bug#51689: emacs

[Han Boetes <han@boetes.org>]

Eli Zaretskii wrote:
> I think at this point only running under a debugger will help us
> efficiently.  So please act according to the instructions below, and
> show the backtrace it produces:
> 
>   $ cd /path/to/emacs/src/
>   $ gdb ./emacs
>   GNU gdb (GDB) 11.1
>   Copyright (C) 2021 Free Software Foundation, Inc.
>   ...
>   (gdb) source ./.gdbinit
>   (gdb) break Fsignal
>   (gdb) commands
>   Type commands for breakpoint(s) 2, one per line.
>   End with a line saying just "end".
>   > pp error_symbol
>   > pp data
>   > end
>   (gdb) run -Q -nw
> 
> When the breakpoint breaks, look at the error_symbol and data printed
> by GDB; if the symbol are not "void-function", type "continue" at
> GDB's prompt to run Emacs further.  When you eventually get symbol as
> "void-function" and data that mentions regexp-opt-group, type:
> 
>   (gdb) thread apply all bt
> 
> This should produce both C-level backtrace and Lisp-level backtrace of
> all the threads in Emacs.  Please post that here in its entirety.

Ah! Symbols! How could I forget! There we go!

Thread 1 (thread 539720):
#0  Fsignal (error_symbol=XIL(0xe100), data=XIL(0x9c8f1ef8c23)) at eval.c:1790
#1  0x000009c69f24c271 in xsignal (error_symbol=XIL(0xe100), data=XIL(0x9c8f1ef8c23)) at lisp.h:4155
#2  0x000009c69f252211 in xsignal1 (error_symbol=XIL(0xe100), arg=XIL(0x2b1578948)) at eval.c:1949
#3  0x000009c69f22d539 in Fdefault_value (symbol=XIL(0x2b1578948)) at data.c:1824
#4  0x000009c69f24e5a1 in Fdefault_toplevel_value (symbol=XIL(0x2b1578948)) at eval.c:755
#5  0x000009c69f25633a in funcall_subr (subr=0x9c69f72ca00 <Sdefault_toplevel_value>, numargs=1, args=0x7f7ffffe9568) at eval.c:3143
#6  0x000009c69f255d66 in Ffuncall (nargs=2, args=0x7f7ffffe9560) at eval.c:3068
#7  0x000009c8cd6fcc36 in F637573746f6d2d696e697469616c697a652d7265736574_custom_initialize_reset_0 () from /usr/obj/work/emacs/src/emacs/src/../native-lisp/29.0.50-8f1f8882/preloaded/custom-e63dc4f2-1b2226d6.eln
#8  0x000009c69f25635e in funcall_subr (subr=0x9c95095fc00, numargs=2, args=0x7f7ffffe9738) at eval.c:3145
#9  0x000009c69f255d66 in Ffuncall (nargs=3, args=0x7f7ffffe9730) at eval.c:3068
#10 0x000009c8cd6fd492 in F637573746f6d2d6465636c6172652d7661726961626c65_custom_declare_variable_0 () from /usr/obj/work/emacs/src/emacs/src/../native-lisp/29.0.50-8f1f8882/preloaded/custom-e63dc4f2-1b2226d6.eln
#11 0x000009c69f256207 in funcall_subr (subr=0x9c95092cf30, numargs=7, args=0x7f7ffffe9940) at eval.c:3123
#12 0x000009c69f255d66 in Ffuncall (nargs=8, args=0x7f7ffffe9938) at eval.c:3068
#13 0x000009c69f2b6fb4 in exec_byte_code (bytestr=XIL(0x9c93e356a44), vector=XIL(0x9c93135b2a5), maxdepth=make_fixnum(8), args_template=XIL(0), nargs=0, args=0x0) at bytecode.c:632
#14 0x000009c69f2b60a5 in Fbyte_code (bytestr=XIL(0x9c93e356a44), vector=XIL(0x9c93135b2a5), maxdepth=make_fixnum(8)) at bytecode.c:334
#15 0x000009c69f25436e in eval_sub (form=XIL(0x9c8e1175223)) at eval.c:2549
#16 0x000009c69f2536cc in Feval (form=XIL(0x9c8e1175223), lexical=XIL(0x30)) at eval.c:2372
#17 0x000009c91457a821 in top_level_run () from /usr/obj/work/emacs/src/emacs/native-lisp/29.0.50-8f1f8882/bytecomp-4f134b45-abb2ff90.eln
#18 0x000009c69f2c8c2c in load_comp_unit (comp_u=0x9c931340908, loading_dump=false, late_load=false) at comp.c:5093
#19 0x000009c69f2c9bad in Fnative_elisp_load (filename=XIL(0x9c93133c8c4), late_load=XIL(0)) at comp.c:5309
