Issue 1914 in lilypond: Manual page break in a user defined variable

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Ugly Warning

New issue 1914 by brownian.box: Manual page break in a user defined variable
http://code.google.com/p/lilypond/issues/detail?id=1914

Reported by Ed Gordijn,
http://lists.gnu.org/archive/html/bug-lilypond/2011-09/msg00667.html :

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This is related to http://code.google.com/p/lilypond/issues/detail?id=1903
The alternative that is suggested in 1903 doesn't work when you use a  
variable for the pageBreak.

See also  
http://lists.gnu.org/archive/html/lilypond-user/2011-09/msg00263.html

\version "2.15.12"

mvtI   = { c'4 c' c' c' }
mvtII  = { d'4 d' d' d' }
myPageBreak = \pageBreak


\score {
   \new Staff { \mvtI }
   \header { piece = "Page 1"}
}

\myPageBreak

\score {
   \new Staff { \mvtII }
   \header { piece = "Should be page 2"}
}
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Compiling this code also gives somewhat misleading message:
././test.ly:15:0: error: syntax error, unexpected \score, expecting  
\addlyrics

while 2.12.3 gives this message:
././test.ly:13:0: error: syntax error, unexpected MUSIC_IDENTIFIER