Articulate script plus grace notes following multiple voices results in timing errors

[David Baptista]

Good morning,

I have found a bug regarding the use of the articulate script plus grace
notes following the use of multiple voices. The following snippet
successfully reproduces the bug on both the latest stable and unstable
release:

\include "articulate.ly"

music =
{
\time 2/4
<< { c''2 } \\ { c'2 } >>
\grace c'16 c'2
}

\score{
\music
\layout{}
}

\score{
\articulate \music
\layout{}
}

I have also saved this snippet in Lilybin for convenience:
http://lilybin.com/97o636/1

As can be seen on the output, this particular combination of features
results in extra time being erroneously added to the score. If I remove
either the grace note, do not use articulate, or do not use multiple voices
immediately preceding the grace note, the bug does not occur.

Let me also use this opportunity to thank all Lilypond developers for all
the work on such a great typesetting software, I started using Lilypond
gradually and now use it exclusively for all my scores, having used it for
150+ pages orchestral scores. No other software compares!

Best regards,
David Baptista