Comment #5 on issue 3792 by [email protected]: v2.19: \time change under
\alternative triggers bug
http://code.google.com/p/lilypond/issues/detail?id=3792
The two regression tests seem to have been written to test different
aspects of repeats, and without considering exactly how the measures should
be counted. With this change, repeat-volta.ly and repeat-unfold-all.ly
should be revised.
I do not see any need to maintain the particular consistency mentioned in
comment #4.
(One would expect, though, that after the last alternative, the measure
position comes out the same whether the music is unfolded or repeated.)
Almost always, the repeated portion (length of the \repeat plus any one
\alternative except the final) will be an integral number of measures, even
if the repeat begins and ends mid-measure, or if the time signature
changes. If a user goes outside that convention, I do not see a way to
guess the expected behavior.
So 'repeat-volta.ly' could be in 3/4, or maybe just re-written. The
repeated section in 'repeat-unfold-all.ly' is 1/2 so that test would be
fine in 4/4 time --- except that the whole motif is 5/4 long; adding a
rests to complete a measure before the || would make it less confusing.
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