---

** [issues:#5499] Temp. Staff not stopped when its length’s less than a fourth 
note**

**Status:** Accepted
**Created:** Thu Mar 21, 2019 11:20 PM UTC by Valentin Villenave
**Last Updated:** Thu Mar 21, 2019 11:20 PM UTC
**Owner:** nobody


When using a temporary Staff supposed to end when the music expression’s 
finished, that Staff actually won’t stopped *if* it contains a Voice whose 
length is anything less than a fourth note (no matter the time signature).
~~~~
\version "2.21.0"
<<
        { c'4
          \new Voice { c'8 }
          c'4 c'8 c'4 }
        { c'4 c'4 c'4 c'4 c'4 c'4 c'4 c'4 }
>>
~~~~
Or with `\\`:
~~~~
<<
        { c'4
          << { c'8 } \\ { c'8 } >>
          c'4 c'8 c'4 }
        { c'4 c'4 c'4 c'4 c'4 c'4 c'4 c'4 }
>>
~~~~
If the voices are of inequal length, only the shorter one triggers the bug:
~~~~
<<
        { c'4
          << { c'8 } \\ { c'4 } >>
          c'4 c'8 c'4 }
        { c'4 c'4 c'4 c'4 c'4 c'4 c'4 c'4 }
>>
~~~~
If using `\new Voice` rather than `\\`, the bug appears only when the  Voice 
explicitely created is the one whose length is less than a fourth note. In the 
following example, switching the `\new Voice` to the Voice with two eight notes 
(and leaving the other one just being implicitely created), fixes the bug:
~~~~
<<
  { c'4 <<
    \new Voice { \voiceTwo c'8 }
    { \voiceOne c'8 c' }
    >> c'4 c' }
  { c'1 c' }
>>
~~~~
Replacing the shortest voice with any duration of 4 and above (or padding it 
with skips or rests) prevents the bug from being triggered.

Someone else has been investigating this on -user-fr:
https://lists.gnu.org/archive/html/lilypond-user-fr/2019-03/msg00064.html

It could possibly be related with [#5378], but it’s clearly not the same bug.


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