[Jgeneral] Looks like a bug in ".

[Roger Stokes]

   NB.  Looks like there is a bug in ".
   
   foo =: 3 : 0
". 'z =. ', y
5!:6 < 'z'
)
   
   erase 'a' ; 'v'
1 1
   
   NB. this gives correct result
   
   foo 'a/'
a/
   
   NB. this gives incorrect reult
   
   foo 'v/'
|value error: v
|   z=.    v/
   
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