bug#26961: 26.0.50; Possible timming issue in regex-tests.el

[Tino Calancha <tino.calancha@gmail.com>]

Tino Calancha <tino.calancha@gmail.com> writes:

> ;;; II) This one fails in Debian-9, but it works in Fedora-25:
> emacs --batch -L ":." -l ert -l src/regex-tests.el \
> --eval '(let (arg) (ert-run-tests-batch-and-exit arg))'

> In GNU Emacs 26.0.50 (build 5, x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
> Repository revision: f7c07930b581b1bcfdfb1874b6883233516bdf11
> Windowing system distributor 'The X.Org Foundation', version 11.0.11902000
> System Description:	Debian GNU/Linux 9.0 (stretch)
I can reproduce the issue after compile Emacs without optimizations.
Following is the backtrace after Emacs crash:

(gdb) run -batch -L ":../test" -l ert -l ../test/src/regex-tests.el -eval '(let (arg) (ert-run-tests-batch-and-exit arg))'

Starting program: /home/calancha/soft/emacs-master/src/bootstrap-emacs -batch -L ":../test" -l ert -l ../test/src/regex-tests.el -eval '(let (arg) (ert-run-tests-batch-and-exit arg))'

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe5754700 (LWP 4349)]

Thread 1 "bootstrap-emacs" hit Breakpoint 1, terminate_due_to_signal (sig=6, backtrace_limit=40) at emacs.c:363
363	  signal (sig, SIG_DFL);
(gdb) bt
#0  terminate_due_to_signal (sig=6, backtrace_limit=40) at emacs.c:363
#1  0x00000000005c1191 in emacs_abort () at sysdep.c:2371
#2  0x0000000000629189 in mark_object (arg=XIL(0x7fffffffbc54)) at alloc.c:6428
#3  0x00000000006299ae in mark_object (arg=XIL(0x2f44ac3)) at alloc.c:6667
#4  0x0000000000625a6c in mark_maybe_object (obj=XIL(0x2f44ac3)) at alloc.c:4788
#5  0x0000000000625e47 in mark_memory (start=0x7fffffff6b70, end=0x7fffffffe08f) at alloc.c:4940
#6  0x0000000000625e7c in mark_stack (bottom=0x7fffffffe08f "", end=0x7fffffff6b70 "\200\214!\001") at alloc.c:5138
#7  0x00000000006e01dc in mark_one_thread (thread=0xe1b2a0 <main_thread>) at thread.c:603
#8  0x00000000006e0371 in mark_threads_callback (ignore=0x0) at thread.c:634
#9  0x0000000000625ec4 in flush_stack_call_func (func=0x6e02de <mark_threads_callback>, arg=0x0) at alloc.c:5165
#10 0x00000000006e03a3 in mark_threads () at thread.c:641
#11 0x0000000000627e8b in garbage_collect_1 (end=0x7fffffff6d50) at alloc.c:5942
#12 0x0000000000628562 in Fgarbage_collect () at alloc.c:6108
#13 0x00000000005905a5 in maybe_gc () at lisp.h:4711
#14 0x000000000065085f in Ffuncall (nargs=2, args=0x7fffffff6e50) at eval.c:2726
#15 0x00000000006502f9 in call1 (fn=XIL(0xaa380), arg1=XIL(0x2fd0)) at eval.c:2606
#16 0x00000000005c9143 in Fkill_buffer (buffer_or_name=XIL(0x2f5ff35)) at buffer.c:1889
#17 0x000000000064f250 in eval_sub (form=XIL(0x2f278a3)) at eval.c:2220
#18 0x0000000000649ad3 in Fand (args=XIL(0x2f278b3)) at eval.c:384
#19 0x000000000064ee7c in eval_sub (form=XIL(0x2f278d3)) at eval.c:2173
#20 0x0000000000649e8b in Fprogn (body=XIL(0x2f278e3)) at eval.c:449
#21 0x0000000000649efc in prog_ignore (body=XIL(0x2f278e3)) at eval.c:461
#22 0x0000000000652ab5 in do_one_unbind (this_binding=0x7fffffff7260, unwinding=true, bindflag=SET_INTERNAL_UNBIND) at eval.c:3367
#23 0x0000000000652f18 in unbind_to (count=82, value=XIL(0x2ef8474)) at eval.c:3486
#24 0x000000000064c40c in Funwind_protect (args=XIL(0x2f2fb73)) at eval.c:1186
