From: Bello Olamide Date: Wed, 11 Feb 2026 08:05:45 GMT Subject: Re: [Outreachy PATCH v6 1/3] environment: stop storing `core.attributesFile` globally Message-ID: In-Reply-To: <0a45d72a-2a11-4363-ad2b-9fabff70bc9f@gmail.com> On Tue, 10 Feb 2026 at 16:07, Phillip Wood wrote: > > On 10/02/2026 10:17, Bello Caleb Olamide wrote: > > > Initialized empty Git repository in /home/ubuntu/Code/open_source/git/t/trash directory.t4027-diff-submodule/sub/.git/ > > [master (root-commit) 4431e0b] submodule > > Author: A U Thor > > 1 file changed, 1 insertion(+) > > create mode 100644 world > > BUG: repository.c:56: trying to read config from wrong repository instance > > Aborted (core dumped) > > What does the backtrace show if you load the coredump into gdb? If > you're using systemd you should be able to run > > coredumpctl gdb > > to start gdb on the last coredump (you can list them with "coredumpctl > list" if you need to select a different one) and then you can run > > bt full > > in gdb to get a backtrace. > > If you have an actual coredump file then you can just run "gdb > path/to/coredump" > Thank you Phillip. I have been able to generate the backtrace coredumpctl gdb PID: 43422 (git) UID: 1000 (ubuntu) GID: 1000 (ubuntu) Signal: 6 (ABRT) Timestamp: Wed 2026-02-11 08:43:11 WAT (15s ago) Command Line: git submodule--helper add -- ./S Executable: /home/ubuntu/Code/open_source/git/git Control Group: /user.slice/user-1000.slice/user@1000.service/app.slice/app-org.gnome.Terminal.slice/vte-spawn-29116a64-3a3d-4a87-b321-1dd9a0e862c7.scope Unit: user@1000.service User Unit: vte-spawn-29116a64-3a3d-4a87-b321-1dd9a0e862c7.scope Slice: user-1000.slice Owner UID: 1000 (ubuntu) Boot ID: a3430056a91d43f49b602796f4eafc8c Machine ID: 4fb1781ac9f64d5cad47e77f1ed4f268 Hostname: ubuntu Storage: /var/lib/systemd/coredump/core.git.1000.a3430056a91d43f49b602796f4eafc8c.43422.1770795791000000.zst (present) Disk Size: 43.4K Message: Process 43422 (git) of user 1000 dumped core. Found module /home/ubuntu/Code/open_source/git/git with build-id: d3afb1a6b38e0303f833747d30b120a5c520f40e Found module linux-vdso.so.1 with build-id: c1c6868625bceb6f487c419392bd09e4edbfc5d9 Found module libc.so.6 with build-id: 9f32d43c341bff10b9e7196738eedcfc4f3cc36c Found module libz.so.1 with build-id: b781927da654e744ed29ff39815bef9c750eaf24 Found module libc_malloc_debug.so.0 with build-id: 1e0d2faf0cfdf8b3b9940dc5937792836187f911 Stack trace of thread 43422: #0 0x0000ffffb8802008 __pthread_kill_implementation (libc.so.6 + 0x82008) #1 0x0000ffffb87ba83c __GI_raise (libc.so.6 + 0x3a83c) #2 0x0000ffffb87a7134 __GI_abort (libc.so.6 + 0x27134) #3 0x0000aaaab14af398 n/a (/home/ubuntu/Code/open_source/git/git + 0x39f398) #4 0x0000aaaab14af398 n/a (/home/ubuntu/Code/open_source/git/git + 0x39f398) #5 0x0000aaaab14af454 n/a (/home/ubuntu/Code/open_source/git/git + 0x39f454) #6 0x0000aaaab14257ac n/a (/home/ubuntu/Code/open_source/git/git + 0x3157ac) #7 0x0000aaaab1425890 n/a (/home/ubuntu/Code/open_source/git/git + 0x315890) #8 0x0000aaaab142609c n/a (/home/ubuntu/Code/open_source/git/git + 0x31609c) #9 0x0000aaaab142625c n/a (/home/ubuntu/Code/open_source/git/git + 0x31625c) #10 0x0000aaaab13eeedc n/a (/home/ubuntu/Code/open_source/git/git + 0x2deedc) #11 0x0000aaaab13eeab8 n/a (/home/ubuntu/Code/open_source/git/git + 0x2deab8) #12 0x0000aaaab1249088 