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Re: Crash with \repeat ... \alternative and \remove "Bar_engraver" on 2.

From: David Kastrup
Subject: Re: Crash with \repeat ... \alternative and \remove "Bar_engraver" on 2.17.26
Date: Sun, 17 Nov 2013 00:15:45 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux)

Cc and Reply-To to bug-lilypond

Jim Long <address@hidden> writes:

> I was researching a method for defining form (repeats, rehearsal
> marks, etc.) and line breaking in separate, hidden parallel staff
> contexts, and ran across the following crash:
> GNU LilyPond 2.17.26
> Processing `bug6-crash.ly'


> systems.../usr/local/share/lilypond/2.17.26/scm/bar-line.scm:913:28:
> In procedure ly:grob-array-length in expression (ly:grob-array-length
> bar-array):
> /usr/local/share/lilypond/2.17.26/scm/bar-line.scm:913:28: Wrong type
> argument in position 1 (expecting Grob_array): ()
> Can someone please determine whether the latest beta still does
> this, and if so, whether a bug report is warranted?
> The interaction appears to be between '\remove "Bar_engraver"' and
> the alternative ending.  Remove either one and the problem goes away.

What is this good for?  I'm debugging on this
<URL:http://code.google.com/p/lilypond/issues/detail?id=3663> and though
I've gotten the crash under control, my results are not identical to the
2.16 results.  I have a hard time deciding whether I should even care.

Can you spell out an actual application for this that did something
useful in 2.16?  What would the output look like for such a reasonable


David Kastrup

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