cubicweb #1893433 rql directive breaks if explicit view and empty rset [resolved]

using the rql directive for restructuredtext and giving a vid breaks if the rset is empty.

the rql_role() should be modified such that an empty rset is displayed with view noresult and return an error message if something breaks on the way.

prioritynormal
typebug
done in3.13.4
load left0.000
closed by#5430d0db52ab [web] rql directive breaks if explicit vid and empty rset (closes #1893433)