bug#60796: 27.1; Opening file ending in .sh inside a directory ending in .deb causes hang/100% thread usage

[Stephen Berman <stephen.berman@gmx.net>]

[-- Attachment #1: Type: text/plain, Size: 1986 bytes --]

On Sun, 15 Jan 2023 16:14:37 +0100 Michael Albinus <michael.albinus@gmx.de> wrote:

> Stephen Berman <stephen.berman@gmx.net> writes:
>
> H Stephen,
>
>>>> Oops, sorry, I just noticed the Cc on these emails that I should have
>>>> been using. Repeating what I said in (accidental) privacy:
>>>>
>>>> I installed Ubuntu Server 22.10 in a VM, booted, installed emacs-nox
>>>> package from repo, did mkdir asdf.deb, cd asdf.deb, emacs -Q, and the
>>>> problem happens there, in case that's useful. (v27.1)
>>>>
>>>> I realized that it doesn't matter what you are editing (if anything), it
>>>> just needs to be opened inside a directory ending in .deb.
>>>
>>> Maybe there are local Debian changes?  I suggest to report this to the
>>> distro first.
>>
>> I can reproduce the problem in my Emacs 27 branch from the Savannah repo
>> built on non-Debian GNU/Linux; I cannot reproduce it with Emacs 26 or 28
>> and later.  (Emacs 26 does not recognize tramp-archive-enabled, in 27
>> and later it does and the default value it t.)
>
> tramp-archive.el was added to Tramp 2.4 (Emacs 27) only, so it couldn't
> be a problem in Emacs 26.

Ah, ok.

> With the given scenario, I cannot reproduce it in either Emacs 27, 28,
> 29 and 30.
>
> $ mkdir test.deb
> $ cd test.deb
> $ emacs -Q test.sh
>
>
> Note that there was a similar report, bug#30293, which was fixed in
> Emacs 27. So in general the scenario shall work. If possible, I'd like
> to see a backtrace for the Emacs 27 case.

Do you mean from gdb?  If so, see below.

> Note also, that there were autoload problems in the past for
> tramp-archive.el (which should be fixed now). So would it work in your
> case, if you call instead
>
> $ emacs -Q -l tramp-archive test.sh

This doesn't prevent the freeze and 100% core usage for me.  I attached
the emacs process to gdb and append the backtrace below.  If this is not
what you want, or if you want me to execute specific gdb commands,
please let me know what I should do.

Steve Berman


[-- Attachment #2: backtrace --]
[-- Type: application/octet-stream, Size: 13514 bytes --]