#25 0x000000000064ee7c in eval_sub (form=XIL(0x2f2fb63)) at eval.c:2173
#26 0x0000000000649e8b in Fprogn (body=XIL(0x2f2f413)) at eval.c:449
#27 0x000000000063a45e in Fsave_current_buffer (args=XIL(0x2f2f403)) at editfns.c:1061
#28 0x000000000064ee7c in eval_sub (form=XIL(0x2f2fbd3)) at eval.c:2173
#29 0x0000000000649e8b in Fprogn (body=XIL(0x2f2f423)) at eval.c:449
#30 0x000000000064bc42 in Flet (args=XIL(0x2f2f433)) at eval.c:963
#31 0x000000000064ee7c in eval_sub (form=XIL(0x2f2f443)) at eval.c:2173
#32 0x0000000000649e8b in Fprogn (body=XIL(0x2f2f483)) at eval.c:449
#33 0x0000000000651989 in funcall_lambda (fun=XIL(0x2f2f4e3), nargs=2, arg_vector=0x0) at eval.c:3015
#34 0x00000000006511ad in apply_lambda (fun=XIL(0x2f2f4f3), args=XIL(0x2f2ec23), count=75) at eval.c:2881
#35 0x000000000064f63c in eval_sub (form=XIL(0x2f2ec13)) at eval.c:2295
#36 0x000000000064b4f4 in FletX (args=XIL(0x2f2d7b3)) at eval.c:874
#37 0x000000000064ee7c in eval_sub (form=XIL(0x2f2d7c3)) at eval.c:2173
#38 0x0000000000649e8b in Fprogn (body=XIL(0x2f2d033)) at eval.c:449
#39 0x0000000000649cab in Fif (args=XIL(0x2f2d003)) at eval.c:407
#40 0x000000000064ee7c in eval_sub (form=XIL(0x2f2d7d3)) at eval.c:2173
#41 0x0000000000649e8b in Fprogn (body=XIL(0x2f2d053)) at eval.c:449
#42 0x000000000064ee7c in eval_sub (form=XIL(0x2f2d043)) at eval.c:2173
#43 0x0000000000649bf5 in Fif (args=XIL(0x2f2d073)) at eval.c:406
#44 0x000000000064ee7c in eval_sub (form=XIL(0x2f2d063)) at eval.c:2173
#45 0x0000000000649e8b in Fprogn (body=XIL(0x2f2d0c3)) at eval.c:449
#46 0x000000000064bc42 in Flet (args=XIL(0x2f2d143)) at eval.c:963
#47 0x000000000064ee7c in eval_sub (form=XIL(0x2f2d153)) at eval.c:2173
#48 0x0000000000649e8b in Fprogn (body=XIL(0x2f2d183)) at eval.c:449
#49 0x0000000000649efc in prog_ignore (body=XIL(0x2f2d183)) at eval.c:461
#50 0x000000000064bd22 in Fwhile (args=XIL(0x2f2d173)) at eval.c:982
#51 0x000000000064ee7c in eval_sub (form=XIL(0x2f2d163)) at eval.c:2173
#52 0x0000000000649e8b in Fprogn (body=XIL(0x2f2d1a3)) at eval.c:449
#53 0x000000000064bc42 in Flet (args=XIL(0x2f2d1b3)) at eval.c:963
#54 0x000000000064ee7c in eval_sub (form=XIL(0x2f2d1c3)) at eval.c:2173
#55 0x0000000000649e8b in Fprogn (body=XIL(0x2f2d203)) at eval.c:449
#56 0x000000000064ee7c in eval_sub (form=XIL(0x2f2d1d3)) at eval.c:2173
#57 0x000000000064c3f5 in Funwind_protect (args=XIL(0x2f2d223)) at eval.c:1185
#58 0x000000000064ee7c in eval_sub (form=XIL(0x2f2d213)) at eval.c:2173
#59 0x0000000000649e8b in Fprogn (body=XIL(0x2f2d2a3)) at eval.c:449
#60 0x000000000063a45e in Fsave_current_buffer (args=XIL(0x2f2d293)) at editfns.c:1061
#61 0x000000000064ee7c in eval_sub (form=XIL(0x2f2d283)) at eval.c:2173
#62 0x0000000000649e8b in Fprogn (body=XIL(0x2f2d2b3)) at eval.c:449
#63 0x000000000064bc42 in Flet (args=XIL(0x2f2d2c3)) at eval.c:963
#64 0x000000000064ee7c in eval_sub (form=XIL(0x2f2d2d3)) at eval.c:2173
#65 0x0000000000649e8b in Fprogn (body=XIL(0x2f2d2e3)) at eval.c:449
#66 0x000000000064bc42 in Flet (args=XIL(0x2f2d303)) at eval.c:963
#67 0x000000000064ee7c in eval_sub (form=XIL(0x2f2d313)) at eval.c:2173
#68 0x0000000000649e8b in Fprogn (body=XIL(0x2f2d343)) at eval.c:449
