anki: SIGSEGV error crash

[egorkonovalov]

Nixpkgs version

• Unstable (26.05)

Describe the bug

Anki crashes when ANKI_WAYLAND=0 (default)

Steps to reproduce

1. Run Anki normally
2. Open up any card in edit mode
3. Set the Front input to hidden state like on the screenshot
4. Try to open it back again

Expected behaviour

The Front input shows up

Screenshots

Relevant log output

anki
Starting Anki 25.09.2...
Wayland support is disabled by default due to bugs:
https://github.com/ankitects/anki/issues/1767
You can force it on with an env var: ANKI_WAYLAND=1
2026-02-16 12:43:09,953:INFO:aqt.mediasrv: Serving on http://127.0.0.1:46505
Starting main loop...
JS warning /_anki/js/vendor/mathjax/tex-chtml-full.js:1 No version information available for component [tex]/noerrors
JS warning /_anki/js/vendor/mathjax/tex-chtml-full.js:1 No version information available for component [tex]/mathtools
JS warning /_anki/js/editor.js:439 No version information available for component [tex]/noerrors
JS warning /_anki/js/editor.js:439 No version information available for component [tex]/mathtools
Received signal 11 SEGV_MAPERR 000000000000
#0 0x7f2871691f05 base::debug::CollectStackTrace()
#1 0x7f2871677bf4 base::debug::StackTrace::StackTrace()
#2 0x7f287169265a base::debug::(anonymous namespace)::StackDumpSignalHandler()
#3 0x7f2893442790 (/nix/store/wb6rhpznjfczwlwx23zmdrrw74bayxw4-glibc-2.42-47/lib/libc.so.6+0x4278f)
#4 0x7f286c2ca773 ui::BrowserAccessibilityManagerQt::FireGeneratedEvent()
#5 0x7f287343cd83 ui::BrowserAccessibilityManager::OnAccessibilityEvents()
#6 0x7f286ff01f31 content::RenderFrameHostImpl::SendAccessibilityEventsToManager()
#7 0x7f286ff02be8 content::RenderFrameHostImpl::HandleAXEvents()
#8 0x7f286f52f046 base::internal::Invoker<>::RunOnce()
#9 0x7f2871634e51 base::internal::PostTaskAndReplyRelay::RunTaskAndPostReply()
#10 0x7f2871634663 base::internal::Invoker<>::RunOnce()
#11 0x7f2871606b74 base::TaskAnnotator::RunTaskImpl()
#12 0x7f287162f827 base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoWorkImpl()
#13 0x7f2871630932 base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoWork()
#14 0x7f286c2cf02a std::_Function_handler<>::_M_invoke()
#15 0x7f288041ed55 QObject::event()
#16 0x7f28631a628f QApplicationPrivate::notify_helper()
#17 0x7f2862db2ffe sipQApplication::notify()
#18 0x7f28803be6a8 QCoreApplication::notifyInternal2()
#19 0x7f28803c1f19 QCoreApplicationPrivate::sendPostedEvents()
#20 0x7f28806fc92f postEventSourceDispatch()
#21 0x7f2880101bab g_main_context_dispatch_unlocked
#22 0x7f2880105188 g_main_context_iterate_unlocked.isra.0
#23 0x7f2880105a2f g_main_context_iteration
#24 0x7f28806fc10d QEventDispatcherGlib::processEvents()
#25 0x7f28803cc1eb QEventLoop::exec()
#26 0x7f28803c7599 QCoreApplication::exec()
#27 0x7f2862db2067 meth_QApplication_exec
#28 0x7f2893941dc1 cfunction_call
#29 0x7f2893988402 _PyObject_MakeTpCall.localalias
#30 0x7f2893bd5f1b _PyEval_EvalFrameDefault.localalias
#31 0x7f2893be78a3 PyEval_EvalCode.localalias
#32 0x7f2893bee9cb run_eval_code_obj
#33 0x7f2893beebe7 run_mod
#34 0x7f2893bf118e _PyRun_SimpleFileObject
#35 0x7f2893bf366e Py_RunMain.localalias
#36 0x7f289342b285 __libc_start_call_main
#37 0x7f289342b338 __libc_start_main_alias_2
#38 0x56546b7d5085 _start
  r8: 0000000000000000  r9: 0000000000000000 r10: 0000000000000000 r11: 0000000000000000
 r12: 0000000000000000 r13: 00005654aa95d790 r14: 00005654aa94fdd0 r15: 00007f2873402500
  di: 0000000000000000  si: 0000000000000000  bp: 00007ffc330d2ce0  bx: 0000000000000049
  dx: 0000000000000000  ax: 0000000000000000  cx: 0000000000000000  sp: 00007ffc330d2c60
  ip: 00007f286c2ca773 efl: 0000000000010246 cgf: 002b000000000033 erf: 0000000000000004
 trp: 000000000000000e msk: 0000000000000000 cr2: 0000000000000000
[end of stack trace]
fish: Job 1, 'anki' terminated by signal SIGSEGV (Address boundary error)

Additional context

I use GNOME and am logged into a Wayland session.

echo $XDG_SESSION_TYPE
wayland

System metadata

nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 6.12.68, NixOS, 26.05 (Yarara), 26.05pre945868.a82ccc39b39b`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.31.3`
 - channels(root): `"nixos"`
 - nixpkgs: `/nix/store/an6cmfs39if1l4w2497xfcjgfhjd21jk-nixos/nixos`

Notify maintainers

@euank
@JuneStepp
@oxij

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[egorkonovalov]

Can not reproduce anymore. Closed.