Issue 540 in lilypond: programming error: 'cruelty to springs' and irregular spacing.

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Issue 540: programming error: 'cruelty to springs' and irregular spacing.
http://code.google.com/p/lilypond/issues/detail?id=540

Comment #12 by wbsoft:
Here is the backtrace:

address@hidden bugs $ gdb lilypond
GNU gdb 6.7.1
Copyright (C) 2007 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) b programming_error(std::string)
Breakpoint 1 at 0x82e9df9: file warn.cc, line 68.
(gdb) run --ps cruelty
Starting program: /usr/local/bin/lilypond --ps cruelty
[Thread debugging using libthread_db enabled]
[New Thread 0xb786b6d0 (LWP 5779)]
GNU LilyPond 2.11.41
Verwerken van `cruelty.ly'
Ontleden...
Vertolken van muziek...
Voorbewerken van grafische objecten...[Switching to Thread 0xb786b6d0 
(LWP 5779)]

Breakpoint 1, programming_error (address@hidden) at warn.cc:68
68        message (_f ("programming error: %s", s) + "\n");
(gdb) bt
#0  programming_error (address@hidden) at warn.cc:68
#1  0x0825cff5 in Spring::length (this=0x86fdd98, f=0.7896281102362207)
   at spring.cc:162
#2  0x0822d010 in Simple_spacer::solve (this=0xbfcdd0ec,
   line_len=99.584645669291319, ragged=false) at simple-spacer.cc:147
#3  0x0822e163 in get_line_forces (address@hidden,
   line_len=108.12047244094487, indent=8.5358267716535465, ragged=false)
   at simple-spacer.cc:435
#4  0x080af3cc in Constrained_breaking::initialize (this=0xbfcdd404)
   at constrained-breaking.cc:342
#5  0x080b0247 in Constrained_breaking (this=0xbfcdd404, ps=0x85df6b8,
   address@hidden) at constrained-breaking.cc:301
#6  0x081a9a6a in Page_breaking::find_chunks_and_breaks (this=0xbfcdd5ec,
   is_break=0x819f2e0 <is_break>) at page-breaking.cc:369
#7  0x081aa4cd in Page_breaking (this=0xbfcdd5ec, pb=0x8603d88,
   is_break=0x819f2e0 <is_break>) at page-breaking.cc:106
#8  0x0819f382 in Optimal_page_breaking (this=0xbfcdd5ec, pb=0x8603d88)
   at optimal-page-breaking.cc:28
#9  0x081b1125 in ly_optimal_breaking (pb=0xbfcdce48)
   at page-breaking-scheme.cc:31
#10 0xb7ecb105 in deval () from /usr/lib/libguile.so.17
#11 0xb7eccb20 in deval () from /usr/lib/libguile.so.17
#12 0xb7ec8f16 in scm_dapply () from /usr/lib/libguile.so.17
#13 0xb7ec90a5 in scm_apply () from /usr/lib/libguile.so.17
#14 0xb7ec9dbc in scm_apply_0 () from /usr/lib/libguile.so.17
#15 0x081c1a13 in Paper_book::pages (this=0x404) at paper-book.cc:504
---Type <return> to continue, or q <return> to quit---
#16 0x081c1b64 in Paper_book::output (this=0x8603d88,
   output_channel=0xb6cc17e0) at paper-book.cc:105
#17 0x08096317 in ly_book_process (book_smob=0xb7323c08,
   default_paper=0xb70430c8, default_layout=0xb719ffa8, output=0xb6cc17e0)
   at book-scheme.cc:56
#18 0xb7ee23e8 in scm_gsubr_apply () from /usr/lib/libguile.so.17
#19 0xb7ec8ca7 in scm_dapply () from /usr/lib/libguile.so.17
#20 0xb7ecc21e in deval () from /usr/lib/libguile.so.17