#69 0x0000000000651989 in funcall_lambda (fun=XIL(0x2f2d3a3), nargs=0, arg_vector=0x0) at eval.c:3015
#70 0x0000000000650a8c in Ffuncall (nargs=1, args=0x7fffffff8f00) at eval.c:2758
#71 0x000000000064f783 in Fapply (nargs=2, args=0x7fffffff8f00) at eval.c:2328
#72 0x000000000064f08e in eval_sub (form=XIL(0x2f36223)) at eval.c:2191
#73 0x000000000064a0e7 in Fsetq (args=XIL(0x2f36243)) at eval.c:511
#74 0x000000000064ee7c in eval_sub (form=XIL(0x2f36253)) at eval.c:2173
#75 0x000000000064c3f5 in Funwind_protect (args=XIL(0x2f35543)) at eval.c:1185
#76 0x000000000064ee7c in eval_sub (form=XIL(0x2f35533)) at eval.c:2173
#77 0x000000000064f17e in eval_sub (form=XIL(0x2f35583)) at eval.c:2208
#78 0x0000000000649b93 in Fif (args=XIL(0x2f355b3)) at eval.c:403
#79 0x000000000064ee7c in eval_sub (form=XIL(0x2f355a3)) at eval.c:2173
#80 0x0000000000649e8b in Fprogn (body=XIL(0x2f355f3)) at eval.c:449
#81 0x000000000064bc42 in Flet (args=XIL(0x2f35603)) at eval.c:963
#82 0x000000000064ee7c in eval_sub (form=XIL(0x2f35613)) at eval.c:2173
#83 0x0000000000649e8b in Fprogn (body=XIL(0x2f35623)) at eval.c:449
#84 0x000000000064bc42 in Flet (args=XIL(0x2f35643)) at eval.c:963
#85 0x000000000064ee7c in eval_sub (form=XIL(0x2f35653)) at eval.c:2173
#86 0x0000000000649e8b in Fprogn (body=XIL(0x2f35663)) at eval.c:449
#87 0x000000000064bc42 in Flet (args=XIL(0x2f35673)) at eval.c:963
#88 0x000000000064ee7c in eval_sub (form=XIL(0x2f35683)) at eval.c:2173
#89 0x0000000000649e8b in Fprogn (body=XIL(0x2f356b3)) at eval.c:449
#90 0x0000000000651989 in funcall_lambda (fun=XIL(0x2f3c023), nargs=0, arg_vector=0x0) at eval.c:3015
#91 0x0000000000650a8c in Ffuncall (nargs=1, args=0x7fffffff9c90) at eval.c:2758
#92 0x00000000006a12f6 in exec_byte_code (bytestr=XIL(0x2e7b1d4), vector=XIL(0x1454ebd), maxdepth=XIL(0x26), args_template=XIL(0x406), nargs=1, args=0x7fffffffa238) at bytecode.c:641
#93 0x0000000000651573 in funcall_lambda (fun=XIL(0x1455c35), nargs=1, arg_vector=0x7fffffffa230) at eval.c:2944
#94 0x0000000000650986 in Ffuncall (nargs=2, args=0x7fffffffa228) at eval.c:2746
#95 0x00000000006a12f6 in exec_byte_code (bytestr=XIL(0x2e6e1e4), vector=XIL(0x1455d65), maxdepth=XIL(0x36), args_template=XIL(0x406), nargs=1, args=0x7fffffffa7b0) at bytecode.c:641
#96 0x0000000000651573 in funcall_lambda (fun=XIL(0x1455e8d), nargs=1, arg_vector=0x7fffffffa7a8) at eval.c:2944
#97 0x0000000000650986 in Ffuncall (nargs=2, args=0x7fffffffa7a0) at eval.c:2746
#98 0x00000000006a12f6 in exec_byte_code (bytestr=XIL(0x2e78384), vector=XIL(0x1488ee5), maxdepth=XIL(0x3a), args_template=XIL(0xc0e), nargs=3, args=0x7fffffffad48) at bytecode.c:641
#99 0x0000000000651573 in funcall_lambda (fun=XIL(0x1488fad), nargs=3, arg_vector=0x7fffffffad30) at eval.c:2944
#100 0x0000000000650986 in Ffuncall (nargs=4, args=0x7fffffffad28) at eval.c:2746
#101 0x00000000006a12f6 in exec_byte_code (bytestr=XIL(0x2ee9294), vector=XIL(0x1489c85), maxdepth=XIL(0x3a), args_template=XIL(0xc0a), nargs=3, args=0x7fffffffb2a0) at bytecode.c:641
#102 0x0000000000651573 in funcall_lambda (fun=XIL(0x1489d7d), nargs=3, arg_vector=0x7fffffffb288) at eval.c:2944
#103 0x0000000000650986 in Ffuncall (nargs=4, args=0x7fffffffb280) at eval.c:2746
