re: problem with textspan for controlled aleatorism

[Stefan Thomas]

Dear community,
I think the snippet of my last example was too large, so probably nobody could see the basic problem that is:
How can I have a textspanner that ends with an arrow over a line break?
Here is a much shorter snipper to illustrate my problem:
\version "2.12.2"
\relative c'' {
  \override TextSpanner #'bound-padding = #1.0
  \override TextSpanner #'style = #'line
  \override TextSpanner #'(bound-details right arrow) = ##t
  \override TextSpanner #'bound-details #'left-broken #'text = ##f 
  \override TextSpanner #'bound-details #'right-broken #'text = ##f 
  \override TextSpanner #'(bound-details left text) = #"fof"
  \override TextSpanner #'(bound-details right text) = #"gag"
  \override TextSpanner #'(bound-details right padding) = #0.6
  \override TextSpanner #'(bound-details right stencil-align-dir-y) = #CENTER
  \override TextSpanner #'(bound-details left stencil-align-dir-y) = #CENTER
    
  a8\startTextSpan gis a4 b  b, \break
  g'4 c\stopTextSpan c2
}