n/a (/home/ubuntu/Code/open_source/git/git + 0x139088) #13 0x0000aaaab1249650 n/a (/home/ubuntu/Code/open_source/git/git + 0x139650) #14 0x0000aaaab1249c84 n/a (/home/ubuntu/Code/open_source/git/git + 0x139c84) #15 0x0000aaaab1132314 n/a (/home/ubuntu/Code/open_source/git/git + 0x22314) #16 0x0000aaaab11328b0 n/a (/home/ubuntu/Code/open_source/git/git + 0x228b0) #17 0x0000aaaab1132bd4 n/a (/home/ubuntu/Code/open_source/git/git + 0x22bd4) #18 0x0000aaaab1133074 n/a (/home/ubuntu/Code/open_source/git/git + 0x23074) #19 0x0000aaaab125e86c n/a (/home/ubuntu/Code/open_source/git/git + 0x14e86c) #20 0x0000ffffb87a7400 __libc_start_call_main (libc.so.6 + 0x27400) #21 0x0000ffffb89cf370 n/a (n/a + 0x0) #22 0x0000ffffb89cf370 n/a (n/a + 0x0) #23 0x3d455441445f524f n/a (n/a + 0x0) GNU gdb (Ubuntu 12.1-0ubuntu1~22.04.2) 12.1 Copyright (C) 2022 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later 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 "aarch64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /home/ubuntu/Code/open_source/git/git... [New LWP 43422] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/aarch64-linux-gnu/libthread_db.so.1". Core was generated by `git submodule--helper add -- ./S'. Program terminated with signal SIGABRT, Aborted. #0 __pthread_kill_implementation (threadid=281473778995232, signo=signo@entry=6, no_tid=no_tid@entry=0) at ./nptl/pthread_kill.c:44 44 ./nptl/pthread_kill.c: No such file or directory. (gdb) bt full #0 __pthread_kill_implementation (threadid=281473778995232, signo=signo@entry=6, no_tid=no_tid@entry=0) at ./nptl/pthread_kill.c:44 tid = 43422 ret = 0 pd = 0xffffb89c5020 old_mask = {__val = {16453191242184589568, 281474327489088, 187650095641156, 281474327489568, 281474327489568, 281474327489520, 18446743528248704984, 17298308644996116495, 17298308644996116495, 17298308644996116480, 16453191242184589568, 281474327488672, 187650095637040, 281474327488752, 18446743042917400560, 281474327489088}} ret = #1 0x0000ffffb8802054 in __pthread_kill_internal (signo=6, threadid=) at ./nptl/pthread_kill.c:78 No locals. #2 0x0000ffffb87ba83c in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26 ret = #3 0x0000ffffb87a7134 in __GI_abort () at ./stdlib/abort.c:79 save_stage = 1 act = {__sigaction_handler = {sa_handler = 0xaaaad0012bfb, sa_sigaction = 0xaaaad0012bfb}, sa_mask = {__val = {187650610900023, 0, 0, 0, 0, 0, 4294967295, 0, 187651416064000, 0, 281473778608136, 281474327489232, 187650095641436, 281474327489264, 281473778608284, 187650610899888}}, sa_flags = -1, sa_restorer = 0x88} sigs = {__val = {32, 187650096456616, 243494161448, 187650096456672, 281474327489824, 8099004987637978434, 3348833620946678639, 18374721914061273699, 281474327488992, 281474904195073, 187650610899963, 187650610899963, 187650610899963, 187650610899963, 187650610899964, 187650610900023}} #4 0x0000aaaab14af398 in BUG_vfl (file=0xaaaab15763e0 "repository.c", line=56, fmt=0xaaaab15763a8 "trying to read config from wrong repository instance", params=...) at usage.c:350 params_copy = {__stack = 0xffffd94dac20, __gr_top = 0xffffd94dac20, __vr_top = 0xffffd94dabf0, __gr_offs = -40, __vr_offs = -128} in_bug = 1 #5 0x0000aaaab14af454 in BUG_fl (file=0xaaaab15763e0 "repository.c", line=56, fmt=0xaaaab15763a8 "trying to read config from wrong repository instance") --Type for more, q