Curves, \remove "Staff_symbol_engraver" and bar-size

[Marco Caliari]

> I'm not top posting.

Dear all,

in the following snippet 

\version "2.11.56"
\paper{ ragged-right=##t }
\score {
\relative c '' {e2 ~ e
                e2( d)
}
  \layout {
    \context {
      \Staff
      \remove "Staff_symbol_engraver"
      \override BarLine #'bar-size = #4
    }
  }
}

the tie and the slur are completely wrong. Everything is fine if you comment
either \remove "Staff_symbol_engraver" or \override Barline #'bar-size = #4

Best regards,

Marco