#20 0x000009c69f297527 in Fload (file=XIL(0x9c950d0fdac), noerror=XIL(0), nomessage=XIL(0x30), nosuffix=XIL(0), must_suffix=XIL(0x30)) at lread.c:1564
#21 0x000009c69f2978b3 in save_match_data_load (file=XIL(0x9c950d0fdac), noerror=XIL(0), nomessage=XIL(0x30), nosuffix=XIL(0), must_suffix=XIL(0x30)) at lread.c:1628
#22 0x000009c69f269c2f in Frequire (feature=XIL(0x2b1558dd8), filename=XIL(0), noerror=XIL(0)) at fns.c:3188
#23 0x000009c69f25638d in funcall_subr (subr=0x9c69f72f940 <Srequire>, numargs=1, args=0x7f7ffffea3f0) at eval.c:3148
#24 0x000009c69f255d66 in Ffuncall (nargs=2, args=0x7f7ffffea3e8) at eval.c:3068
#25 0x000009c69f2b6fb4 in exec_byte_code (bytestr=XIL(0x9c8e35bf664), vector=XIL(0x9c8ac9a3755), maxdepth=make_fixnum(10), args_template=XIL(0), nargs=0, args=0x0) at bytecode.c:632
#26 0x000009c69f2b60a5 in Fbyte_code (bytestr=XIL(0x9c8e35bf664), vector=XIL(0x9c8ac9a3755), maxdepth=make_fixnum(10)) at bytecode.c:334
#27 0x000009c69f25436e in eval_sub (form=XIL(0x9c90d9e8293)) at eval.c:2549
#28 0x000009c69f2536cc in Feval (form=XIL(0x9c90d9e8293), lexical=XIL(0x30)) at eval.c:2372
#29 0x000009c8daf2a7f2 in top_level_run () from /usr/obj/work/emacs/src/emacs/native-lisp/29.0.50-8f1f8882/comp-af992f0e-a040a5e7.eln
#30 0x000009c69f2c8c2c in load_comp_unit (comp_u=0x9c8ac9bd328, loading_dump=false, late_load=false) at comp.c:5093
#31 0x000009c69f2c9bad in Fnative_elisp_load (filename=XIL(0x9c93e37cca4), late_load=XIL(0)) at comp.c:5309
#32 0x000009c69f297527 in Fload (file=XIL(0x9c9509a82e4), noerror=XIL(0), nomessage=XIL(0x30), nosuffix=XIL(0), must_suffix=XIL(0x30)) at lread.c:1564
#33 0x000009c69f2978b3 in save_match_data_load (file=XIL(0x9c9509a82e4), noerror=XIL(0), nomessage=XIL(0x30), nosuffix=XIL(0), must_suffix=XIL(0x30)) at lread.c:1628
#34 0x000009c69f269c2f in Frequire (feature=XIL(0x3cc0), filename=XIL(0), noerror=XIL(0)) at fns.c:3188
#35 0x000009c69f2c80d3 in maybe_defer_native_compilation (function_name=XIL(0x29ebd14f0), definition=XIL(0x9c8ac9b58ed)) at comp.c:4870
#36 0x000009c69f22a71e in Fdefalias (symbol=XIL(0x29ebd14f0), definition=XIL(0x9c8ac9b58ed), docstring=XIL(0)) at data.c:830
#37 0x000009c69f25436e in eval_sub (form=XIL(0x9c8d0c35ce3)) at eval.c:2549
#38 0x000009c69f29a0c2 in readevalloop (readcharfun=XIL(0x6990), infile0=0x7f7ffffeb2f0, sourcename=XIL(0x9c93e36f6a4), printflag=false, unibyte=XIL(0), readfun=XIL(0), start=XIL(0), end=XIL(0)) at lread.c:2325
#39 0x000009c69f2975ec in Fload (file=XIL(0x9c93e36f444), noerror=XIL(0), nomessage=XIL(0x30), nosuffix=XIL(0), must_suffix=XIL(0)) at lread.c:1578
#40 0x000009c69f2978b3 in save_match_data_load (file=XIL(0x9c93e36f444), noerror=XIL(0), nomessage=XIL(0x30), nosuffix=XIL(0), must_suffix=XIL(0x30)) at lread.c:1628
#41 0x000009c69f269c2f in Frequire (feature=XIL(0x2d0b6d670), filename=XIL(0), noerror=XIL(0)) at fns.c:3188
#42 0x000009c69f25638d in funcall_subr (subr=0x9c69f72f940 <Srequire>, numargs=1, args=0x7f7ffffeb540) at eval.c:3148
#43 0x000009c69f255d66 in Ffuncall (nargs=2, args=0x7f7ffffeb538) at eval.c:3068
#44 0x000009c69f2b6fb4 in exec_byte_code (bytestr=XIL(0x9c93e36f404), vector=XIL(0x9c8ac9c3ab5), maxdepth=make_fixnum(10), args_template=XIL(0), nargs=0, args=0x0) at bytecode.c:632
#45 0x000009c69f2b60a5 in Fbyte_code (bytestr=XIL(0x9c93e36f404), vector=XIL(0x9c8ac9c3ab5), maxdepth=make_fixnum(10)) at bytecode.c:334
#46 0x000009c69f25436e in eval_sub (form=XIL(0x9c8d0c36fc3)) at eval.c:2549
