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Re: 2.15.41 Regtests

From: David Kastrup
Subject: Re: 2.15.41 Regtests
Date: Sun, 08 Jul 2012 18:03:37 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1.50 (gnu/linux)

"Phil Holmes" <address@hidden> writes:

> I've been doing a bit of work with my pixel comparator, and now have a
> mechanism to generate a web page from commented results.  Running the
> checker on 15.41 versus 15.40 gives about 100 changed files, most of
> which are subtle changes, some of which come from a changed forte
> mark.  I've got a web page with what I believe are significant
> changes.  Its address is:
> Please look at it and see if these are intended changes.

Responsible likely

commit 16a328617e867892e8d5608f95bd6127196e03a2
Author: Keith OHara <address@hidden>
Date:   Sun Jun 17 21:45:26 2012 -0700

    Consistent bounds for slurs; issue 427 and 379

commit 619997f335c96cb3720f486650fd284906c90b83
Author: Keith OHara <address@hidden>
Date:   Sun Jun 17 21:43:54 2012 -0700

    phrasing-slur: avoid key-sigs, clefs; issue 49

commit ad0e41c6cd25db2643d1a3e25242d284d6f65e69
Author: Mike Solomon <address@hidden>
Date:   Fri Jun 15 08:37:47 2012 +0200

    Forbids slur and tie extrema points from getting to close.

for the slurs.  There is no commit message that would explain the
shortened stems like in


but it is easy to verify that the following commit is responsible:

commit 30f2bb655e6f240a795af9f52c1476849b378ead
Author: Mike Solomon <address@hidden>
Date:   Fri Jun 15 08:27:17 2012 +0200

    Gives stencilless unbeamed stems an empty Y-extent.

It is obvious that LilyPond's idea of "stencilless" is different from
Mike's since I verified that

    If there is a beam but no stem, slope calculations depend on this
    routine to return where the stem end /would/ be.
  if (!beam && !unsmob_stencil (me->get_property ("stencil")))
    return Interval ();

in lily/ is responsible for the regression.

David Kastrup

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