#21 0xb7ed0c3b in scm_primitive_eval () from /usr/lib/libguile.so.17
#22 0x081ce55f in ly_parse_scm (
    s=0x844a943 "(if (or (pair? toplevel-scores) 
output-empty-score-list)\n  ((if
(defined? 'default-toplevel-book-handler)\n    default-toplevel-book-handler\n
toplevel-book-handler)\n   parser\n   (apply ly:make-book "...,
   n=0xbfcdddd0, address@hidden, safe=false) at parse-scm.cc:124
#23 0x082cb184 in Lily_lexer::yylex (this=0x84bb558) at lexer.ll:340
#24 0x082d0b2e in yyparse (my_lily_parser=0x845f520) at parser.yy:2598
#25 0x0813c430 in Lily_parser::parse_file (this=0x845f520, address@hidden,
   address@hidden, address@hidden) at lily-parser.cc:114
#26 0x08141a91 in ly_parse_file (name=0xb6ce5e20) at lily-parser-scheme.cc:131
#27 0xb7ecb105 in deval () from /usr/lib/libguile.so.17
#28 0xb7ec8f16 in scm_dapply () from /usr/lib/libguile.so.17
#29 0xb7ec90a5 in scm_apply () from /usr/lib/libguile.so.17
#30 0xb7ecdd7d in scm_call_0 () from /usr/lib/libguile.so.17
#31 0xb7f299b0 in scm_body_thunk () from /usr/lib/libguile.so.17
#32 0xb7f29f85 in scm_c_catch () from /usr/lib/libguile.so.17
#33 0xb7f2a0d6 in scm_catch_with_pre_unwind_handler ()
---Type <return> to continue, or q <return> to quit---
  from /usr/lib/libguile.so.17
#34 0xb7ee23e8 in scm_gsubr_apply () from /usr/lib/libguile.so.17
#35 0xb7ec8ca7 in scm_dapply () from /usr/lib/libguile.so.17
#36 0xb7ecc21e in deval () from /usr/lib/libguile.so.17
#37 0xb7ecbde2 in deval () from /usr/lib/libguile.so.17
#38 0xb7ec8f16 in scm_dapply () from /usr/lib/libguile.so.17
#39 0xb7ec90a5 in scm_apply () from /usr/lib/libguile.so.17
#40 0xb7ecdd41 in scm_call_1 () from /usr/lib/libguile.so.17
#41 0xb7f75a44 in scm_srfi1_for_each ()
  from /usr/lib/libguile-srfi-srfi-1-v-3.so.3
#42 0xb7ecc19a in deval () from /usr/lib/libguile.so.17
#43 0xb7ecbde2 in deval () from /usr/lib/libguile.so.17
#44 0xb7eccb20 in deval () from /usr/lib/libguile.so.17
#45 0xb7ec8f16 in scm_dapply () from /usr/lib/libguile.so.17
#46 0xb7ec90a5 in scm_apply () from /usr/lib/libguile.so.17
#47 0xb7ecdd41 in scm_call_1 () from /usr/lib/libguile.so.17
#48 0x0815f96b in main_with_guile () at main.cc:402
#49 0xb7ee6916 in invoke_main_func () from /usr/lib/libguile.so.17
#50 0xb7eb8722 in c_body () from /usr/lib/libguile.so.17
#51 0xb7f29f85 in scm_c_catch () from /usr/lib/libguile.so.17
#52 0xb7eb8c82 in scm_i_with_continuation_barrier ()
  from /usr/lib/libguile.so.17
#53 0xb7eb8d63 in scm_c_with_continuation_barrier ()
  from /usr/lib/libguile.so.17
#54 0xb7f29109 in scm_i_with_guile_and_parent () from /usr/lib/libguile.so.17
#55 0xb7f291fe in scm_with_guile () from /usr/lib/libguile.so.17
---Type <return> to continue, or q <return> to quit---
#56 0xb7ee68af in scm_boot_guile () from /usr/lib/libguile.so.17
#57 0x0815dfbb in main (argc=3, argv=0xbfce0954, envp=Cannot access 
memory at
address 0x8
) at main.cc:597
(gdb)




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