#104 0x00000000006a12f6 in exec_byte_code (bytestr=XIL(0x2eea3d4), vector=XIL(0x14a4f45), maxdepth=XIL(0x16), args_template=XIL(0x402), nargs=1, args=0x7fffffffb750) at bytecode.c:641
#105 0x0000000000651573 in funcall_lambda (fun=XIL(0x14a4f6d), nargs=1, arg_vector=0x7fffffffb748) at eval.c:2944
#106 0x0000000000650986 in Ffuncall (nargs=2, args=0x7fffffffb740) at eval.c:2746
#107 0x00000000006a12f6 in exec_byte_code (bytestr=XIL(0x2eeafe4), vector=XIL(0x14a3dad), maxdepth=XIL(0x16), args_template=XIL(0x402), nargs=1, args=0x7fffffffbba8) at bytecode.c:641
#108 0x0000000000651573 in funcall_lambda (fun=XIL(0x14a3de5), nargs=1, arg_vector=0x7fffffffbba0) at eval.c:2944
#109 0x00000000006511ad in apply_lambda (fun=XIL(0x14a3de5), args=XIL(0x2f44b63), count=14) at eval.c:2881
#110 0x000000000064f449 in eval_sub (form=XIL(0x2f44b53)) at eval.c:2265
#111 0x0000000000649e8b in Fprogn (body=XIL(0x2f44b73)) at eval.c:449
#112 0x000000000064bc42 in Flet (args=XIL(0x2f44b43)) at eval.c:963
#113 0x000000000064ee7c in eval_sub (form=XIL(0x2f44b23)) at eval.c:2173
#114 0x000000000064e854 in Feval (form=XIL(0x2f44b23), lexical=XIL(0)) at eval.c:2042
#115 0x0000000000650e24 in funcall_subr (subr=0xd80af8 <Seval>, numargs=1, args=0x7fffffffc118) at eval.c:2821
#116 0x0000000000650952 in Ffuncall (nargs=2, args=0x7fffffffc110) at eval.c:2744
#117 0x00000000006a12f6 in exec_byte_code (bytestr=XIL(0xb1bdf4), vector=XIL(0xb1be15), maxdepth=XIL(0x5e), args_template=XIL(0x406), nargs=1, args=0x7fffffffca78) at bytecode.c:641
#118 0x0000000000651573 in funcall_lambda (fun=XIL(0xb1bdc5), nargs=1, arg_vector=0x7fffffffca70) at eval.c:2944
#119 0x0000000000650986 in Ffuncall (nargs=2, args=0x7fffffffca68) at eval.c:2746
#120 0x00000000006a12f6 in exec_byte_code (bytestr=XIL(0xb16404), vector=XIL(0xb16425), maxdepth=XIL(0x56), args_template=XIL(0x2), nargs=0, args=0x7fffffffd688) at bytecode.c:641
#121 0x0000000000651573 in funcall_lambda (fun=XIL(0xb163d5), nargs=0, arg_vector=0x7fffffffd688) at eval.c:2944
#122 0x0000000000650986 in Ffuncall (nargs=1, args=0x7fffffffd680) at eval.c:2746
#123 0x00000000006a12f6 in exec_byte_code (bytestr=XIL(0xb15354), vector=XIL(0xb15375), maxdepth=XIL(0x32), args_template=XIL(0x2), nargs=0, args=0x7fffffffdcc0) at bytecode.c:641
#124 0x0000000000651573 in funcall_lambda (fun=XIL(0xb15325), nargs=0, arg_vector=0x7fffffffdcc0) at eval.c:2944
#125 0x00000000006511ad in apply_lambda (fun=XIL(0xb15325), args=XIL(0), count=4) at eval.c:2881
#126 0x000000000064f449 in eval_sub (form=XIL(0x14dde43)) at eval.c:2265
#127 0x000000000064e854 in Feval (form=XIL(0x14dde43), lexical=XIL(0)) at eval.c:2042
#128 0x0000000000598073 in top_level_2 () at keyboard.c:1121
#129 0x000000000064cbc2 in internal_condition_case (bfun=0x598050 <top_level_2>, handlers=XIL(0x4dd0), hfun=0x597a55 <cmd_error>) at eval.c:1326
#130 0x00000000005980b8 in top_level_1 (ignore=XIL(0)) at keyboard.c:1129
#131 0x000000000064c0d4 in internal_catch (tag=XIL(0xbca0), func=0x598075 <top_level_1>, arg=XIL(0)) at eval.c:1091
#132 0x0000000000597fa2 in command_loop () at keyboard.c:1090
#133 0x000000000059753f in recursive_edit_1 () at keyboard.c:697
#134 0x0000000000597734 in Frecursive_edit () at keyboard.c:768
#135 0x00000000005952ef in main (argc=10, argv=0x7fffffffe208) at emacs.c:1690

