[GENERAL] view dependent on system view caused an upgrade to fail

I have the following function and view in my db:

create or replace function ${catalogSchema}.fn_show_pg_stat_activity() returns setof pg_catalog.pg_stat_activity as $$
select* from pg_catalog.pg_stat_activity; $$ language sql volatile security definer;  

create or replace view ${catalogSchema}.pg_stat_activity as select * from ${catalogSchema}.fn_show_pg_stat_activity();

During an upgrade from 9.5.4 to 9.6.1, the upgrade failed due to the error msg below: obviously the structure of
pg_catalog.pg_stat_activityhas changed between these 2 version.  
pg_restore: creating VIEW "rcmmaster.pg_stat_activity" pg_restore: [archiver (db)] Error while PROCESSING TOC:
pg_restore:[archiver (db)] Error from TOC entry 205; 1259 1995821 VIEW pg_stat_activity rcm_master_user pg_restore:
[archiver(db)] could not execute query: ERROR: column reference "query" is ambiguous 

My question: seems like pg_dump and pg_restore duirng the pg_upgrade actually used a hard-coded record/column set of
theold verison of pg_stat_activity, instead of just recompiling the function then the view after the system catalog
upgrade,so it would dynamically just retrieve the new column lists. Could this be considered a bug/defect? Is there any
wayto work around it w/o a postgresql fix?   

Thanks,
Patricia


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