Re: `scm_c_read ()' and `swap_buffer' trick harmful

[Miroslav Lichvar]

On Fri, Dec 19, 2008 at 09:25:27PM +0100, Ludovic Courtès wrote:
> > It seems that the optimizations broke lilypond, it's now failing with
> > this message:
> >
> > ports.c:978: scm_fill_input: Assertion `pt->read_pos == pt->read_end' 
> > failed.
> 
> Ouch!
> 
> > A bug report is here:
> > https://bugzilla.redhat.com/show_bug.cgi?id=477007
> 
> Can you get a full C backtrace?

Here it is, let me know if you need anything else.

(gdb) bt
#0  0x00007f6b232b6f05 in raise () from /lib64/libc.so.6
#1  0x00007f6b232b8a73 in abort () from /lib64/libc.so.6
#2  0x00007f6b232afef9 in __assert_fail () from /lib64/libc.so.6
#3  0x0000000000d52b92 in scm_fill_input (port=0x7f6b1d4b7420) at ports.c:978
#4  0x0000000000638b66 in internal_ly_parse_scm (ps=0x7fff2b827bc0) at 
parse-scm.cc:43
#5  0x0000000000638d38 in ly_parse_scm (
    s=0x1fe907c "(if (and #t (defined? 'set-debug-cell-accesses!))\n  
(set-debug-cell-accesses! 5000))\n\n\\version \"2.10.0\"\n\n\\include 
\"declarations-init.ly\"\n\n\n#(ly:set-option 'old-relative #f)\n#(define 
toplevel-scores (l"..., n=0x7fff2b827dcc, i=
      {start_ = 0x1fe907c "(if (and #t (defined? 'set-debug-cell-accesses!))\n  
(set-debug-cell-accesses! 5000))\n\n\\version \"2.10.0\"\n\n\\include 
\"declarations-init.ly\"\n\n\n#(ly:set-option 'old-relative #f)\n#(define 
toplevel-scores (l"..., end_ = 0x1fe907c "(if (and #t (defined? 
'set-debug-cell-accesses!))\n  (set-debug-cell-accesses! 5000))\n\n\\version 
\"2.10.0\"\n\n\\include \"declarations-init.ly\"\n\n\n#(ly:set-option 
'old-relative #f)\n#(define toplevel-scores (l"..., source_file_ = 0x208cdd0}, 
safe=false, parser=0x2083ee0)
    at parse-scm.cc:131
#6  0x0000000000751c0b in Lily_lexer::yylex (this=0x1fc2d40) at lexer.ll:340
#7  0x000000000075506e in yylex (s=0x7fff2b82a4a0, loc=0x7fff2b82a480, 
v=0x2083ee0) at parser.yy:2696
#8  0x000000000075680f in yyparse (my_lily_parser=0x2083ee0) at 
out/parser.cc:2612
#9  0x0000000000762d31 in Lily_parser::do_yyparse (this=0x2083ee0) at 
parser.yy:2476
#10 0x00000000005a3278 in Lily_parser::parse_file (this=0x2083ee0, init=
        {static npos = 18446744073709551615, _M_dataplus = 
{<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data 
fields>}, <No data fields>}, _M_p = 0x2000f38 "init.ly"}}, name=
        {static npos = 18446744073709551615, _M_dataplus = 
{<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data 
fields>}, <No data fields>}, _M_p = 0x2083a18 
"/tmp/lilypond-2.11.65/ly/generate-documentation.ly"}}, out_name=
        {static npos = 18446744073709551615, _M_dataplus = 
{<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data 
fields>}, <No data fields>}, _M_p = 0x2040a18 "generate-documentation"}})
    at lily-parser.cc:114
#11 0x00000000005a1118 in ly_parse_file (name=0x7f6b21d1b260) at 
lily-parser-scheme.cc:124
#12 0x0000000000d1d2b4 in deval (x=0x404, env=0x7f6b1d4b57b0) at eval.c:4232
#13 0x0000000000d1f512 in scm_dapply (proc=0x7f6b1d4b58c0, arg1=0x404, 
args=0x7f6b1d4b57b0) at eval.c:5012
#14 0x0000000000d13e73 in scm_apply (proc=0x7f6b1d4b58a0, arg1=0x404, 
args=0x404) at eval.c:4811
#15 0x0000000000d13bb8 in scm_call_0 (proc=0x7f6b1d4b58a0) at eval.c:4666
#16 0x0000000000d826b1 in scm_body_thunk (body_data=0x7fff2b82d100) at 