to quit, c to continue without paging-- at usage.c:360 ap = {__stack = 0xffffd94dac20, __gr_top = 0xffffd94dac20, __vr_top = 0xffffd94dabf0, __gr_offs = -40, __vr_offs = -128} #6 0x0000aaaab14257ac in repo_config_values (repo=0xaaaad0012900) at repository.c:56 No locals. #7 0x0000aaaab1425890 in initialize_repository (repo=0xaaaad0012900) at repository.c:73 No locals. #8 0x0000aaaab142609c in repo_init (repo=0xaaaad0012900, gitdir=0xaaaad0012b10 "/home/ubuntu/Code/open_source/git/t/trash directory.t7422-submodule-output/S/.git", worktree=0xaaaad0012bb0 "/home/ubuntu/Code/open_source/git/t/trash directory.t7422-submodule-output/S") at repository.c:284 format = {version = -1, precious_objects = 0, partial_clone = 0x0, worktree_config = 0, relative_worktrees = 0, is_bare = -1, hash_algo = 1, compat_hash_algo = 0, ref_storage_format = REF_STORAGE_FORMAT_FILES, sparse_index = 0, work_tree = 0x0, unknown_extensions = {items = 0x0, nr = 0, alloc = 0, strdup_strings = 1, cmp = 0x0}, v1_only_extensions = { items = 0x0, nr = 0, alloc = 0, strdup_strings = 1, cmp = 0x0}} #9 0x0000aaaab142625c in repo_submodule_init (subrepo=0xaaaad0012900, superproject=0xaaaab1656c98 , path=0xaaaad0012080 "S", treeish_name=0xaaaab1558cc8 ) at repository.c:329 gitdir = {alloc = 136, len = 81, buf = 0xaaaad0012b10 "/home/ubuntu/Code/open_source/git/t/trash directory.t7422-submodule-output/S/.git"} worktree = {alloc = 136, len = 76, buf = 0xaaaad0012bb0 "/home/ubuntu/Code/open_source/git/t/trash directory.t7422-submodule-output/S"} ret = 0 #10 0x0000aaaab13eeedc in repo_get_submodule_ref_store ( repo=0xaaaab1656c98 , submodule=0xaaaad0012080 "S") at refs.c:2258 submodule_sb = {alloc = 24, len = 6, buf = 0xaaaad0012500 "S/.git"} refs = 0x0 to_free = 0x0 len = 1 subrepo = 0xaaaad0012900 --Type for more, q to quit, c to continue without paging-- #11 0x0000aaaab13eeab8 in repo_resolve_gitlink_ref (r=0xaaaab1656c98 , submodule=0xaaaad0012080 "S", refname=0xaaaab1537d50 "HEAD", oid=0xffffd94dae80) at refs.c:2141 refs = 0x1 flags = 1 #12 0x0000aaaab1249088 in die_on_repo_without_commits (path=0xaaaad0012080 "S") at builtin/submodule--helper.c:3423 oid = {hash = '\000' , "\200 \001\u042a\252\000", algo = 0} sb = {alloc = 24, len = 1, buf = 0xaaaad00125f0 "S"} #13 0x0000aaaab1249650 in module_add (argc=1, argv=0xaaaad0010ce0, prefix=0x0, repo=0xaaaab1656c98 ) at builtin/submodule--helper.c:3522 force = 0 quiet = 0 progress = 0 dissociate = 0 add_data = {prefix = 0x0, branch = 0x0, reference_path = 0x0, sm_path = 0xaaaad0012080 "S", sm_name = 0x0, repo = 0xaaaad0010ae0 "./S", realrepo = 0xaaaad0012590 "/home/ubuntu/Code/open_source/git/t/trash directory.t7422-submodule-output/S", ref_storage_format = REF_STORAGE_FORMAT_UNKNOWN, depth = -1, force = 0, quiet = 0, progress = 0, dissociate = 0} ref_storage_format = 0x0 to_free = 0xaaaad0012590 "/home/ubuntu/Code/open_source/git/t/trash directory.t7422-submodule-output/S" existing = 0xaaaab156aa08 buf = {alloc = 0, len = 0, buf = 0xaaaab16572f8 ""} sm_name_to_free = 0x0 options = {{type = OPTION_STRING, short_name = 98, long_name = 0xaaaab1539658 "branch", value = 0xffffd94daf60, precision = 0, argh = 0xaaaab1539658 "branch", help = 0xaaaab1539c80 "branch of repository to add as submodule", flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0x0}, {type = OPTION_COUNTUP, short_name = 102, long_name = 0xaaaab1538070 "force", value = 0xffffd94daee8, precision = 4, argh = 0x0, help = 0xaaaab1539cb0 "allow adding an otherwise ignored submodule path", flags = (PARSE_OPT_NOARG | PARSE_OPT_NOCOMPLETE), callback = 0x0, --Type for more, q to quit, c to continue without paging-- defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0x0}, { type = OPTION_COUNTUP, short_name = 113, long_name = 0xaaaab15375e0 "quiet", value = 0xffffd94daeec, precision = 4, argh = 0x0, help = 0xaaaab1539748 "print only error messages", flags = PARSE_OPT_NOARG, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0x0}, {type = OPTION_SET_INT, short_name = 0, long_name = 0xaaaab15387a0 "progress", value = 0xffffd94daef0, precision = 4, argh = 0x0, help = 0xaaaab15387b0 "force cloning progress", flags = PARSE_OPT_NOARG, callback = 0x0, defval = 1, ll_callback = 0x0, extra = 0, subcommand_fn = 0x0}, {type = OPTION_STRING, short_name = 0, long_name = 0xaaaab15386a8 "reference", value = 0xffffd94daf68, precision = 0, argh = 0xaaaab1539ce8 "repository", help = 0xaaaab15386c0 "reference repository", flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0x0}, { type = OPTION_STRING, short_name = 0, long_name = 0xaaaab15386d8 "ref-format", value = 0xffffd94daf00, precision = 0, argh = 0xaaaab15386e8 "format", help = 0xaaaab15386f0 "specify the reference format to use", flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0x0}, {type = OPTION_SET_INT, short_name = 0, long_name = 0xaaaab1538718 "dissociate", value = 0xffffd94daef4, precision = 4, argh = 0x0, help = 0xaaaab1539cf8 "borrow the objects from reference repositories", flags = PARSE_OPT_NOARG, callback = 0x0, defval = 1, ll_callback = 0x0, extra = 0, subcommand_fn = 0x0}, {type = OPTION_STRING, short_name = 0, long_name = 0xaaaab1538648 "name", value = 0xffffd94daf78, precision = 0, argh = 0xaaaab1538648 "name", help = 0xaaaab1539d28 "sets the submodule's name to the given string instead of defaulting to its path", flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0x0}, {type = OPTION_INTEGER, short_name = 0, long_name = 0xaaaab1538750 "depth", value = 0xffffd94daf94, precision = 4, argh = 0xaaaab1537cf0 "n", help = 0xaaaab1538758 "depth for shallow clones", flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0x0}, {type = OPTION_END, short_name = 0, long_name = 0x0, value = 0x0, precision = 0, argh = 0x0, help = 0x0, flags = 0, --Type for more, q to quit, c to continue without paging-- callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0x0}} usage = { 0xaaaab1539d78 "git submodule add [] [--] []", 0x0} sb = {alloc = 0, len = 0, buf = 0xaaaab16572f8 ""} ret = 1 #14 0x0000aaaab1249c84 in cmd_submodule__helper (argc=3, argv=0xaaaad0010ce0, prefix=0x0, repo=0xaaaab1656c98 ) at builtin/submodule--helper.c:3616 fn = 0xaaaab12490dc usage = {0xaaaab1539ec0 "git submodule--helper ", 0x0} options = {{type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab15384b8 "clone", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab124403c }, {type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab1539b98 "add", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab12490dc }, {type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab1538f78 "update", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab1246e44 }, { type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab1537500 "foreach", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab123fe24 }, { type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab1539110 "init", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab1240418 }, {type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab15378e8 "status", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, --Type for more, q to quit, c to continue without paging-- callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab1240ca8 }, { type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab1537e48 "sync", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab1242a0c }, {type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab1539ee0 "deinit", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab1243074 }, { type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab1539ee8 "summary", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab1242164 }, { type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab1539ef0 "push-check", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab12476f4 }, {type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab1539f00 "absorbgitdirs", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab12479a8 }, { type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab1539f10 "set-url", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab1247b40 }, { type = OPTION_SUBCOMMAND, short_name = 0, long_name = 0xaaaab1539f18 "set-branch", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab1247d74 }, { type = OPTION_SUBCOMMAND, short_name = 0, --Type for more, q to quit, c to continue without paging-- long_name = 0xaaaab1539f28 "create-branch", value = 0xffffd94db430, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0xaaaab1248038 }, { type = OPTION_END, short_name = 0, long_name = 0x0, value = 0x0, precision = 0, argh = 0x0, help = 0x0, flags = 0, callback = 0x0, defval = 0, ll_callback = 0x0, extra = 0, subcommand_fn = 0x0}} #15 0x0000aaaab1132314 in run_builtin (p=0xaaaab1624be8 , argc=4, argv=0xaaaad0010ce0, repo=0xaaaab1656c98 ) at git.c:506 status = 0 help = 0 no_repo = 0 st = {st_dev = 187650095680628, st_ino = 281474327493248, st_mode = 2974518388, st_nlink = 43690, st_uid = 3645750856, st_gid = 65535, st_rdev = 5, __pad1 = 187650097155112, st_size = 281473779032128, st_blksize = -1322915768, __pad2 = 43690, st_blocks = 40, st_atim = { tv_sec = 281474327493280, tv_nsec = 187650091976020}, st_mtim = { tv_sec = 5, tv_nsec = 8}, st_ctim = {tv_sec = 281474327493408, tv_nsec = 187650091985032}, __glibc_reserved = {8, 0}} prefix = 0x0 run_setup = 1 __PRETTY_FUNCTION__ = "run_builtin" #16 0x0000aaaab11328b0 in handle_builtin (args=0xffffd94dbc50) at git.c:779 argv_copy = 0xaaaad0010ce0 ret = 43690 cmd = 0xaaaad00109b0 "submodule--helper" builtin = 0xaaaab1624be8 #17 0x0000aaaab1132bd4 in run_argv (args=0xffffd94dbc50) at git.c:862 done_alias = 0 expanded_aliases = {items = 0x0, nr = 0, alloc = 0, strdup_strings = 1, cmp = 0x0} #18 0x0000aaaab1133074 in cmd_main (argc=4, argv=0xffffd94dbe50) at git.c:984 was_alias = 65535 args = {v = 0xaaaad00109d0, nr = 4, alloc = 24} cmd = 0xffffd94dc7ff "submodule--helper" done_help = 0 --Type for more, q to quit, c to continue without paging-- #19 0x0000aaaab125e86c in main (argc=5, argv=0xffffd94dbe48) at common-main.c:9 result = 0