Lilypond crashes in Windows with Gregorian music

[Phil Holmes]

\include "gregorian.ly"
\score {
 <<
   \new VaticanaVoice = "cantus" {
     c'
   }
 >>
}

Windows Vista 64 bit.

Lilypond allocates memory like it's going out of fashion, getting to about a 
Gig after 14 seconds.  It then crashes.  The output is:

GNU LilyPond 2.14.2
Processing `D:/Music/BAMusic/Gregorian.ly'
Parsing...
D:/Music/BAMusic/gregorian.ly:1:9: error: out of dynamic memory in 
yy_create_buffer()
\include
        "gregorian.ly"

Crashes 2.12, 2.14 and 2.15.10 on my Windows system.

--
Phil Holmes