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Re: Unexpected version number behaviour

From: Cameron Horsburgh
Subject: Re: Unexpected version number behaviour
Date: Sat, 10 Jun 2006 20:49:58 +1000
User-agent: Mutt/1.5.11+cvs20060403

On Sat, Jun 10, 2006 at 01:44:49AM -0700, Graham Percival wrote:
> On 10-Jun-06, at 1:10 AM, Cameron Horsburgh wrote:
> >On Sat, Jun 10, 2006 at 12:51:27AM -0700, Graham Percival wrote:
> >
> >>\version "2.7.0"
> >>{ c'4}
> >>produces:
> >>
> >>error: Incorrect lilypond version: 2.7.0 (2.7.38, 2.9.8)
> >>error: Consider updating the input with the convert-ly script
> >>foo.ly: 0: warning: no \version statement found, please add
> >>
> >>\version "2.9.8"
> >That's weird. I just reran the same file and I got the error you have. 
> >The error I reported was cut-n-pasted from the compilation buffer, and 
> >I *swear* I'm not lying!
> >
> >Oh well, that's got to be the most efficient bug fix I've ever seen...
> Err, it's not really a bug fix.  It still claims that "no \version 
> statement found", which is incorrect.
> - Graham
It is if you consider the bug to be between the keyboard and the chair...

However, this suggests a problem with the way the version warnings are done. 
When I ran that file there was a syntax problem that filled my compilation 
buffer *between* the two error reports. This meant I missed the first one which 
is the one I needed to see.

Imagine a newbie compiling an older file. If syntax changes between the two 
versions cause the run to fail (like mine did) and they're left with a warning 
to add a version number, they might do that, which wouldn't fix anything. If 
they use their brains and change the existing number *no version related 
warnings will be printed at all.* The file would still fail, but any warnings 
that might help them figure out the source of their troubles no longer exist.

May I make a suggestion? If a file needs updating, the note to add a version 
number should be suppressed. This will ensure that the note to run convert-ly 
will always appear, and will (hopefully) be found and run.


Cameron Horsburgh



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