Syntax error in function using structured name assignment

[Hans-Peter Sorge]

    Hi,
    
    
    just an experiment to see what can be done ...
    
    Works like a charm - mostly :-)
    
    ⍝ ------------------- an arbitrary function.
          ∇example[⎕]
        ∇
    [0]   Z←example name_struct
    [1]   Z← name_struct
    [2]   Z.N ← 'new'
    [3]   ⎕EX 'Z.K'
        ∇
    
    ⍝ ----------------- some data
          A.B.C.D ← 14
          A.B.C.K ← 20
    
    ⍝ ---------------- content of a
          A
    .B:
    .B.C:
    .B.C.D: 14
    
    .B.C.K: 20
    
    ⍝ ----------------- experiment 
          example A.B.C
      1   ⍝ ⎕EX
      
      ⍝ returned by Z:
      .D: 14
      
      .N: ┌→──┐    ⍝ line [2]
          │new│
          └───┘
       
    ⍝ ----------------- even this can be done
          V ← example A.B.C
      1 ⍝ ⎕EX
      
            V ≡ example A.B.C
      1 ⍝ ⎕EX
      1 ⍝ ≡
    
    
    ⍝ ---------------- here comes the bug:
          ∇example[⎕]∇
          ∇
      [0]   Z←example name_struct
      [1]   Z← name_struct
      [2]   Z.N ←'new'
      [3]   ⎕EX 'Z.K'
      [4]   Z.K ← 'NEW'
    
    ⍝ added line [4]
    
         example A.B.C
      1 ⍝ ⎕EX
      SYNTAX ERROR
        example[3]  Z.K←'NEW'
                       ^
            Z.K←'NEW' ⍝ does it immediately after syntax error 
            →3        ⍝ repeat from ⎕EX on
      1 ⍝ ⎕EX
      
      ⍝ returned by Z:
      .D: 14
      
      .K: ┌→──┐
          │NEW│
          └───┘
      
      .N: ┌→──┐
          │new│
          └───┘
      
      Best Regards
    Hans-Peter