status 1 error question

[Kieren MacMillan]

Hello all,

Until a few minutes ago, my score was compiling fine (2.19,46). Now I am 
getting the following error:

> /home/gub/NewGub/gub/target/darwin-x86/src/lilypond-git.sv.gnu.org--lilypond.git-release-unstable/flower/include/drul-array.hh:35:
>  failed assertion `d == 1 || d == -1’
> Exited with exit status 1.

The code

      | %  pFU 17-18
          \split
            { df'''4 ~ 16 g''( a'' bf'') c'''4 ~ 16 f''( bf'' c''') }
            { \pfLOne bf16 \pfUTwo f' df'' ef'' f''4 \pfLOne a16 \pfUTwo f' c'' 
df'' ef''4 }
          s1

[in which \split is a macro/shorthand for creating simultaneous voices, and the 
\pfX functions are shorthand for changing staves/voices, both of which are 
workhorses in my code and have not caused problems before] works just fine, 
whereas the code

      | %  pFU 17-18
          \split
            { df'''4 ~ 16 g''( a'' bf'') c'''4 ~ 16 f''( bf'' c''') }
            { \pfLOne bf16 \pfUTwo f' df'' ef'' f''4 \pfLOne a16 \pfUTwo f' c'' 
df'' ef''4 }
          \split
            { df'''4 ~ 16 bf''( c''' df''') ef'''8( df'''16 ef''' e''' ds''' 
e''' fs''') }
            { \pfLOne af16 \pfUTwo f' c'' df'' ef''4 \pfLOne g16 \pfUTwo f' bf' 
c'' fs' c'' cs'' ds'’ }

throws the error copied above.

Short of sending someone my very-non-M RWE [real world example] to work with on 
their own system, is there something I can do to chase down exactly what is 
causing this error?

Thanks,
Kieren.
________________________________

Kieren MacMillan, composer
‣ website: www.kierenmacmillan.info
‣ email: address@hidden