Error: No reasonable alternatives for expression Applying untyped: 
    Name: ?=?
...to: 
    Address of:
      Member Expression, with field: 
        i: signed int 
      from aggregate: 
        Applying untyped: 
            Name: *?
        ...to: 
            Variable Expression: _dst: pointer to instance of struct s2 
    Member Expression, with field: 
      i: signed int 
    from aggregate: 
      Variable Expression: _src: instance of struct s2 

Error: No reasonable alternatives for expression Applying untyped: 
    Name: ?=?
...to: 
    Address of:
      Member Expression, with field: 
        i: signed int 
      from aggregate: 
        Applying untyped: 
            Name: *?
        ...to: 
            Variable Expression: _dst: pointer to instance of struct s3 
    Member Expression, with field: 
      i: signed int 
    from aggregate: 
      Variable Expression: _src: instance of struct s3 

Error: No reasonable alternatives for expression Applying untyped: 
    Name: ?=?
...to: 
    Address of:
      Member Expression, with field: 
        i: signed int 
      from aggregate: 
        Applying untyped: 
            Name: *?
        ...to: 
            Variable Expression: _dst: pointer to instance of struct s4 
    Member Expression, with field: 
      i: signed int 
    from aggregate: 
      Variable Expression: _src: instance of struct s4