Re: Omitting the destination on a call to format is deprecated. Pass #f as the destination, before the format string.

[Valentin Petzel]

Hello Federico,

Lilypond with Guile 1.8 used a less capable version of the format command that 
did not feature a destination argument (the default simple-format of Guile). 
With Guile 2  Lilypond uses the full, powerful ice9 format (as can be seen 
using #(display format)).

ice9 format takes a destination argument as first argument. This one can be any 
output port, #t for the current output port (i.e. you print the result) or #f 
to return the result.

If we omit this destination argument format will handle it as #f but pass this 
warning.

Now these messages you get should either come from
A) The score itself using format
B) The score using a function that uses format

I’ve grepped through the current git master sources and all occurances of 
format do specify a port. This means that most likely you are using some 
custom scheme functions or libraries that use format. To fix these warnings 
replace all occurrances of (format string ...) by (format #f string ...) in 
such files.

Cheers,
Valentin

Am Samstag, 29. Oktober 2022, 00:06:03 CEST schrieb Federico Bruni:
> Sorry for the long subject.
> 
> I see some of my scores return this message:
> 
>   Omitting the destination on a call to format is deprecated.
>   Pass #f as the destination, before the format string.
> 
> I have no idea of what could trigger it and I was not able to make a
> minimal example.
> I can share privately a score to anybody interested in debugging this
> message.
> 
> I found a discussion about this message between Harm and David K six
> years ago:
> https://lists.gnu.org/archive/html/lilypond-user/2016-11/msg00966.html
> 
> I'm running LilyPond 2.23.80 (Guile 2), official binaries.

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