Re: no solution found for Bezier intersection

[David Kastrup]

Thomas Morley <address@hidden> writes:

> 2018-07-01 21:13 GMT+02:00 David Kastrup <address@hidden>:
>
>> Perhaps try running under a debugger and setting a breakpoint on
>> ::warning (or so)?  Then make a traceback when the warning is reached
>> (hopefully from the right point).
>
> Well, I don't know what I should do. I never did something like this.
>
> But I tried:
>
> gdb lilypond/usr/bin/lilypond
> [...]
> (gdb) break ::error
> Breakpoint 1 at 0x7ffff5b20390: file error.c, line 294.
> (gdb) run file-bug.ly
> [...]
> (gdb) bt
> No stack.
>
>
> Probably I did it not correctly.

It's programming_error actually.

address@hidden:/usr/local/tmp/lilypond$ cd /tmp
address@hidden:/tmp$ gdb /usr/local/tmp/lilypond/out/bin/lilypond
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Reading symbols from /usr/local/tmp/lilypond/out/bin/lilypond...done.
(gdb) break programming_error
Breakpoint 1 at 0xc9880: programming_error. (3 locations)
(gdb) run /tmp/harm.ly
Starting program: /usr/local/tmp/lilypond/out/bin/lilypond /tmp/harm.ly
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
GNU LilyPond 2.21.0
Processing `/tmp/harm.ly'
Parsing...
Interpreting music...[8][16]
Preprocessing graphical objects...
Finding the ideal number of pages...
Fitting music on 1 page...
Drawing systems...
Breakpoint 1, programming_error (s="no solution found for Bezier intersection", 
location="") at warn.cc:190
190     {
(gdb) bt
#0  0x0000555555923ed0 in programming_error(std::__cxx11::basic_string<char, 
std::char_traits<char>, std::allocator<char> > const&, 
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > 
const&) (s="no solution found for Bezier intersection", location="") at 
warn.cc:190
#1  0x0000555555757968 in Bezier::get_other_coordinate(Axis, double) const 
(address@hidden, address@hidden, address@hidden) at bezier.cc:72
#2  0x00005555557c576c in 
Slur_configuration::score_extra_encompass(Slur_score_state const&) 
(this=0x5555562fb5e0, state=...) at slur-configuration.cc:411
#3  0x00005555557c6085 in Slur_configuration::run_next_scorer(Slur_score_state 
const&) (this=0x5555562fb5e0, state=...) at slur-configuration.cc:522
#4  0x000055555576e1ab in Slur_score_state::get_best_curve() const 
(address@hidden) at slur-scoring.cc:427
#5  0x000055555576e406 in Slur::calc_control_points(scm_unused_struct*) 
(smob=<optimized out>) at slur-scoring.cc:363
#6  0x00007ffff7b1fb62 in scm_dapply (proc=0x7ffff3c03740, arg1=0x7ffff01c1210, 
args=0x404) at eval.c:4895
#7  0x000055555567e25d in Grob::try_callback_on_alist(scm_unused_struct**, 
scm_unused_struct*, scm_unused_struct*) (proc=0x7ffff3c03740, 
sym=0x7ffff2013c60, alist=0x55555611cd60, this=0x55555611cd00) at 
grob-property.cc:232
#8  0x000055555567e25d in Grob::internal_get_property(scm_unused_struct*) const 
(sym=<optimized out>, this=<optimized out>) at grob-property.cc:184
#9  0x000055555567e25d in Grob::internal_get_pure_property(scm_unused_struct*, 
int, int) const (end=<optimized out>, start=<optimized out>, sym=<optimized 
