Re: crash while processing lily-7d242e8d.ly

[Neil Puttock]

2009/4/30 Werner LEMBERG <address@hidden>:

> Interestingly,
>
>  lilypond -dbackend=eps lily-7d242e8d.ly
>
> works just fine.

Looks like you were trying to run the snippet with the lilypond-book
preamble included.

You should get the following error message,

The PostScript backend does not support the
system-by-system output.  For that, use the EPS backend instead,

  lilypond -dbackend=eps FILE

If have cut & pasted a lilypond fragment from a webpage, be sure
to only remove anything before

  %% ****************************************************************
  %% Start cut-&-pastable-section
  %% ****************************************************************

but calling ly:error doesn't work.

Here's a minimal example which also fails:

#(ly:error "foo")

If you format the string with arguments, it works fine:

#(ly:error "foo ~a" "bar")

Here's the source of the problem in general-scheme.cc:

  85 LY_DEFINE (ly_error, "ly:error",
  86            1, 0, 1, (SCM str, SCM rest),
  87            "A Scheme callable function to issue the error @var{str}."
  88            "  The error is formatted with @code{format} and @var{rest}.")
  89 {
  90   LY_ASSERT_TYPE (scm_is_string, str, 1);
>>91   if (scm_is_pair(scm_car(rest)))
  92     rest=scm_car(rest);

If REST is null, then scm_car fails.

>From this commit: bc41f1ab4e112d7a75f7d3feb62589124d283fec

One for Carl, methinks. :)

Regards,
Neil