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RE: What is the proper way of printing the current date? Also bug report

From: Sven Axelsson
Subject: RE: What is the proper way of printing the current date? Also bug report
Date: Thu, 28 Jul 2005 15:20:36 +0200

> From: Han-Wen Nienhuys [mailto:address@hidden 
> Sent: den 28 juli 2005 14:39
> To: Sven Axelsson
> Cc: address@hidden; 'bug-lilypond'
> Subject: Re: What is the proper way of printing the current 
> date? Also bug report
> Sven Axelsson wrote:
> > I have been using
> > 
> > #(use-modules (srfi srfi-19))
> > today = #(date->string (current-date) "~B ~d, ~Y")
> > 
> > to get the current date so I can include that in the 
> tagline of my music.
> > 
> > This does cause the message
> > WARNING: #f: imported module (srfi srfi-19) overrides core binding
> > `current-time'
> > in the log, but it didn't seem to cause any problems.
> > 
> > This usually works great, but on one particular tune that uses many
> > 
> > \once \override Beam #'positions = #'(-2.5 . -3.0)
> > 
> > this would cause Lilypond to fail with the message
> > ERROR: Wrong type (expecting pair): ()
> > 
> > It was almost driving me crazy, since I thought the error 
> came from the
> > overrides themselves, using pairs and all. The really 
> strange thing is
> > that using a single beam override caused no error, using a 
> few printed
> > the error but still generated correct output, and using 
> even more would
> > cause Lilypond to generate no output at all.
> > 
> > Obviously this is caused by some strange Guile interactions 
> that I don't
> > understand. However, shouldn't there be a standard way of getting a
> > formatted date in Lilypond? Or maybe there is, and I just haven't 
> > found it yet.
> Quaint. Can you send a full bugreport?

It is even quainter. Running lilypond from the command prompt does
generate correct output and no Wrong type error. Doubleclicking the
*.ly file generates no output and a clean log, since warnings and
errors are printed on stderr and doesn't end up in that log file.
Using my Python build script that calls os.system() to run lilypond
also fails in the same way and shows the warning and error, since
I am redirecting both stdout and stderr to my log file.

This is with 2.6.1 Windows stand alone.

I don't think I can provide more information than this. Is there
a formal bug report format I should use?

Sven Axelsson

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