Merge pull request #29785 from cswilliams/rescue_postgres_connection_errors_on_dealloc

Catch postgres connection errors when trying to dealloc

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -184,6 +184,7 @@ def []=(sql, key)
 
           def dealloc(key)
             @connection.query "DEALLOCATE #{key}" if connection_active?
+          rescue PG::Error
           end
 
           def connection_active?