crash when screen close

[iamveryverystupid]

Describe the bug
when output closes, with wlr-randr --output eDP-1 --off or suspending on my laptop, it segfaults

To reproduce

Environment

• Waybar v0.15.0-934-gcf19c836 (branch 'HEAD')
• gentoo llvm profile, with libcxx
• mango

Debug output

[2026-07-14 11:57:35.487] [debug] Output eDP-1 mapped (DPMS on), resuming modules
[2026-07-14 11:57:35.488] [debug] GTK widget tree:
window#waybar.background.left.eDP-1.topbar.mode-default:dir(ltr)
  decoration:dir(ltr)
  box.vertical:dir(ltr)
    box.vertical.modules-left:dir(ltr)
      widget:dir(ltr)
        box#gentoo.vertical:dir(ltr)
          widget:dir(ltr)
            box#custom-gentoo.horizontal.module:dir(ltr)
              image:dir(ltr)
              label:dir(ltr)
          revealer.drawer:dir(ltr)
            box.vertical:dir(ltr)
              widget.drawer-child:dir(ltr)
                box#custom-fuzzel.horizontal.module:dir(ltr)
                  image:dir(ltr)
                  label:dir(ltr)
              widget.drawer-child:dir(ltr)
                box#custom-foot.horizontal.module:dir(ltr)
                  image:dir(ltr)
                  label:dir(ltr)
              widget.drawer-child:dir(ltr)
                box#custom-qalculate.horizontal.module:dir(ltr)
                  image:dir(ltr)
                  label:dir(ltr)
              widget.drawer-child:dir(ltr)
                box#custom-thunar.horizontal.module:dir(ltr)
                  image:dir(ltr)
                  label:dir(ltr)
      widget:dir(ltr)
        box#custom-spacer.vertical.module:dir(ltr)
          label:dir(ltr)
          image:dir(ltr)
      widget:dir(ltr)
        box#window.vertical:dir(ltr)
          widget:dir(ltr)
            box#workspaces.vertical.module:dir(ltr)
              button.flat.text-button:dir(ltr)
                label:dir(ltr)
          revealer.drawer:dir(ltr)
            box.vertical:dir(ltr)
              widget.drawer-child:dir(ltr)
                box#custom-spacer.vertical.module:dir(ltr)
                  label:dir(ltr)
                  image:dir(ltr)
              widget.drawer-child:dir(ltr)
                box#window.vertical.module:dir(ltr)
                  label:dir(ltr)
                  image:dir(ltr)
    box.vertical.modules-center:dir(ltr)
      widget:dir(ltr)
        label#clock.module:dir(ltr)
      widget:dir(ltr)
        label#clock.clock2.module:dir(ltr)
    box.vertical.modules-right:dir(ltr)
      widget:dir(ltr)
        label#wireplumber.module:dir(ltr)
      widget:dir(ltr)
        label#battery.module:dir(ltr)
      widget:dir(ltr)
        label#network.module:dir(ltr)
      widget:dir(ltr)
        box#tray.vertical.module:dir(ltr)
      widget:dir(ltr)
        box#menu.vertical:dir(ltr)
          revealer.drawer:dir(ltr)
            box.vertical:dir(ltr)
              widget.drawer-child:dir(ltr)
                label#keymode.module:dir(ltr)
              widget.drawer-child:dir(ltr)
                label#layout.module:dir(ltr)
              widget.drawer-child:dir(ltr)
                label#idle_inhibitor.module:dir(ltr)
              widget.drawer-child:dir(ltr)
                box#custom-power.horizontal.module:dir(ltr)
                  image:dir(ltr)
                  label:dir(ltr)
          widget:dir(ltr)
            box#custom-menu.horizontal.module:dir(ltr)
              image:dir(ltr)
              label:dir(ltr)

