Comment 2 for bug 841053

StacktraceTop:
 Xapian::Weight::Internal::accumulate_stats (this=0x7fff49da7f90, subdb=..., rset=...) at ../weight/weightinternal.cc:87
 LocalSubMatch::prepare_match (this=<optimized out>, nowait=<optimized out>, total_stats=<optimized out>) at ../matcher/localsubmatch.cc:51
 prepare_sub_matches (stats=..., errorhandler=0x0, leaves=...) at ../matcher/multimatch.cc:155
 MultiMatch::MultiMatch (this=0x7fff49da7ee0, db_=<optimized out>, query_=<optimized out>, qlen=0, omrset=<optimized out>, collapse_max_=<optimized out>, collapse_key_=4294967295, percent_cutoff_=0, weight_cutoff_=0, order_=Xapian::Enquire::ASCENDING, sort_key_=1, sort_by_=Xapian::Enquire::Internal::VAL, sort_value_forward_=true, errorhandler_=0x0, stats=..., weight_=0x3088760, matchspies_=..., have_sorter=false, have_mdecider=false) at ../matcher/multimatch.cc:283
 Xapian::Enquire::Internal::get_mset (this=0x30022d0, first=0, maxitems=1, check_at_least=1, rset=<optimized out>, mdecider=0x0, matchspy_legacy=0x0) at ../api/omenquire.cc:671