Lisp Backtrace:
"Automatic GC" (0x0)
"run-hooks" (0xffff6e58)
"kill-buffer" (0xffff6f90)
"and" (0xffff7130)
"unwind-protect" (0xffff7370)
"save-current-buffer" (0xffff74e0)
"let" (0xffff76e0)
"regex-tests-BOOST-frob-escapes" (0xffff7830)
"let*" (0xffff7ae0)
"if" (0xffff7c60)
"progn" (0xffff7da0)
"if" (0xffff7ef0)
"let" (0xffff80f0)
"while" (0xffff8290)
"let" (0xffff84a0)
"progn" (0xffff85e0)
"unwind-protect" (0xffff8720)
"save-current-buffer" (0xffff8890)
"let" (0xffff8a90)
"let" (0xffff8cb0)
"regex-tests-BOOST" (0xffff8f08)
"apply" (0xffff8f00)
"setq" (0xffff9120)
"unwind-protect" (0xffff9260)
"not" (0xffff9370)
"if" (0xffff94c0)
"let" (0xffff96c0)
"let" (0xffff98c0)
"let" (0xffff9ac0)
0x2f3c030 Lisp type 3
"ert--run-test-internal" (0xffffa230)
"ert-run-test" (0xffffa7a8)
"ert-run-or-rerun-test" (0xffffad30)
"ert-run-tests" (0xffffb288)
"ert-run-tests-batch" (0xffffb748)
"ert-run-tests-batch-and-exit" (0xffffbba0)
"let" (0xffffbed0)
"eval" (0xffffc118)
"command-line-1" (0xffffca70)
"command-line" (0xffffd688)
"normal-top-level" (0xffffdcc0)