steve [ ~/temp/test.deb ]$ /mnt/lfs2/home/steve/build/emacs-27/src/emacs -Q -l ~/src/emacs/emacs-27/lisp/net/tramp-archive.elc test.sh &
[2] 13753
steve [ ~/temp/test.deb ]$ gdb attach 13753
GNU gdb (GDB) 12.1
Copyright (C) 2022 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 "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
attach: No such file or directory.
Attaching to process 13753
[New LWP 13754]
[New LWP 13755]
[New LWP 13756]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
get_next_display_element (it=it@entry=0x7ffe17352d40) at /home/steve/src/emacs/emacs-27/src/xdisp.c:7632
7632	      if (it->what == IT_COMPOSITION && it->cmp_it.ch >= 0)
(gdb) 
(gdb) c
Continuing.
^Z
Thread 1 "emacs" received signal SIGTSTP, Stopped (user).
0x0000000000565c81 in survives_gc_p (obj=0x1ee4b83) at /home/steve/src/emacs/emacs-27/src/alloc.c:6684
6684	  switch (XTYPE (obj))
(gdb) bt full
#0  0x0000000000565c81 in survives_gc_p (obj=0x1ee4b83)
    at /home/steve/src/emacs/emacs-27/src/alloc.c:6684
        survives_p = <optimized out>
#1  0x0000000000592cd5 in sweep_weak_table
    (h=h@entry=0x7f008aba60b8, remove_entries_p=remove_entries_p@entry=false)
    at /home/steve/src/emacs/emacs-27/src/fns.c:4468
        key_known_to_survive_p = <optimized out>
        value_known_to_survive_p = <optimized out>
        remove_p = <optimized out>
        i = 73
        prev = -1
        next = <optimized out>
        bucket = 110
        n = 121
        marked = true
#2  0x0000000000560b8f in mark_and_sweep_weak_table_contents ()
    at /home/steve/src/emacs/emacs-27/src/alloc.c:5760
        h = 0x7f008aba60b8
        marked = false
#3  0x000000000056505e in garbage_collect ()
    at /home/steve/src/emacs/emacs-27/src/alloc.c:5981
        nextb = 0x0
        stack_top_variable = -1 '\377'
--Type <RET> for more, q to quit, c to continue without paging--c
        message_p = true
        count = 5
        tot_before = 18446744073709551615
#4  0x000000000056521a in maybe_garbage_collect () at /home/steve/src/emacs/emacs-27/src/alloc.c:5847
#5  0x00000000005820db in maybe_gc () at /home/steve/src/emacs/emacs-27/src/lisp.h:5066
#6  0x00000000005836ad in Ffuncall (nargs=3, args=args@entry=0x7ffe17353f48) at /home/steve/src/emacs/emacs-27/src/eval.c:2779
        fun = <optimized out>
        original_fun = <optimized out>
        funcar = <optimized out>
        numargs = 2
        val = <optimized out>
        count = 4
#7  0x00000000005bb3bb in exec_byte_code (bytestr=<optimized out>, vector=vector@entry=0x7f008b2351f5, maxdepth=maxdepth@entry=0x16, args_template=args_template@entry=0x202, nargs=nargs@entry=3, args=<optimized out>, args@entry=0x7ffe17354168) at /home/steve/src/emacs/emacs-27/src/bytecode.c:633
        op = <optimized out>
        type = <optimized out>
