\spanrequest crashes lily

[Simon Bailey]

forgot to add, i'm using lily-1.6.3. compiled from source ...

<<<
hi,

the following fragment will crash lilypond everytime:

\score { 
  \notes {
    \key b \major
    \property Voice.TextSpanner \set #'type = #'trill
    \property Voice.TextSpanner \set #'edge-height = #'(0 . 2)
    \property Voice.TextSpanner \set #'edge-text = #'((line (music
"scripts-trill") " ") . "")

    <b1 {s8\spanrequest \start "text" s8 s2 s8 s8\spanrequest \stop
"text"}>
  }
}

if i don't use spacer notes, then it will work. it used to work in 1.5.*
-- i arranged a piece w/lily using spacer notes and a trill TextSpanner.

i assume i could get around it by making the notes in the secondary
voice transparent, but using spacer notes would be easier.

any ideas?

greetings,
simon.
>>>
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