[Bug-apl] Quad-IO localization problem

[Blake McBride]

      )CLEAR
CLEAR WS
      ⎕IO
1
      'abc'⍳'a'
1
      ∇test;⎕IO
[1] ⎕IO←0
[2] ∇
      test
      ⎕IO
1
      'abc'⍳'a'
0


Although ⎕IO seems to be correct, the iota lookup shows that the wrong ⎕IO
value is being used.

Blake