Re: Parallel statement: procedure returning string

[onde]

Here a slightly less artificial example.
    
    
    import random
    import strutils
    import threadpool
    
    {.experimental: "parallel".}
    
    proc genString(length: int): string =
      for i in 1..length:
        result.add(char(rand(int('a') .. int('z'))))
    
    proc genSentence(n: int): string =
      var ch = newSeq[string](n)
      #var ch = newSeq[FlowVar[string]](n)
      parallel:
        for k in 0..ch.high:
          let r = rand(3..9)
          ch[k] = spawn genString(r)
          #ch[k] = genString(r)
      #for k in 0..ch.high:
      #  result = result & ^ch[k]
      #  result = result & " "
      result = ch.join(" ")
    
    echo genSentence(10) & "."

The compilation error is:
    
    
    Error: type mismatch: got <FlowVar[system.string]> but expected 
'TaintedString = string'

The code works fine if I don't use parallel (but do use FlowVars and read with 
^)

Many thanks, Andreas