#47 0x000009c69f29a0c2 in readevalloop (readcharfun=XIL(0x6990), infile0=0x7f7ffffebc70, sourcename=XIL(0x9c93e384fa4), printflag=false, unibyte=XIL(0), readfun=XIL(0), start=XIL(0), end=XIL(0)) at lread.c:2325
#48 0x000009c69f2975ec in Fload (file=XIL(0x9c93e384dc4), noerror=XIL(0x30), nomessage=XIL(0x30), nosuffix=XIL(0), must_suffix=XIL(0)) at lread.c:1578
#49 0x000009c94e6e8842 in F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_50 () from /usr/obj/work/emacs/src/emacs/src/../native-lisp/29.0.50-8f1f8882/preloaded/faces-e245131e-8647c9a2.eln
#50 0x000009c69f25633a in funcall_subr (subr=0x9c950dde6b0, numargs=1, args=0x7f7ffffebe58) at eval.c:3143
#51 0x000009c69f255d66 in Ffuncall (nargs=2, args=0x7f7ffffebe50) at eval.c:3068
#52 0x000009c94e6e8646 in F7474792d66696e642d74797065_tty_find_type_0 () from /usr/obj/work/emacs/src/emacs/src/../native-lisp/29.0.50-8f1f8882/preloaded/faces-e245131e-8647c9a2.eln
#53 0x000009c69f25635e in funcall_subr (subr=0x9c9509c3ca0, numargs=2, args=0x7f7ffffec038) at eval.c:3145
#54 0x000009c69f255d66 in Ffuncall (nargs=3, args=0x7f7ffffec030) at eval.c:3068
#55 0x000009c94e6e8a70 in F7474792d72756e2d7465726d696e616c2d696e697469616c697a6174696f6e_tty_run_terminal_initialization_0 () from /usr/obj/work/emacs/src/emacs/src/../native-lisp/29.0.50-8f1f8882/preloaded/faces-e245131e-8647c9a2.eln
#56 0x000009c69f25638d in funcall_subr (subr=0x9c950c44d50, numargs=3, args=0x7f7ffffec1e8) at eval.c:3148
#57 0x000009c69f255d66 in Ffuncall (nargs=4, args=0x7f7ffffec1e0) at eval.c:3068
#58 0x000009c986a3ad0d in F636f6d6d616e642d6c696e65_command_line_0 () from /usr/obj/work/emacs/src/emacs/src/../native-lisp/29.0.50-8f1f8882/preloaded/startup-a18662e4-026a11a7.eln
#59 0x000009c69f256321 in funcall_subr (subr=0x9c950c21030, numargs=0, args=0x7f7ffffec3c0) at eval.c:3141
#60 0x000009c69f255d66 in Ffuncall (nargs=1, args=0x7f7ffffec3b8) at eval.c:3068
#61 0x000009c986a363a6 in F6e6f726d616c2d746f702d6c6576656c_normal_top_level_0 () from /usr/obj/work/emacs/src/emacs/src/../native-lisp/29.0.50-8f1f8882/preloaded/startup-a18662e4-026a11a7.eln
#62 0x000009c69f2542e3 in eval_sub (form=XIL(0x9c950d57a43)) at eval.c:2540
#63 0x000009c69f2536cc in Feval (form=XIL(0x9c950d57a43), lexical=XIL(0)) at eval.c:2372
#64 0x000009c69f166219 in top_level_2 () at keyboard.c:1143
#65 0x000009c69f2510cc in internal_condition_case (bfun=0x9c69f1661ef <top_level_2>, handlers=XIL(0x90), hfun=0x9c69f165948 <cmd_error>) at eval.c:1495
#66 0x000009c69f166271 in top_level_1 (ignore=XIL(0)) at keyboard.c:1151
#67 0x000009c69f2501a9 in internal_catch (tag=XIL(0xd110), func=0x9c69f16621b <top_level_1>, arg=XIL(0)) at eval.c:1226
#68 0x000009c69f16612b in command_loop () at keyboard.c:1111
#69 0x000009c69f1653c9 in recursive_edit_1 () at keyboard.c:721
#70 0x000009c69f165604 in Frecursive_edit () at keyboard.c:804
#71 0x000009c69f160ff3 in main (argc=3, argv=0x7f7ffffec838) at emacs.c:2345

Lisp Backtrace:
"default-toplevel-value" (0xfffe9568)
"custom-initialize-reset" (0xfffe9738)
"custom-declare-variable" (0xfffe9940)
"byte-code" (0xfffe9db0)
"require" (0xfffea3f0)
"byte-code" (0xfffea9b0)
"defalias" (0xfffeb030)
"require" (0xfffeb540)
"byte-code" (0xfffeb9b0)
0x50dde6b0 PVEC_SUBR
"tty-find-type" (0xfffec038)
"tty-run-terminal-initialization" (0xfffec1e8)
"command-line" (0xfffec3c0)
"normal-top-level" (0xfffec4d0)

Breakpoint 3, Fsignal (error_symbol=XIL(0xe100), data=XIL(0x9c9423a4e03)) at eval.c:1790
1790      if (NILP (error_symbol) && NILP (data))
void-variable
(byte-compile-verbose)