Unchecked return value

If the function returns an error value, the error value may be mistaken for a normal value. Value returned from a function is not checked for errors before being used.
/src/mongo/db/exec/agg/change_stream_handle_topology_change_v2_stage.cpp:196: CHECKED_RETURN 177407 Calling "erase" without checking return value (as is done elsewhere 10 out of 11 times).