Your message dated Sun, 03 Aug 2025 19:20:49 -0400
with message-id <[email protected]>
and subject line Closing bug
has caused the Debian Bug report #1037031,
regarding gdb: std::length_error with tab-completion on Meson-built Rust program
to be marked as done.
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If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
1037031: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1037031
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: gdb
Version: 13.1-3
Severity: normal
X-Debbugs-Cc: [email protected]
Dear Maintainer,
I have a small project built with C and Rust using Meson. When I build
the project and try to set a breakpoint with tab-completion, GDB exits
with a std::length_error, seemingly only for some symbols.
I can't produce it with a Cargo-built program, but I can with a skeleton
Meson project, which I'll refer to for the rest of this report:
$ mkdir proj # or whatever
$ cd $_
$ meson init -l rust
[...]
$ meson setup build
[...]
$ meson compile -C build
[...]
$ gdb ./build/proj
[...]
warning: Missing auto-load script at offset 0 in section .debug_gdb_scripts
of file /tmp/proj/build/proj.
(gdb) b q<Tab>
*** nothing happens, just beeping
*** (if target is run first, includes e.g. 'qsort')
(gdb) b a<Tab><Tab>
Display all 145 possibilities? (y or n) y
[... symbols, including 'abbrev.rs' and
'alloc::alloc::box_free::h293b7814a118f9bc' ...]
(gdb) b c<Tab>
terminate called after throwing an instance of 'std::length_error'
what(): basic_string::_M_replace
Fatal signal: Aborted
----- Backtrace -----
[below]
---------------------
A fatal error internal to GDB has been detected, further
debugging is not possible. GDB will now terminate.
This is a bug, please report it. For instructions, see:
<https://www.gnu.org/software/gdb/bugs/>.
Aborted (core dumped)
The executable does work in lldb. Most of the rest of GDB probably
works, too; the completion seems to be the only broken thing.
A bunch of letters aside from 'c' (e.g. 'l', 'w') also crash; my guess
is that there's a bunch of functions that mess GDB up, and they're in
core:: or similar.
I'm running rustc from rustup, version
rustc 1.72.0-nightly (d59363ad0 2023-06-01)
I originally found it with
rustc 1.71.0-nightly (5ea3f0ae0 2023-05-23)
I've attached the backtrace below; my apologies for the missing symbols
before the abort(). It seems to be in a C++ destructor, but I can't
figure out which (or which package provides the symbols in question.)
----- Backtrace -----
0x55f3d0ab340e gdb_internal_backtrace_1
/build/gdb-kUlB6r/gdb-13.1/gdb/bt-utils.c:122
0x55f3d0ab340e _Z22gdb_internal_backtracev
/build/gdb-kUlB6r/gdb-13.1/gdb/bt-utils.c:168
0x55f3d0bbc601 handle_fatal_signal
/build/gdb-kUlB6r/gdb-13.1/gdb/event-top.c:956
0x7fbab3a5af8f ???
./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
0x7fbab3aa9ccc __pthread_kill_implementation
./nptl/pthread_kill.c:44
0x7fbab3a5aef1 __GI_raise
../sysdeps/posix/raise.c:26
0x7fbab3a45471 __GI_abort
./stdlib/abort.c:79
0x7fbab3c9d918 ???
0x7fbab3ca8e19 ???
0x7fbab3ca7e88 ???
0x7fbab3ca85a5 ???
0x7fbab49ce933 ???
0x7fbab49cf38c ???
