Comment 2 for bug 762446

StacktraceTop:
 std::_Rb_tree<unsigned int, std::pair<unsigned int const, std::pair<char, unsigned int> >, std::_Select1st<std::pair<unsigned int const, std::pair<char, unsigned int> > >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, std::pair<char, unsigned int> > > >::_M_insert_unique_ (this=0x323ead8, __position=..., __v=...) at /usr/include/c++/4.5/bits/stl_tree.h:1226
 insert (this=0x30849e0, did=2000, tname=..., wdf=0) at /usr/include/c++/4.5/bits/stl_map.h:541
 operator[] (this=0x30849e0, did=2000, tname=..., wdf=0) at /usr/include/c++/4.5/bits/stl_map.h:451
 ChertWritableDatabase::insert_mod_plist (this=0x30849e0, did=2000, tname=..., wdf=0) at ../backends/chert/chert_database.cc:1098
 ChertWritableDatabase::add_document_ (this=0x30849e0, did=2000, document=...) at ../backends/chert/chert_database.cc:1167