out>, this=<optimized out>)
    at grob-property.cc:201
#10 0x000055555567e25d in 
Grob::internal_get_maybe_pure_property(scm_unused_struct*, bool, int, int) 
const (this=<optimized out>, sym=<optimized out>, pure=<optimized out>, 
start=<optimized out>, end=<optimized out>) at grob-property.cc:212
#11 0x0000555555624c1c in Slur::get_curve(Grob*) (me=0x55555611cd00) at 
slur.cc:231
#12 0x0000555555624c1c in Slur::print(scm_unused_struct*) (smob=<optimized 
out>) at slur.cc:162
#13 0x00007ffff7b1fb62 in scm_dapply (proc=0x7ffff3b309c0, arg1=0x7ffff01c1210, 
args=0x404) at eval.c:4895
#14 0x000055555567e25d in Grob::try_callback_on_alist(scm_unused_struct**, 
scm_unused_struct*, scm_unused_struct*) (proc=0x7ffff3b309c0, 
sym=0x7ffff328ae40, alist=0x55555611cd60, this=0x55555611cd00) at 
grob-property.cc:232
#15 0x000055555567e25d in Grob::internal_get_property(scm_unused_struct*) const 
(sym=<optimized out>, this=<optimized out>) at grob-property.cc:184
#16 0x000055555567e25d in Grob::internal_get_pure_property(scm_unused_struct*, 
int, int) const (end=<optimized out>, start=<optimized out>, sym=<optimized 
out>, this=<optimized out>)
    at grob-property.cc:201
#17 0x000055555567e25d in 
Grob::internal_get_maybe_pure_property(scm_unused_struct*, bool, int, int) 
const (this=<optimized out>, sym=<optimized out>, pure=<optimized out>, 
start=<optimized out>, end=<optimized out>) at grob-property.cc:212
#18 0x0000555555619885 in Grob::get_stencil() const (this=0x55555611cd00) at 
grob.cc:130
#19 0x0000555555619885 in grob_stencil_extent (a=X_AXIS, me=0x55555611cd00) at 
grob.cc:850
#20 0x0000555555619885 in Grob::stencil_width(scm_unused_struct*) 
(smob=<optimized out>) at grob.cc:907
#21 0x00007ffff7b1fb62 in scm_dapply (proc=0x7ffff3b2dfd0, arg1=0x7ffff01c1210, 
args=0x404) at eval.c:4895
#22 0x000055555567e25d in Grob::try_callback_on_alist(scm_unused_struct**, 
scm_unused_struct*, scm_unused_struct*) (proc=0x7ffff3b2dfd0, 
sym=0x7ffff328c140, alist=0x55555611cd60, this=0x55555611cd00) at 
grob-property.cc:232
#23 0x000055555567e25d in Grob::internal_get_property(scm_unused_struct*) const 
(sym=<optimized out>, this=<optimized out>) at grob-property.cc:184
#24 0x000055555567e25d in Grob::internal_get_pure_property(scm_unused_struct*, 
int, int) const (end=<optimized out>, start=<optimized out>, sym=<optimized 
out>, this=<optimized out>)
    at grob-property.cc:201
#25 0x000055555567e25d in 
Grob::internal_get_maybe_pure_property(scm_unused_struct*, bool, int, int) 
const (this=<optimized out>, sym=<optimized out>, pure=<optimized out>, 
start=<optimized out>, end=<optimized out>) at grob-property.cc:212
#26 0x000055555561fba4 in Grob::extent(Grob*, Axis) const (address@hidden, 
address@hidden, address@hidden) at grob.cc:471
#27 0x00005555556c21bb in 
Axis_group_interface::relative_maybe_bound_group_extent(std::vector<Grob*, 
std::allocator<Grob*> > const&, Grob*, Axis, bool) (elts=std::vector of length 
180, capacity 256 = {...}, address@hidden, address@hidden, address@hidden) at 
axis-group-interface.cc:106
#28 0x00005555556c2525 in 
