Confusion about macros.

[solo989]

This works. 
    
    
    import macros
    import typetraits
    
    macro t1() : untyped =
      return nnkStmtList.newTree(
        nnkDiscardStmt.newTree(
        newEmptyNode()
      )
      )
    
    t1()
    
    
    
    Run

But if I add: 
    
    
    macro t2(): untyped =
      result = t1()
    
    #t2()
    
    
    Run
    
    
    It breaks with the error message:
    Error: expression 'discard' has no type (or is ambiguous).
    Why can't I pass the result of one macro to another?
    I have a feeling I'm missing something fundamental here about how macros 
work.
    
    Even stranger if I comment out t1 and add discard.
    
    
    macro t1() : untyped =
      discard
      #return nnkStmtList.newTree(
      #  nnkDiscardStmt.newTree(
      # newEmptyNode()
     # )
      #)
    
    
    Run
    
    
    It gives the error not unused.