2.9.21: guile stack overflow

[John Mandereau]

Hi,
when compiling a two-staves score, I get a stack overflow with LilyPond
2.9.21 (GUB for x86 Linux), as well as with all versions starting from
about 2.9.14 (compiled from CVS with GPL-GS 8.51 and Guile 1.8.0 on
Fedora Core 5), whereas it compiles fine with Lily 2.8.x.

I didn't reported it before because I wasn't able to reduce the file to
a minimal example, which may be not surprising for this kind of bug: if
I remove one of the two staves, or if I remove a few bars (6 at the
begining, or 15 at the end or in the middle), there is no more stack
overflow, so it seems to be triggered by a big amount of layout objects,
not by some objects in particular. But now I see 2.10 will be released
soon, there is still this bug.

The score is not so big (19 KB source, 90 bars, and 6 pages of output in
2.8), and it heavily uses embeddded postscript, special noteheads,
glissandos and compound time signatures.

Here's the end of the output I got with Lily 2.9.21 with --ps --verbose
flags:


Preprocessing graphical objects...
Grob count 24[sans_bold_2.458984375]
Calculating line breaks...
Drawing systems...
Element count 19.[0]Backtrace:
In 
/home/lilydevel/lilypond/usr/bin/../share/lilypond/current/scm/define-grobs.scm:
2040: 171  (let* (# #) (if # normal-callback #))
     ...
2047: 172  [ly:hara-kiri-group-spanner::pure-height # 488 494]
In unknown file:
   ?: 173* [pure-Y-offset #<Grob RehearsalMark > 542 548]
In 
/home/lilydevel/lilypond/usr/bin/../share/lilypond/current/scm/define-grobs.scm:
2055: 174* [pure-conversion (#) (#) Y-offset ...]
2040: 175  (let* (# #) (if # normal-callback #))
     ...
2047: 176  [ly:side-position-interface::pure-y-aligned-side # 542 548]
In unknown file:
   ?: 177* [pure-Y-extent #<Grob VerticalAxisGroup > 542 548]
In 
/home/lilydevel/lilypond/usr/bin/../share/lilypond/current/scm/define-grobs.scm:
2051: 178* [pure-conversion (#) (# # # # ...) Y-extent ...]
2040: 179  (let* (# #) (if # normal-callback #))
     ...
2047: 180  [ly:hara-kiri-group-spanner::pure-height # 542 548]
In unknown file:
   ?: 181* [pure-Y-offset #<Grob DynamicLineSpanner > 20 36]
In 
/home/lilydevel/lilypond/usr/bin/../share/lilypond/current/scm/define-grobs.scm:
2055: 182* [pure-conversion (#) (#) Y-offset ...]
2040: 183  (let* (# #) (if # normal-callback #))
     ...
2047: 184  [ly:side-position-interface::pure-y-aligned-side # 20 36]
In unknown file:
   ?: 185* [pure-Y-extent #<Grob NoteColumn > 20 36]
In 
/home/lilydevel/lilypond/usr/bin/../share/lilypond/current/scm/define-grobs.scm:
2051: 186* [pure-conversion (#) (# # # # ...) Y-extent ...]
2040: 187  (let* (# #) (if # normal-callback #))
     ...
2044: 188  (if (pair? (assq normal-callback pures)) (normal-callback
grob) ...)
2044: 189* [pair? ...
2044: 190*  (assq normal-callback pures)

/home/lilydevel/lilypond/usr/bin/../share/lilypond/current/scm/define-grobs.scm:2044:20:
 In expression (assq normal-callback pures):
/home/lilydevel/lilypond/usr/bin/../share/lilypond/current/scm/define-grobs.scm:2044:20:
 Stack overflow


I don't want to send the whole file on the list because it is too
copyrighted, but I can send it privately on request from the developers.

HTH,
-- 
John Mandereau <address@hidden>