Axis_group_interface::relative_group_extent(std::vector<Grob*, 
std::allocator<Grob*> > const&, Grob*, Axis) (a=X_AXIS, common=0x5555561c3d50, 
elts=std::vector of length 180, capacity 256 = {...}) at 
axis-group-interface.cc:91
#29 0x00005555556c2525 in Axis_group_interface::generic_group_extent(Grob*, 
Axis) (a=X_AXIS, me=0x5555563774e0) at axis-group-interface.cc:453
#30 0x00005555556c2525 in Axis_group_interface::width(scm_unused_struct*) 
(smob=<optimized out>) at axis-group-interface.cc:362
#31 0x00007ffff7b1fb62 in scm_dapply (proc=0x7ffff3b8c720, arg1=0x7fffef558a10, 
args=0x404) at eval.c:4895
#32 0x000055555567e25d in Grob::try_callback_on_alist(scm_unused_struct**, 
scm_unused_struct*, scm_unused_struct*) (proc=0x7ffff3b8c720, 
sym=0x7ffff328c140, alist=0x555556377540, this=0x5555563774e0) at 
grob-property.cc:232
#33 0x000055555567e25d in Grob::internal_get_property(scm_unused_struct*) const 
(sym=<optimized out>, this=<optimized out>) at grob-property.cc:184
---Type <return> to continue, or q <return> to quit---
#34 0x000055555567e25d in Grob::internal_get_pure_property(scm_unused_struct*, 
int, int) const (end=<optimized out>, start=<optimized out>, sym=<optimized 
out>, this=<optimized out>)
    at grob-property.cc:201
#35 0x000055555567e25d in 
Grob::internal_get_maybe_pure_property(scm_unused_struct*, bool, int, int) 
const (this=<optimized out>, sym=<optimized out>, pure=<optimized out>, 
start=<optimized out>, end=<optimized out>) at grob-property.cc:212
#36 0x000055555561fba4 in Grob::extent(Grob*, Axis) const (address@hidden, 
address@hidden, address@hidden) at grob.cc:471
#37 0x0000555555874451 in Staff_grouper_interface::get_extremal_staff(Grob*, 
Grob*, Direction, Interval_t<double> const&) (address@hidden, address@hidden, 
address@hidden, iv=...) at staff-grouper-interface.cc:47
#38 0x000055555581bd42 in 
Side_position_interface::move_to_extremal_staff(scm_unused_struct*) 
(smob=<optimized out>) at side-position-interface.cc:470
#39 0x00007ffff7b1fb62 in scm_dapply (proc=0x7ffff3c8a0c0, arg1=0x7ffff0160ef0, 
args=0x404) at eval.c:4895
#40 0x000055555567e25d in Grob::try_callback_on_alist(scm_unused_struct**, 
scm_unused_struct*, scm_unused_struct*) (proc=0x7ffff3c8a0c0, 
sym=0x7ffff328a900, alist=0x55555614caa0, this=0x55555614ca40) at 
grob-property.cc:232
#41 0x000055555567e25d in Grob::internal_get_property(scm_unused_struct*) const 
(sym=<optimized out>, this=<optimized out>) at grob-property.cc:184
#42 0x000055555567e25d in Grob::internal_get_pure_property(scm_unused_struct*, 
int, int) const (end=<optimized out>, start=<optimized out>, sym=<optimized 
out>, this=<optimized out>)
    at grob-property.cc:201
#43 0x000055555567e25d in 
Grob::internal_get_maybe_pure_property(scm_unused_struct*, bool, int, int) 
const (this=<optimized out>, sym=<optimized out>, pure=<optimized out>, 
start=<optimized out>, end=<optimized out>) at grob-property.cc:212
#44 0x00005555555f733c in System::do_break_substitution_and_fixup_refpoints() 
(this=0x555556073c60) at system.cc:187