        targets = {0x5bcfe8 <exec_byte_code+8994>, 0x5bd001 <exec_byte_code+9019>, 0x5bd033 <exec_byte_code+9069>, 0x5bd035 <exec_byte_code+9071>, 0x5bd037 <exec_byte_code+9073>, 0x5bd001 <exec_byte_code+9019>, 0x5bd039 <exec_byte_code+9075>, 0x5bd070 <exec_byte_code+9130>, 0x5baf99 <exec_byte_code+723>, 0x5baffe <exec_byte_code+824>, 0x5bb000 <exec_byte_code+826>, 0x5bb002 <exec_byte_code+828>, 0x5bb004 <exec_byte_code+830>, 0x5baf99 <exec_byte_code+723>, 0x5bb006 <exec_byte_code+832>, 0x5baf84 <exec_byte_code+702>, 0x5bb1da <exec_byte_code+1300>, 0x5bb278 <exec_byte_code+1458>, 0x5bb27d <exec_byte_code+1463>, 0x5bb282 <exec_byte_code+1468>, 0x5bb287 <exec_byte_code+1473>, 0x5bb1da <exec_byte_code+1300>, 0x5bb2a4 <exec_byte_code+1502>, 0x5bb28c <exec_byte_code+1478>, 0x5bb319 <exec_byte_code+1619>, 0x5bb370 <exec_byte_code+1706>, 0x5bb372 <exec_byte_code+1708>, 0x5bb374 <exec_byte_code+1710>, 0x5bb376 <exec_byte_code+1712>, 0x5bb319 <exec_byte_code+1619>, 0x5bb2f9 <exec_byte_code+1587>, 0x5bb304 <exec_byte_code+1598>, 0x5bb398 <exec_byte_code+1746>, 0x5bb3d8 <exec_byte_code+1810>, 0x5bb3da <exec_byte_code+1812>, 0x5bb3dc <exec_byte_code+1814>, 0x5bb3de <exec_byte_code+1816>, 0x5bb398 <exec_byte_code+1746>, 0x5bb378 <exec_byte_code+1714>, 0x5bb383 <exec_byte_code+1725>, 0x5bb400 <exec_byte_code+1850>, 0x5bb442 <exec_byte_code+1916>, 0x5bb444 <exec_byte_code+1918>, 0x5bb446 <exec_byte_code+1920>, 0x5bb448 <exec_byte_code+1922>, 0x5bb400 <exec_byte_code+1850>, 0x5bb3e0 <exec_byte_code+1818>, 0x5bb3eb <exec_byte_code+1829>, 0x5bb9fb <exec_byte_code+3381>, 0x5bb9b4 <exec_byte_code+3310>, 0x5bb931 <exec_byte_code+3179>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bbb51 <exec_byte_code+3723>, 0x5bbc06 <exec_byte_code+3904>, 0x5bbc4d <exec_byte_code+3975>, 0x5bbc94 <exec_byte_code+4046>, 0x5bbcdb <exec_byte_code+4117>, 0x5bb0f1 <exec_byte_code+1067>, 0x5bb146 <exec_byte_code+1152>, 0x5bbd31 <exec_byte_code+4203>, 0x5bb094 <exec_byte_code+974>, 0x5bb17d <exec_byte_code+1207>, 0x5bbd78 <exec_byte_code+4274>, 0x5bbdaf <exec_byte_code+4329>, 0x5bbdd8 <exec_byte_code+4370>, 0x5bbe0f <exec_byte_code+4425>, 0x5bbe45 <exec_byte_code+4479>, 0x5bbec2 <exec_byte_code+4604>, 0x5bbeeb <exec_byte_code+4645>, 0x5bbf22 <exec_byte_code+4700>, 0x5bbf5f <exec_byte_code+4761>, 0x5bbf88 <exec_byte_code+4802>, 0x5bbfb1 <exec_byte_code+4843>, 0x5bbfe8 <exec_byte_code+4898>, 0x5bc01f <exec_byte_code+4953>, 0x5bc056 <exec_byte_code+5008>, 0x5bc093 <exec_byte_code+5069>, 0x5bc0c6 <exec_byte_code+5120>, 0x5bc0f9 <exec_byte_code+5171>, 0x5bc16f <exec_byte_code+5289>, 0x5bc1cd <exec_byte_code+5383>, 0x5bc22b <exec_byte_code+5477>, 0x5bc267 <exec_byte_code+5537>, 0x5bc2a3 <exec_byte_code+5597>, 0x5bc2df <exec_byte_code+5657>, 0x5bc31b <exec_byte_code+5717>, 0x5bc357 <exec_byte_code+5777>, 0x5bc38a <exec_byte_code+5828>, 0x5bc3f0 <exec_byte_code+5930>, 0x5bc423 <exec_byte_code+5981>, 0x5bc456 <exec_byte_code+6032>, 0x5bc489 <exec_byte_code+6083>, 0x5bc526 <exec_byte_code+6240>, 0x5bb84b <exec_byte_code+2949>, 0x5bc566 <exec_byte_code+6304>, 0x5bc58f <exec_byte_code+6345>, 0x5bc600 <exec_byte_code+6458>, 0x5bc640 <exec_byte_code+6522>, 0x5bc680 <exec_byte_code+6586>, 0x5bc6a9 <exec_byte_code+6627>, 0x5bc6d4 <exec_byte_code+6670>, 0x5bc6ff <exec_byte_code+6713>, 0x5bc732 <exec_byte_code+6764>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bc768 <exec_byte_code+6818>, 0x5bc793 <exec_byte_code+6861>, 0x5bc7be <exec_byte_code+6904>, 0x5bc7e9 <exec_byte_code+6947>, 0x5bc814 <exec_byte_code+6990>, 0x5bc83f <exec_byte_code+7033>, 0x5bb84b <exec_byte_code+2949>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bc868 <exec_byte_code+7074>, 0x5bc8a0 <exec_byte_code+7130>, 0x5bc8c9 <exec_byte_code+7171>, 0x5bc8f2 <exec_byte_code+7212>, 0x5bc929 <exec_byte_code+7267>, 0x5bc960 <exec_byte_code+7322>, 0x5bc989 <exec_byte_code+7363>, 0x5bca58 <exec_byte_code+7570>, 0x5bca8f <exec_byte_code+7625>, 0x5bcac6 <exec_byte_code+7680>, 0x5bcafd <exec_byte_code+7735>, 0x5bcb28 <exec_byte_code+7778>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bb7ec <exec_byte_code+2854>, 0x5bb479 <exec_byte_code+1971>, 0x5bb036 <exec_byte_code+880>, 0x5bb51c <exec_byte_code+2134>, 0x5bb57a <exec_byte_code+2228>, 0x5bb5c7 <exec_byte_code+2305>, 0x5bb79d <exec_byte_code+2775>, 0x5bb7cd <exec_byte_code+2823>, 0x5bb2d0 <exec_byte_code+1546>, 0x5bb82c <exec_byte_code+2918>, 0x5bb86a <exec_byte_code+2980>, 0x5bb8c9 <exec_byte_code+3075>, 0x5bb8f5 <exec_byte_code+3119>, 0x5bba28 <exec_byte_code+3426>, 0x5bba74 <exec_byte_code+3502>, 0x5bbab1 <exec_byte_code+3563>, 0x5bbaf8 <exec_byte_code+3634>, 0x5bb44a <exec_byte_code+1924>, 0x5bcb51 <exec_byte_code+7819>, 0x5bcb8e <exec_byte_code+7880>, 0x5bcbb7 <exec_byte_code+7921>, 0x5bcbe0 <exec_byte_code+7962>, 0x5bcc09 <exec_byte_code+8003>, 0x5bcc32 <exec_byte_code+8044>, 0x5bcc69 <exec_byte_code+8099>, 0x5bcca0 <exec_byte_code+8154>, 0x5bccd7 <exec_byte_code+8209>, 0x5bcd0e <exec_byte_code+8264>, 0x5bcdd0 <exec_byte_code+8458>, 0x5bce07 <exec_byte_code+8513>, 0x5bce3e <exec_byte_code+8568>, 0x5bce67 <exec_byte_code+8609>, 0x5bce9e <exec_byte_code+8664>, 0x5bced5 <exec_byte_code+8719>, 0x5bcefe <exec_byte_code+8760>, 0x5bcf27 <exec_byte_code+8801>, 0x5bc4bc <exec_byte_code+6134>, 0x5bc4ef <exec_byte_code+6185>, 0x5bcf5a <exec_byte_code+8852>, 0x5bcfa1 <exec_byte_code+8923>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bb614 <exec_byte_code+2382>, 0x5bb667 <exec_byte_code+2465>, 0x5bb6bd <exec_byte_code+2551>, 0x5bb713 <exec_byte_code+2637>, 0x5bb758 <exec_byte_code+2706>, 0x5bbe7f <exec_byte_code+4537>, 0x5bc12c <exec_byte_code+5222>, 0x5bc5bd <exec_byte_code+6391>, 0x5bd0b1 <exec_byte_code+9195>, 0x5bd0f0 <exec_byte_code+9258>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bd13b <exec_byte_code+9333>, 0x5bd185 <exec_byte_code+9407>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bcfe8 <exec_byte_code+8994>, 0x5bd256 <exec_byte_code+9616> <repeats 64 times>}
        bytestr_length = 10
        vectorp = 0x7f008b2351f8
        quitcounter = 1 '\001'
        stack_items = <optimized out>
        sa_avail = <optimized out>
        sa_count = 4
        alloc = <optimized out>
        item_bytes = <optimized out>
        stack_base = <optimized out>
        top = 0x7ffe17353f48
        stack_lim = <optimized out>
        bytestr_data = 0x7ffe17353f60 "\300\302\002\"\300\301\003\"\210\207["
        pc = 0x7ffe17353f68 "\210\207["
        count = 4
        result = <optimized out>
#8  0x000000000058608e in funcall_lambda (fun=fun@entry=0x7f008b2351c5, nargs=nargs@entry=3, arg_vector=arg_vector@entry=0x7ffe17354168) at /home/steve/src/emacs/emacs-27/src/eval.c:2990
