⍝ ZZ21_Regression.tc
⍝ ----------------------------------

      )CLEAR
CLEAR WS

      ⍝ no editor command allowed for new function
      ⍝
      ∇foo[⎕]∇
DEFN ERROR+
      ∇foo[⎕]∇
             ^

      )FNS

      ⍝ prepend scalar
      ⍝
      4 ⎕CR '[',0 2⍴' '
┏→━━┓
⌽   ┃
┗━━━┛

⍝ ==================================

      )CHECK
OK      - no stale functions
OK      - no stale values
OK      - no stale indices
OK      - no duplicate parents

