JS ERROR: TypeError: malformed UTF-8 character sequence at offset 0 and segfault in _filterKeybinding:windowManager.js:1825 from invoke_handler() from process_event() from process_special_modifier_key()

apport-retrace --gdb --sandbox system --cache ~/.cache/apport-retrace /var/crash/_usr_bin_gnome-shell.1000.crash

...

Program terminated with signal SIGSEGV, Segmentation fault.
#0 __GI_raise (sig=<optimized out>) at ../sysdeps/unix/sysv/linux/raise.c:50
50 ../sysdeps/unix/sysv/linux/raise.c: Toks failas ar aplankas neegzistuoja.
[Current thread is 1 (Thread 0x7f5c91796cc0 (LWP 3417))]
(gdb) bt
#0 __GI_raise (sig=<optimized out>) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x000056068ef0852a in dump_gjs_stack_on_signal_handler ()
#2 <signal handler called>
#3 0x00005606b18aca40 in ?? ()
#4 0x00007f5c971a9f11 in invoke_handler (binding=0x56069dc351c0, event=0x5606b4c878c0, window=0x56069dc351c0, handler=<optimized out>,
    display=0x5606900e0020) at ../src/core/keybindings.c:1921
#5 process_event (display=display@entry=0x5606900e0020, window=window@entry=0x56069e5ad220, event=event@entry=0x5606b4c878c0)
    at ../src/core/keybindings.c:2005
#6 0x00007f5c971ab83e in process_special_modifier_key (display=display@entry=0x5606900e0020, event=event@entry=0x5606b4c878c0,
    window=window@entry=0x56069e5ad220, modifier_press_only=modifier_press_only@entry=0x5606900e01a8,
    resolved_key_combo=resolved_key_combo@entry=0x5606900e0198, trigger_callback=0x7f5c971a5100 <meta_display_overlay_key_activate>)
    at ../src/core/keybindings.c:2051
#7 0x00007f5c971ac976 in process_overlay_key (window=0x56069e5ad220, event=0x5606b4c878c0, display=0x5606900e0020)
    at ../src/core/keybindings.c:2151
#8 process_key_event (event=0x5606b4c878c0, window=0x56069e5ad220, display=0x5606900e0020) at ../src/core/keybindings.c:2228
#9 meta_keybindings_process_event (display=display@entry=0x5606900e0020, window=window@entry=0x56069e5ad220,
    event=event@entry=0x5606b4c878c0) at ../src/core/keybindings.c:2326
#10 0x00007f5c971a801c in meta_display_handle_event (event=0x5606b4c878c0, display=0x5606900e0020) at ../src/core/events.c:358
#11 event_callback (event=0x5606b4c878c0, data=0x5606900e0020) at ../src/core/events.c:479
#12 0x00007f5c97368235 in _clutter_event_process_filters ()
   from /tmp/apport_sandbox_6sb0y3pp/usr/lib/x86_64-linux-gnu/mutter-5/libmutter-clutter-5.so.0
#13 0x00007f5c9737e585 in emit_keyboard_event ()
   from /tmp/apport_sandbox_6sb0y3pp/usr/lib/x86_64-linux-gnu/mutter-5/libmutter-clutter-5.so.0
#14 0x00007f5c9721c0e0 in meta_input_device_native_process_kbd_a11y_event (event=0x5606b4c878c0, device=0x56068fd782b0,
    emit_event_func=0x7f5c9737e570 <emit_keyboard_event>) at ../src/backends/native/meta-input-device-native.c:1195
#15 0x00007f5c9737fa36 in _clutter_process_event ()
   from /tmp/apport_sandbox_6sb0y3pp/usr/lib/x86_64-linux-gnu/mutter-5/libmutter-clutter-5.so.0
#16 0x00007f5c97399d08 in _clutter_stage_queue_event ()
   from /tmp/apport_sandbox_6sb0y3pp/usr/lib/x86_64-linux-gnu/mutter-5/libmutter-clutter-5.so.0
#17 0x00007f5c9721901c in meta_event_dispatch (g_source=<optimized out>, callback=<optimized out>, user_data=<optimized out>)
    at ../src/backends/native/meta-device-manager-native.c:686
#18 0x00007f5c97cf984d in g_main_context_dispatch () from /tmp/apport_sandbox_6sb0y3pp/usr/lib/x86_64-linux-gnu/libglib-2.0.s...

The JS traceback points to this line:
https://gitlab.gnome.org/GNOME/gnome-shell/blob/3913fa5044b2cd1d5abadc9b4254d06215491458/js/ui/windowManager.js#L1771

(GitLab commit doesn't match gnome-shell from Ubuntu 19.10, sorry! I didn't have the time to go hunt for the exact commit that corresponds to the package, instead I extracted the source file with gresource extract /usr/lib/gnome-shell/libgnome-shell.so /org/gnome/shell/ui/windowManager.js, looked up the line, then found the same code in the same function in the current gitlab tree.)

The column points to the `binding.get_name()` call.

Upstream bug report: https://gitlab.gnome.org/GNOME/gnome-shell/issues/1870

Are you able to fully update the machine, reproduce the crash and create a fresh report? That might be easier to debug.

Unfortunately I was unable to reproduce the bug.

OK, incomplete then. I have detached https://gitlab.gnome.org/GNOME/gnome-shell/issues/1870 so that the bug can expire if there is still no news in 60 days.

[Expired for gnome-shell (Ubuntu) because there has been no activity for 60 days.]