A regression

[Richard Shann]

I have a file that fails to compile with 2.19.43 with this message

Starting lilypond 2.19.43 [junk.ly]...
Processing `/tmp/frescobaldi-PRgtuJ/tmpBD232F/junk.ly'
Parsing...
Interpreting music...[8][16][24][32]
Preprocessing graphical objects...
Interpreting music...[8][16][24][32]
Preprocessing graphical objects...
Interpreting music...[8][16][24]
Preprocessing graphical objects...
Interpreting music...[8][16][24][32][40][48]
Preprocessing graphical objects...
Interpreting music...
Preprocessing graphical objects...
Calculating line breaks... 
Drawing systems... 
Finding the ideal number of pages...
Fitting music on 4 or 5
pages...lilypond: 
/home/gub/NewGub/gub/target/linux-64/src/lilypond-git.sv.gnu.org--lilypond.git-release-unstable/lily/page-breaking.cc:1040:
 void Page_breaking::line_divisions_rec(vsize, const Line_division&, const 
Line_division&, Page_breaking::Line_division*): Assertion `my_index == 0' 
failed.
Exited with exit status 1.

(this happened after inserting a page break). It compiles ok with
2.18.2. My question is, would it be helpful to anyone to have the file?
(Obviously cutting it down to a minimal example is not an option). I
would have to paste the local includes in (or something) to construct
the non-minimal example, so I ask before doing the work...

Richard