#45 0x0000555555687475 in Page_breaking::systems() (address@hidden) at 
page-breaking.cc:457
#46 0x0000555555752079 in Optimal_page_breaking::solve() (address@hidden) at 
optimal-page-breaking.cc:218
#47 0x000055555564d133 in ly_optimal_breaking(scm_unused_struct*) 
(pb=<optimized out>) at page-breaking-scheme.cc:45
#48 0x00007ffff7b1fb62 in scm_dapply (proc=0x7ffff3b43790, arg1=0x7ffff0614770, 
args=0x404) at eval.c:4895
#49 0x0000555555872e70 in Paper_book::pages() (address@hidden) at 
paper-book.cc:653
#50 0x000055555587316e in Paper_book::output_aux(scm_unused_struct*, bool, 
long*, long*) (address@hidden, address@hidden, address@hidden, address@hidden, 
address@hidden) at paper-book.cc:148
#51 0x000055555587340e in Paper_book::output(scm_unused_struct*) 
(address@hidden, address@hidden) at paper-book.cc:171
#52 0x000055555575ab7b in ly_book_process(scm_unused_struct*, 
scm_unused_struct*, scm_unused_struct*, scm_unused_struct*) 
(book_smob=<optimized out>, default_paper=<optimized out>, 
default_layout=0x7ffff0ae0970, output=0x7ffff2f13620) at book-scheme.cc:78
#53 0x00007ffff7b1fd0f in scm_dapply (proc=0x7ffff32cc4f0, arg1=0x7ffff3bf0980, 
args=0x7ffff0614790, address@hidden) at eval.c:4930
#54 0x00007ffff7b20cb8 in deval (x=<optimized out>, env=<optimized out>) at 
eval.c:4378
#55 0x00007ffff7b2a252 in scm_c_with_fluid (fluid=0x7ffff3287e20, 
address@hidden, address@hidden <catch_protected_eval_body(void*)>, 
address@hidden) at fluids.c:463
#56 0x000055555589d156 in ly_eval_scm(scm_unused_struct*, Input, bool, 
Lily_parser*) (address@hidden, i=..., address@hidden, address@hidden)
    at parse-scm.cc:181
#57 0x0000555555900ae4 in Lily_lexer::eval_scm(scm_unused_struct*, Input, char) 
(address@hidden, address@hidden, hi=..., address@hidden '#') at lexer.ll:1110
#58 0x0000555555917a4c in Lily_lexer::eval_scm_token(scm_unused_struct*, Input) 
(address@hidden, sval=0x7ffff0617d50, w=...) at ./include/lily-lexer.hh:63
#59 0x000055555590d914 in yyparse(Lily_parser*, scm_unused_struct**) 
(address@hidden, address@hidden) at parser.yy:452
#60 0x00005555559179d4 in Lily_parser::do_yyparse_trampoline(void*) 
(address@hidden) at parser.yy:4243
#61 0x00007ffff7b2a252 in scm_c_with_fluid (fluid=0x7ffff3287ea0, 
value=0x7ffff163c710, address@hidden 
<Lily_parser::do_yyparse_trampoline(void*)>, address@hidden) at fluids.c:463
#62 0x000055555590704e in Lily_parser::do_yyparse() (address@hidden) at 
parser.yy:4236
#63 0x0000555555806568 in 
Lily_parser::parse_file(std::__cxx11::basic_string<char, 
std::char_traits<char>, std::allocator<char> > const&, 
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > 
const&, std::__cxx11::basic_string<char, std::char_traits<char>, 
std::allocator<char> > const&) (address@hidden, init="init.ly", 
name="/tmp/harm.ly", out_name="harm") at lily-parser.cc:123
#64 0x000055555584e080 in ly_parse_file(scm_unused_struct*) (name=<optimized 
out>) at lily-parser-scheme.cc:121
#65 0x00007ffff7b21def in deval (x=<optimized out>, address@hidden, 
env=<optimized out>, address@hidden) at eval.c:4232
#66 0x00007ffff7b202dd in scm_dapply (proc=0x7ffff163c8b0, arg1=<optimized 
