Slurs in barless music

[Don Blaheta]

This is a problem I've been banging on for a while now, but this time
I've been able to narrow it down.  It seems that if the Bar_engraver is
removed, Lilypond runs into problems rendering that span lines.  The
following code renders fine:

  \version "2.7.33"
  \score {
    \new Voice \relative c' {
      e f g a(
      \break
      e) f g a
    }
    \layout {
      \context {
        \Staff
        %\remove "Bar_engraver"
      }
    }
  }

but if you uncomment that line, it will spit out a bunch of error
messages ("programming error: slur attachment is inf/nan; continuing,
cross fingers") and render the slur totally wrong.  Is this me not
understanding what Bar_engraver is supposed to be doing, or is it a bug?

-- 
-=-Don address@hidden<http://www.blahedo.org/>-=-
"Genes don't say "eek!"  They mostly just sit there and be transcribed."
                                                --David Singleton