Re: [Lilypond-auto] Issue 3696 in lilypond: articulate.ly with \grace leaves \time in mid-measure, so bar checks fail

[lilypond]

Updates:
	Summary: articulate.ly with \grace leaves \time in mid-measure, so bar  
checks fail
        Cc: address@hidden
        Labels: -Regression

Comment #1 on issue 3696 by address@hidden: articulate.ly with \grace  
leaves \time in mid-measure, so bar checks fail
http://code.google.com/p/lilypond/issues/detail?id=3696

The warning happens because articulate.ly converts grace notes to normal  
notes, but leaves the \time before the ex-grace note, so it's no longer on  
a measure boundary. \time doesn't work properly in the middle of a measure  
— it ends up counting 5/4 from the beginning of the 3/4 measure, so  
naturally the bar check fails.

The warning doesn't happen in versions before 2.17.29 because articulate.ly  
puts the bar check at the beginning of a (redundant) SequentialMusic, where  
it was ignored (apparently this was issue 3610). The \time problem was  
present all along, but the warning was hidden by another bug, so it's not  
really a regression.

Here's a simpler test case that shows both problems without using  
articulate.ly:

{ \time 3/4 a2 \time 5/4 a1. {|} }

The nonsensical rendering is normal for articulate.ly, because it uses lots  
of scaled durations. The actual result (via \displayLilyMusic) is:

<< {
  \time 3/4
  { < f' >2.*7/8 < r >2.*7/80 }
  {  }
  \time 5/4
  { {  } { { < f' >8*63/320 < r >8*9/320 } } {  } }
  { < e' >1*7/8 < r >1*1/8 }
  { < e' >4*7/8 < r >4*1/8 }
  { | }
} >>

...which works fine in midi but not on the page.

The bar-check warning isn't wrong, but it is confusing. Maybe \time should  
warn if it's used in the middle of a measure?

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