Dereference of potentially null field

If the field is actually null, then a null pointer dereference will occur. Field, which is statistically checked against null, is dereferenced.
/src/mongo/db/exec/sbe/stages/hashagg_base.cpp:210: NULL_FIELD 177478 Reading field "_recordStore", which is expected to possibly be "nullptr" in "this->_recordStore" (checked 10 out of 12 times).
/src/mongo/db/exec/sbe/stages/hashagg_base.cpp:210: NULL_FIELD 177478 Attempting to access the managed object of an empty smart pointer "this->_recordStore".