QAudioOutput crashes on Qt 6

This program works on Qt 5, but crashes on Qt 6 (segfault)

#include <QAudioOutput>

int main() {

    auto* foo = new QAudioOutput();

}

cmake_minimum_required(VERSION 3.23)

project(foo)

find_package(Qt6 COMPONENTS Multimedia REQUIRED)

add_executable(main main.cpp)

target_link_libraries(main Qt6::Multimedia)

I'm using Gentoo Linux, amd64

Stacktrace:

(gdb) bt full
#0 0x00007ffff7f28d64 in QMediaDevices::audioOutputs () at /mnt/portagetmp/portage/dev-qt/qtmultimedia-6.4.0/work/qtmultimedia-everywhere-src-6.4.0/src/multimedia/qmediadevices.cpp:133
No locals.
#1 0x00007ffff7f28f45 in QMediaDevices::defaultAudioOutput () at /mnt/portagetmp/portage/dev-qt/qtmultimedia-6.4.0/work/qtmultimedia-everywhere-src-6.4.0/src/multimedia/qmediadevices.cpp:190
{{ outputs = {<QListSpecialMethods<QAudioDevice>> = {<QListSpecialMethodsBase<QAudioDevice>> =

, <No data fields>}, d = {d = 0x18, ptr = 0x0, size = 93824992235925}}}}
#2 0x00007ffff7f0548a in QAudioOutput::QAudioOutput (this=0x555555581730, parent=0x0) at /mnt/portagetmp/portage/dev-qt/qtmultimedia-6.4.0/work/qtmultimedia-everywhere-src-6.4.0/src/multimedia/audio/qaudiooutput.cpp:54
No locals.
#3 0x00005555555551ba in main () at /tmp/foo/main.cpp:5
{{ foo = 0x7ffff73c1f20 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_resourceGlobalData> >::instance()::holder>}}