Puzzling compiler crash

[lou15b]

AST generated by the `refObjectDestructor` macro (obtained by inserting `echo 
treerepr(result)` at the end of the macro):
    
    
    ProcDef
      AccQuoted
        Ident "="
        Ident "destroy"
      Empty
      Empty
      FormalParams
        Empty
        IdentDefs
          Ident "x"
          Call
            Ident "typeof"
            BracketExpr
              Call
                Ident "Marker"
          Empty
      Empty
      Empty
      StmtList
        Call
          AccQuoted
            Ident "="
            Ident "destroy"
          DotExpr
            Ident "x"
            Ident "tref"
    
    
    Run

I then dumped the AST of the code that the macro was intended to generate:
    
    
    dumpTree:
        proc `=destroy`(x: typeof(Marker()[])) =
          `=destroy`(x.tref)
    
    
    Run

The resulting AST is:
    
    
    StmtList
      ProcDef
        AccQuoted
          Ident "="
          Ident "destroy"
        Empty
        Empty
        FormalParams
          Empty
          IdentDefs
            Ident "x"
            Call
              Ident "typeof"
              BracketExpr
                Call
                  Ident "Marker"
            Empty
        Empty
        Empty
        StmtList
          Call
            AccQuoted
              Ident "="
              Ident "destroy"
            DotExpr
              Ident "x"
              Ident "tref"
    
    
    Run

The only difference between the two is an enclosing `StmtList` node in the 
latter. I tried altering the `refObjectDestructor` macro to include the 
enclosing `StmtList`. It has no effect; the compiler still crashes.