throw.c:355
#17 0x0000000000d821c9 in scm_c_catch (tag=0x7f6b21d66860, body=0xd82690 
<scm_body_thunk>, 
    body_data=0x7fff2b82d100, handler=0xd826b3 <scm_handle_by_proc>, 
handler_data=0x7fff2b82d0e8, 
    pre_unwind_handler=0, pre_unwind_handler_data=0x7fff2b82d0e0) at throw.c:203
#18 0x0000000000d82b72 in scm_catch_with_pre_unwind_handler 
(key=0x7f6b21d66860, thunk=0x7f6b1d4b58a0, 
    handler=0x7f6b1d4b5830, pre_unwind_handler=0x204) at throw.c:587
#19 0x0000000000d3438c in scm_gsubr_apply (args=0x404) at gsubr.c:223
#20 0x0000000000d1efcc in scm_dapply (proc=0x7f6b21fb84f0, arg1=0x7f6b229ab8e0, 
args=0x7f6b1d4b5800)
    at eval.c:4930
#21 0x0000000000d1dda2 in deval (x=0x7f6b20320f90, env=0x7f6b1d4b5950) at 
eval.c:4378
#22 0x0000000000d17c02 in deval (x=0x7f6b20324010, env=0x7f6b1d4b5a60) at 
eval.c:3397
#23 0x0000000000d1f512 in scm_dapply (proc=0x7f6b1d4b3db0, arg1=0x404, 
args=0x7f6b1d4b3d20) at eval.c:5012
#24 0x0000000000d13e73 in scm_apply (proc=0x7f6b1d4b3d90, arg1=0x7f6b21d1b260, 
args=0x7f6b229aa700)
    at eval.c:4811
#25 0x0000000000d13be2 in scm_call_1 (proc=0x7f6b1d4b3d90, arg1=0x7f6b21d1b260) 
at eval.c:4672
#26 0x00007f6b20ad295b in scm_srfi1_for_each (proc=0x7f6b1d4b3d90, 
arg1=0x7f6b20283060, args=0x404)
    at srfi-1.c:1516
#27 0x0000000000d1dca3 in deval (x=0x404, env=0x7f6b20282930) at eval.c:4367
#28 0x0000000000d17c02 in deval (x=0x7f6b20323790, env=0x7f6b20282930) at 
eval.c:3397
#29 0x0000000000d19c96 in deval (x=0x7f6b20282b60, env=0x7f6b20282fa0) at 
eval.c:3648
#30 0x0000000000d1f512 in scm_dapply (proc=0x7f6b203290f0, arg1=0x404, 
args=0x7f6b20282fa0) at eval.c:5012
#31 0x0000000000d13e73 in scm_apply (proc=0x7f6b20328f40, arg1=0x7f6b20283060, 
args=0x7f6b229aa700)
    at eval.c:4811
#32 0x0000000000d13be2 in scm_call_1 (proc=0x7f6b20328f40, arg1=0x7f6b20283060) 
at eval.c:4672
#33 0x00000000005bb2a1 in main_with_guile () at main.cc:426
#34 0x0000000000d38aee in invoke_main_func (body_data=0x7fff2b830890) at 
init.c:367
#35 0x0000000000cfc9ea in c_body (d=0x7fff2b8307d0) at continuations.c:349
#36 0x0000000000d821c9 in scm_c_catch (tag=0x104, body=0xcfc9c5 <c_body>, 
body_data=0x7fff2b8307d0, 
    handler=0xcfc9fc <c_handler>, handler_data=0x7fff2b8307d0, 
    pre_unwind_handler=0xd82a02 <scm_handle_by_message_noexit>, 
pre_unwind_handler_data=0x0) at throw.c:203
#37 0x0000000000cfc98e in scm_i_with_continuation_barrier (body=0xcfc9c5 
<c_body>, 
    body_data=0x7fff2b8307d0, handler=0xcfc9fc <c_handler>, 
handler_data=0x7fff2b8307d0, 
    pre_unwind_handler=0xd82a02 <scm_handle_by_message_noexit>, 
pre_unwind_handler_data=0x0)
    at continuations.c:325
#38 0x0000000000cfca72 in scm_c_with_continuation_barrier (func=0xd38aa1 
<invoke_main_func>, 
    data=0x7fff2b830890) at continuations.c:367
#39 0x0000000000d8035d in scm_i_with_guile_and_parent (func=0xd38aa1 
<invoke_main_func>, 
    data=0x7fff2b830890, parent=0x0) at threads.c:726
#40 0x0000000000d8032a in scm_with_guile (func=0xd38aa1 <invoke_main_func>, 
data=0x7fff2b830890)
    at threads.c:714
#41 0x0000000000d38a82 in scm_boot_guile (argc=3, argv=0x7fff2b830a08, 
    main_func=0x5bad7a <main_with_guile>, closure=0x0) at init.c:350
#42 0x00000000005bad6c in main (argc=3, argv=0x7fff2b830a08, 
envp=0x7fff2b830a28) at main.cc:622


-- 
Miroslav Lichvar