#2829: Piraha lookup ref issue

Reporter: Steven R. Brandt Status: new Milestone: Version: Type: bug Priority: major Component: Cactus

Flesh: Currently, lookup_var returns a reference to the value of a var. When a unop is called, this has the effect of negating the value in the table. Thus:

``` $zip = 1 foo::xmin = -$zip foo::xmax = $zip ```

This results in both xmin and xmax being set to the same value (-1). The fix is to have lookup_var return a copy rather than a reference.

-- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2829/piraha-lookup-ref-...