out>, args=0x7ffff163c7a0) at eval.c:5012
---Type <return> to continue, or q <return> to quit---
#67 0x00007ffff7b78de8 in scm_c_catch (tag=<optimized out>, address@hidden 
<scm_body_thunk>, address@hidden, handler=0x7ffff7b78700 <scm_handle_by_proc>, 
address@hidden, pre_unwind_handler=0x0, pre_unwind_handler_data=0x7fffffffd030) 
at throw.c:203
#68 0x00007ffff7b78f0d in scm_catch_with_pre_unwind_handler (key=<optimized 
out>, thunk=<optimized out>, handler=<optimized out>, 
pre_unwind_handler=<optimized out>) at throw.c:587
#69 0x00007ffff7b1fd0f in scm_dapply (proc=0x7ffff32cc4f0, arg1=0x7ffff3cbf8e0, 
args=0x7ffff163c7f0, address@hidden) at eval.c:4930
#70 0x00007ffff7b20cb8 in deval (x=<optimized out>, env=<optimized out>, 
address@hidden) at eval.c:4378
#71 0x00007ffff7b20f2f in deval (x=0x7ffff17dc930, address@hidden, 
env=0x7ffff163ca50, address@hidden) at eval.c:3397
#72 0x00007ffff7b202dd in scm_dapply (proc=0x7ffff1642c00, arg1=<optimized 
out>, args=0x7ffff16421e0) at eval.c:5012
#73 0x00007ffff1de65e0 in scm_srfi1_for_each (proc=0x7ffff1642a80, 
arg1=0x7ffff163df90, args=<optimized out>) at srfi-1.c:1516
#74 0x00007ffff7b21055 in deval (x=<optimized out>, env=<optimized out>, 
address@hidden) at eval.c:4509
#75 0x00007ffff7b20f2f in deval (x=0x7ffff17dbe20, env=0x7ffff163d8e0, 
address@hidden) at eval.c:3397
#76 0x00007ffff7b21c13 in deval (x=0x7ffff163db10, address@hidden, 
address@hidden) at eval.c:3648
#77 0x00007ffff7b202dd in scm_dapply (proc=0x7ffff17e1ac0, arg1=<optimized 
out>, args=0x7ffff163df50) at eval.c:5012
#78 0x00005555557716c0 in Scm_variable::operator()(scm_unused_struct*) 
(arg1=<optimized out>, this=<optimized out>) at ./include/lily-modules.hh:73
#79 0x00005555557716c0 in main_with_guile(void*, int, char**) () at main.cc:539
#80 0x00007ffff7b3ae0f in invoke_main_func (body_data=0x7fffffffdc30) at 
init.c:367
#81 0x00007ffff7b1246a in c_body (address@hidden) at continuations.c:349
#82 0x00007ffff7b78de8 in scm_c_catch (address@hidden, address@hidden <c_body>, 
address@hidden, address@hidden <c_handler>, address@hidden, address@hidden 
<scm_handle_by_message_noexit>, pre_unwind_handler_data=0x0) at throw.c:203
#83 0x00007ffff7b12a44 in scm_i_with_continuation_barrier (address@hidden 
<c_body>, address@hidden, address@hidden <c_handler>, address@hidden, 
pre_unwind_handler=0x7ffff7b793d0 <scm_handle_by_message_noexit>, 
address@hidden) at continuations.c:325
#84 0x00007ffff7b12b20 in scm_c_with_continuation_barrier (address@hidden 
<invoke_main_func>, address@hidden) at continuations.c:367
#85 0x00007ffff7b77176 in scm_i_with_guile_and_parent (func=0x7ffff7b3adf0 
<invoke_main_func>, data=0x7fffffffdc30, parent=<optimized out>) at 
threads.c:733
#86 0x00007ffff7b3af85 in scm_boot_guile (argc=<optimized out>, argv=<optimized 
out>, main_func=<optimized out>, closure=<optimized out>) at init.c:350
#87 0x0000555555599def in main(int, char**, char**) (argc=2, 
argv=0x7fffffffddf8, envp=<optimized out>) at main.cc:853
(gdb) 

I have to see what to make of that.

-- 
David Kastrup