[2026-07-14 11:57:35.553] [info] Host: Found 0 pre-registered SNI items
[2026-07-14 11:57:35.568] [info] Bar configured (width: 56, height: 1200) for output: eDP-1
[2026-07-14 11:57:35.575] [debug] [wireplumber]: callback loading default node api module
[2026-07-14 11:57:35.575] [debug] [wireplumber]: loaded default nodes api
[2026-07-14 11:57:35.575] [debug] [wireplumber]: loading mixer api module
[2026-07-14 11:57:35.585] [debug] [wireplumber]: loaded mixer API
[2026-07-14 11:57:35.585] [debug] [wireplumber]: activating plugins
[2026-07-14 11:57:35.585] [debug] [wireplumber]: onPluginActivated: mixer-api
[2026-07-14 11:57:35.585] [debug] [wireplumber]: onPluginActivated: default-nodes-api
[2026-07-14 11:57:35.586] [debug] [wireplumber]: onObjectManagerInstalled
[2026-07-14 11:57:35.586] [debug] [wireplumber]: updating volume
[2026-07-14 11:57:35.586] [debug] [wireplumber]: updating 'Audio/Sink' node name with node.id 71
[2026-07-14 11:57:35.586] [debug] [wireplumber]: Updating 'Audio/Sink' node name to: MacBook Air 9,1 Speakers
[2026-07-14 11:57:35.586] [debug] [wireplumber]: updating source volume
[2026-07-14 11:57:35.586] [debug] [wireplumber]: updating source name with node.id 84
[2026-07-14 11:57:35.586] [debug] [wireplumber]: Updating source name to: MacBook Pro T2 DSP Mic
[2026-07-14 11:57:40.295] [debug] Output removed: Unknown Unknown
[2026-07-14 11:57:40.295] [info] Bar configured (width: 56, height: 1200) for output: eDP-1
[2026-07-14 11:57:40.300] [debug] Output eDP-1 unmapped (DPMS off), suspending modules
[1]    21178 segmentation fault  GTK_THEME=rose-pine-gtk:light waybar -l debug

Additional context
useflags: (experimental logind mango network niri pipewire tray udev upower -backlight -evdev -gps -jack -libinput -mpd -mpris -pulseaudio -screencast -sndio -systemd -test -wifi)
compile flags: -ffast-math -O3 -march=native -pipe -flto=thin -fwhole-program-vtables -fno-semantic-interposition -fstack-protector-strong -ftrivial-auto-var-init=zero -fstack-clash-protection -mllvm=-polly -mllvm=-polly-vectorizer=stripmine -mllvm=-polly-omp-backend=LLVM -mllvm=-polly-parallel -mllvm=-polly-num-threads=8 -mllvm=-polly-scheduling=dynamic

diff /var/db/repos/local/gui-apps/waybar/waybar-9999.ebuild /var/db/repos/gentoo/gui-apps/waybar/

waybar-9999.ebuild 
22c22
< IUSE="backlight evdev experimental gps jack +libinput +logind mpd mpris network niri pipewire pulseaudio screencast sndio systemd test tray +udev upower wifi mango"
---
> IUSE="backlight evdev experimental gps jack +libinput +logind mpd mpris network niri pipewire pulseaudio screencast sndio systemd test tray +udev upower wifi"
56c56
< logind? (
---
> 	logind? (
83d82
< 		-Dlibcxx=true
106d104
< 		$(meson_use mango)

[DreamMaoMao]

I can't reproduce this issue. Could you provide the following tracking of the coredump(with debug symbol) after the waybar crash?

[iamveryverystupid]

[New Thread 0x7ffff43ff6c0 (LWP 188823)]
[New Thread 0x7ffff37ff6c0 (LWP 188824)]
[New Thread 0x7ffff2ffe6c0 (LWP 188825)]
[New Thread 0x7ffff27fd6c0 (LWP 188826)]
[New Thread 0x7ffff1ffc6c0 (LWP 188827)]
[New Thread 0x7ffff17fb6c0 (LWP 188828)]
[New Thread 0x7ffff0ffa6c0 (LWP 188829)]
[2026-07-16 21:07:38.256] [info] Using configuration file /home/thing/.config/waybar/config
[2026-07-16 21:07:38.267] [info] Discovered appearance 'dark'
[2026-07-16 21:07:38.409] [info] Using CSS file /home/thing/.config/waybar/style.css
[New Thread 0x7fffdb9ff6c0 (LWP 188831)]
[2026-07-16 21:07:38.448] [info] Mango IPC thread started
[New Thread 0x7fffdb1fe6c0 (LWP 188832)]
[New Thread 0x7fffda9fd6c0 (LWP 188833)]
[New Thread 0x7fffda1fc6c0 (LWP 188834)]
[New Thread 0x7fffd99fb6c0 (LWP 188835)]
[New Thread 0x7fffd91fa6c0 (LWP 188836)]
[New Thread 0x7fffd89f96c0 (LWP 188837)]
[2026-07-16 21:07:38.562] [warning] Waybar has been built without rfkill support.
[New Thread 0x7fffcffff6c0 (LWP 188838)]
[2026-07-16 21:07:38.563] [info] Tray: No ignore-list configured
[2026-07-16 21:07:38.670] [info] Host: Found 0 pre-registered SNI items
[2026-07-16 21:07:38.687] [info] Bar configured (width: 56, height: 1200) for output: eDP-1
[2026-07-16 21:07:44.776] [info] Bar configured (width: 56, height: 1200) for output: eDP-1
[Thread 0x7fffda1fc6c0 (LWP 188834) exited]
[Thread 0x7fffd99fb6c0 (LWP 188835) exited]