0x55f3d09f9f49 _ZNKSt14default_deleteI13location_specEclEPS0_
/usr/include/c++/12/bits/unique_ptr.h:95
0x55f3d09f9f49 _ZNSt10unique_ptrI13location_specSt14default_deleteIS0_EED4Ev
/usr/include/c++/12/bits/unique_ptr.h:396
0x55f3d09f9f49
_Z18location_completerP16cmd_list_elementR18completion_trackerPKcS4_
/build/gdb-kUlB6r/gdb-13.1/gdb/completer.c:1042
0x55f3d0b131ca complete_line_internal_1
/build/gdb-kUlB6r/gdb-13.1/gdb/completer.c:1438
0x55f3d0b13245 complete_line_internal
/build/gdb-kUlB6r/gdb-13.1/gdb/completer.c:1457
0x55f3d0b1339a gdb_completion_word_break_characters_throw
/build/gdb-kUlB6r/gdb-13.1/gdb/completer.c:1907
0x55f3d0b1339a _Z36gdb_completion_word_break_charactersv
/build/gdb-kUlB6r/gdb-13.1/gdb/completer.c:1945
0x7fbab4c3dec5 _rl_find_completion_word
./complete.c:1091
0x7fbab4c3f263 rl_complete_internal
./complete.c:2027
0x7fbab4c3443f _rl_dispatch_subseq
./readline.c:916
0x7fbab4c34a8c readline_internal_char
./readline.c:675
0x7fbab4c52644 rl_callback_read_char
./callback.c:272
0x55f3d0bbd7fd gdb_rl_callback_read_char_wrapper_noexcept
/build/gdb-kUlB6r/gdb-13.1/gdb/event-top.c:188
0x55f3d0bbd98f gdb_rl_callback_read_char_wrapper
/build/gdb-kUlB6r/gdb-13.1/gdb/event-top.c:221
0x55f3d0bbcd0c stdin_event_handler
/build/gdb-kUlB6r/gdb-13.1/gdb/event-top.c:541
0x55f3d0fa41d5 gdb_wait_for_event
/build/gdb-kUlB6r/gdb-13.1/gdbsupport/event-loop.cc:716
0x55f3d0fa4cb2 _Z16gdb_do_one_eventi
/build/gdb-kUlB6r/gdb-13.1/gdbsupport/event-loop.cc:264
0x55f3d0c862f9 start_event_loop
/build/gdb-kUlB6r/gdb-13.1/gdb/main.c:411
0x55f3d0c862f9 captured_command_loop
/build/gdb-kUlB6r/gdb-13.1/gdb/main.c:471
0x55f3d0c87f74 captured_main
/build/gdb-kUlB6r/gdb-13.1/gdb/main.c:1330
0x55f3d0c87f74 _Z8gdb_mainP18captured_main_args
/build/gdb-kUlB6r/gdb-13.1/gdb/main.c:1345
0x55f3d0a16ca9 main
/build/gdb-kUlB6r/gdb-13.1/gdb/gdb.c:32
---------------------
-- System Information:
Debian Release: 12.0
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 6.1.0-9-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_WARN
Locale: LANG=en_CA.UTF-8, LC_CTYPE=en_CA.UTF-8 (charmap=UTF-8),
LANGUAGE=en_CA:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages gdb depends on:
ii libbabeltrace1 1.5.11-1+b2
ii libc6 2.36-9
ii libdebuginfod1 0.188-2.1
ii libexpat1 2.5.0-1
ii libgcc-s1 12.2.0-14
ii libgmp10 2:6.2.1+dfsg1-1.1
ii libipt2 2.0.5-1
ii liblzma5 5.4.1-0.2
ii libmpfr6 4.2.0-1
ii libncursesw6 6.4-4
ii libpython3.11 3.11.2-6
ii libreadline8 8.2-1.3
ii libsource-highlight4v5 3.1.9-4.2+b3
ii libstdc++6 12.2.0-14
ii libtinfo6 6.4-4
ii libxxhash0 0.8.1-1
ii libzstd1 1.5.4+dfsg2-5
ii zlib1g 1:1.2.13.dfsg-1
Versions of packages gdb recommends:
ii libc6-dbg [libc-dbg] 2.36-9
Versions of packages gdb suggests:
pn gdb-doc <none>
pn gdbserver <none>
-- no debconf information
--- End Message ---
--- Begin Message ---
I can't reproduce this with GDB 16.3 and rustc "1.85.0 (4d91de4e4
2025-02-17) (built from a source tarball)" from unstable.
I'm closing this bug; feel free to reopen if it's still applicable.
--
Sergio
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Please send encrypted e-mail if possible
https://sergiodj.net/
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--- End Message ---
