 in ?? ()
No symbol table info available.
#21 0x00007f283dac2d8c in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#22 0x00007f283c98804d in clone () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#23 0x0000000000000000 in ?? ()
No symbol table info available.