[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #5488 Proportional spacing bug: chained \noBreaks + \newSpacingSection

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[issues:#5488] Proportional spacing bug: chained \noBreaks + \newSpacingSection

Status: New
Created: Fri Mar 01, 2019 03:01 PM UTC by Palmer Ralph
Last Updated: Fri Mar 01, 2019 03:01 PM UTC
Owner: nobody
Attachments:

• correct-output.png (17.7 kB; image/png)
• no-break-spacing-bug.png (24.1 kB; image/png)

Trevor Bača wrote :

LilyPond incorrectly compresses consecutive, proportionally spaced measures
when the following conditions hold:

1. first measure in the sequence sets \proportionalNotationDuration; and
2. last measure in sequence is followed by \newSpacingSection; and
3. all measures in sequence carry \noBreak commands.

%%% BEGIN SPACING BUG %%%

\version "2.19.82"

\layout {
    indent = #0
    ragged-right = ##t
}

\new Staff
\with
{
    \remove Time_signature_engraver
}
{

    \time 2/8
    \set Score.proportionalNotationDuration = #(ly:make-moment 1 32)
    c'4
    ^ \markup \with-color #red "First three measures aren't wide enough"
    \noBreak

    c'4
    \noBreak

    c'4
    \noBreak

    \newSpacingSection
    c'4

    c'4

    c'4

    c'4

    c'4

}

%%% END %%%

Output looks like this:

[image: no-break-spacing-bug.png]

Correct output looks like this:

%%% BEGIN NON-BUG %%%

\version "2.19.82"

\layout {
    indent = #0
    ragged-right = ##t
}

\new Staff
\with
{
    \remove Time_signature_engraver
}
{

    \time 2/8
    \set Score.proportionalNotationDuration = #(ly:make-moment 1 32)
    c'4

    c'4

    c'4

    \newSpacingSection
    c'4

    c'4

    c'4

    c'4

    c'4

}

%%% END %%%

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