Line break in beam including rests

[Niels]

Dear Lilypond-group,

I want to break after a bar.
In the first example this shown.
However, when a beam spans the break the 8th rest in example 2 causes a 
problem. How can I create a line break here?

Thanks for your help,
Niels

---
\version "2.19.35"

\paper {
  indent = 0
  ragged-right = ##t
}

notes={
  %First example
  %here the break works after the 8th rest
  r2. a8 r \break
  a r8 r2. \bar "|."

  \break % Go to the second example

  %First example
  %here the break does not work after the 8th rest
  r2. a8[ r \break
  a] r8 r2. \bar "|."}

\score{
  \new Staff
  \notes
  }
---