\stopStaff at \break makes SpanBar disappear

[Trevor Bača]

Hi,

Stopping-and-restarting the staff at line break makes SpanBar disappear:

### BEGIN ###

\version "2.19.80"

\new Score <<
    \new StaffGroup <<
        \new Staff {
            c'1
            \break
            \stopStaff
            \once \override Staff.StaffSymbol.line-count = 3
            \startStaff
            c'1
        }
        \new Staff {
            c'1
            c'1
        }
        \new Staff {
            c'1
            c'1
        }
        \new Staff {
            c'1
            c'1
        }
    >>
>>

### END ###

Note that the problem appears to a fence-posting error: *the bug arises
only when stopping-and-restarting *the topmost staff* (as shown above) or
*the bottommost staff**; stopping-and-restarting any of the inner staves in
the staff group does not trigger the bug.

Thanks,

Trevor.

-- 
Trevor Bača
www.trevorbaca.com
soundcloud.com/trevorbaca

staff-restart-line-break-bug.png
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