        size = <optimized out>
        val = <optimized out>
        syms_left = 0x202
        next = <optimized out>
        lexenv = <optimized out>
        count = 4
        i = <optimized out>
        optional = <optimized out>
        rest = <optimized out>
#9  0x000000000058383a in Ffuncall (nargs=nargs@entry=4, args=args@entry=0x7ffe17354160) at /home/steve/src/emacs/emacs-27/src/eval.c:2797
        fun = 0x7f008b2351c5
        original_fun = 0x7f008b2351c5
        funcar = <optimized out>
        numargs = 3
        val = <optimized out>
        count = 3
#10 0x0000000000586cc9 in call3 (fn=<optimized out>, arg1=arg1@entry=0x21292f3, arg2=<optimized out>, arg3=arg3@entry=0x16a1de0) at /home/steve/src/emacs/emacs-27/src/eval.c:2669
#11 0x000000000050b238 in cmd_error_internal (data=data@entry=0x21292f3, context=context@entry=0x7ffe173541c0 "") at /home/steve/src/emacs/emacs-27/src/keyboard.c:984
#12 0x000000000050b369 in cmd_error (data=0x21292f3) at /home/steve/src/emacs/emacs-27/src/keyboard.c:953
        old_level = 0x0
        old_length = 0x0
        macroerror = "\000\361\246", '\000' <repeats 13 times>, "[\202#\213\000\177\000\000\000\000\000\000\000\000\000\000\271\021X\000\000\000\000\000b(X\000\000\000\000\000\003"
#13 0x0000000000582af9 in internal_condition_case (bfun=bfun@entry=0x515bec <command_loop_1>, handlers=<optimized out>, hfun=hfun@entry=0x50b253 <cmd_error>) at /home/steve/src/emacs/emacs-27/src/eval.c:1352
        val = <optimized out>
        c = 0x1577260
#14 0x00000000005060f1 in command_loop_2 (ignore=ignore@entry=0x0) at /home/steve/src/emacs/emacs-27/src/keyboard.c:1091
        val = <optimized out>
#15 0x0000000000582a7c in internal_catch (tag=tag@entry=0xd500, func=func@entry=0x5060d1 <command_loop_2>, arg=arg@entry=0x0) at /home/steve/src/emacs/emacs-27/src/eval.c:1117
        val = <optimized out>
        c = 0x1557c50
#16 0x00000000005060af in command_loop () at /home/steve/src/emacs/emacs-27/src/keyboard.c:1070
#17 0x000000000050ae9d in recursive_edit_1 () at /home/steve/src/emacs/emacs-27/src/keyboard.c:714
        count = 1
        val = <optimized out>
#18 0x000000000050b174 in Frecursive_edit () at /home/steve/src/emacs/emacs-27/src/keyboard.c:786
        count = 0
        buffer = <optimized out>
#19 0x0000000000505245 in main (argc=5, argv=<optimized out>) at /home/steve/src/emacs/emacs-27/src/emacs.c:2067
        stack_bottom_variable = 0x7f008b6e7f3c <_asn1_delete_list+28>
        do_initial_setlocale = <optimized out>
        no_loadup = false
        junk = 0x0
        dname_arg = 0x0
        ch_to_dir = 0x0
        original_pwd = <optimized out>
        dump_mode = <optimized out>
        skip_args = 0
        temacs = 0x0
        attempt_load_pdump = <optimized out>
        rlim = {rlim_cur = 10022912, rlim_max = 18446744073709551615}
        sockfd = -1
        module_assertions = <optimized out>
(gdb) k
Kill the program being debugged? (y or n) y
[Inferior 1 (process 13753) killed]
(gdb) q
[2]+  Killed                  /mnt/lfs2/home/steve/build/emacs-27/src/emacs -Q -l ~/src/emacs/emacs-27/lisp/net/tramp-archive.elc test.sh
steve [ ~/temp/test.deb ]$