Thread 14 "waybar" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffd91fa6c0 (LWP 188836)]
0x0000000000000009 in ?? ()
(gdb) bt
#0  0x0000000000000009 in ??? ()
#1  0x00007ffff6445ace in unw_get_proc_info () at /usr/lib64/libunwind.so.1
#2  0x00007ffff6449c00 in _Unwind_GetLanguageSpecificData () at /usr/lib64/libunwind.so.1
#3  0x00007ffff7f92d00 in __gxx_personality_v0 () at /usr/lib64/libc++abi.so.1
#4  0x00007ffff6255bd1 in ??? () at /usr/lib/gcc/x86_64-pc-linux-gnu/16/libgcc_s.so.1
#5  0x00007ffff6256239 in _Unwind_ForcedUnwind () at /usr/lib/gcc/x86_64-pc-linux-gnu/16/libgcc_s.so.1
#6  0x00007ffff6315b06 in ??? () at /usr/lib64/libc.so.6
#7  0x00007ffff6309320 in ??? () at /usr/lib64/libc.so.6
#8  0x00007ffff6309399 in ??? () at /usr/lib64/libc.so.6
#9  0x00007ffff63093c1 in ??? () at /usr/lib64/libc.so.6
#10 0x00007ffff63723ea in poll () at /usr/lib64/libc.so.6
#11 0x000055555580d384 in waybar::modules::Battery::worker()::$_2::operator()() const (this=0x555555d76b38) at ../waybar-9999/src/modules/battery.cpp:93
#12 0x000055555580d295 in std::__1::__invoke[abi:sqe220108]<waybar::modules::Battery::worker()::$_2&>(waybar::modules::Battery::worker()::$_2&) (__args=...) at /usr/include/c++/v1/__type_traits/invoke.h:90
#13 0x000055555580d275 in std::__1::__invoke_void_return_wrapper<void, true>::__call[abi:sqe220108]<waybar::modules::Battery::worker()::$_2&>(waybar::modules::Battery::worker()::$_2&) (__args=...)
    at /usr/include/c++/v1/__type_traits/invoke.h:350
#14 0x000055555580d255 in std::__1::__invoke_r[abi:sqe220108]<void, waybar::modules::Battery::worker()::$_2&>(waybar::modules::Battery::worker()::$_2&) (__args=...) at /usr/include/c++/v1/__type_traits/invoke.h:356
#15 0x000055555580d16d in std::__1::__function::__func<waybar::modules::Battery::worker()::$_2, void()>::operator() (this=0x555555d76b30) at /usr/include/c++/v1/__functional/function.h:172
#16 0x000055555573e512 in std::__1::__function::__value_func<void ()>::operator()[abi:sqe220108]() const (this=0x555555d76b30) at /usr/include/c++/v1/__functional/function.h:273
#17 0x000055555573e479 in std::__1::function<void()>::operator() (this=0x555555d76b30) at /usr/include/c++/v1/__functional/function.h:754
#18 0x000055555573e422 in waybar::util::SleeperThread::operator=(std::__1::function<void ()>)::{lambda()#1}::operator()() const (this=0x555555d76b20) at ../waybar-9999/include/util/sleeper_thread.hpp:58
#19 0x000055555573e399 in std::__1::__invoke[abi:sqe220108]<waybar::util::SleeperThread::operator=(std::__1::function<void ()>)::{lambda()#1}>(waybar::util::SleeperThread::operator=(std::__1::function<void ()>)::{lambda()#1}&&)
    (__args=...) at /usr/include/c++/v1/__type_traits/invoke.h:90
#20 0x000055555573e321 in std::__1::__thread_execute[abi:sqe220108]<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, waybar::util::SleeperThread::operator=(std::__1::function<void ()>)::{lambda()#1}, , 0ul>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, waybar::util::SleeperThread::operator=(std::__1::function<void ()>)::{lambda()#1}>&, std::__1::__integer_sequence<unsigned long, 0ul>) (__t=...) at /usr/include/c++/v1/__thread/thread.h:161
#21 0x000055555573df3d in std::__1::__thread_proxy[abi:sqe220108]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, waybar::util::SleeperThread::operator=(std::__1::function<void ()>)::{lambda()#1}> >(void*) (__vp=0x555555d76b10) at /usr/include/c++/v1/__thread/thread.h:169
#22 0x00007ffff630ca20 in ??? () at /usr/lib64/libc.so.6
#23 0x00007ffff637defc in ??? () at /usr/lib64/libc.so.6
(gdb) 

idk how to use gdb
how to get coredump?

[DreamMaoMao]

It seems to be a problem with the chaotic multi-threaded state of the power module