Re: Tremolo and partcombiner: core dump (assertion failure)

[James Lowe]

Rutger,

On Sat, 10 Feb 2018 14:30:13 +0100, Rutger Hofman <address@hidden> wrote:

> Good afternoon list,
> 
> the following combination of \partcombine and \tremolo gives a core dump 
> with the following error message:
> 
> Preprocessing graphical objects...lilypond: 
> /home/gub/NewGub/gub/target/linux-64/src/lilypond-git.sv.gnu.org--lilypond.git-stable-2.20/flower/include/interval.hh:227:
>  
> T Interval_t<T>::center() const [with T = double]: Assertion `!is_empty 
> ()' failed.
> 
> If the % \partcombineApart below is uncommented, there is no core dump.
> 
> Lilypond:
> 
> \version "2.19.80"
> 
> upp = \relative c'' {
>      \repeat tremolo 32 { d64( b) } |
>      d1 |
>      b'1:64 |
> }
> 
> low = \relative c'' {
>      % \partcombineApart
>      b1 |
>      a1 |
>      g1:64 |
> }
> 
> \score {
>      <<
>          \new Staff \with {
>              instrumentName = "upp"
>          } <<
>              \upp
>          >>
>          \new Staff \with {
>              instrumentName = "low"
>          } <<
>              \low
>          >>
>          \new Staff \with {
>              instrumentName = "partcombined"
>          } <<
>              \partcombine
>                  \upp
>                  \low
>          >>
>      >>
> }
> 
> Rutger Hofman
> Amsterdam


Is this the same thing you reported a while back

e.g

Rutger Hofman said:

>>This is still an issue of current master ... has anybody investigated the 
>>problem ?

>I don't know whether we have an issue in the tracker for this, but it
>will always be an issue since there is no valid output for this input
>(I don't think one can have both a flag and a stem tremolo). Aborting
>with a core dump (and a cryptic message not obviously related to the
>input) is of course about the worst possible diagnostic, but we would
>not be able to produce valid graphics either.

>David Kastrup

I didn't notice if there was ever a bug filed for this.

James