Fix random crashes

Author: Cacodemon345

src/qt/qt_machinestatus.cpp

@@ -257,6 +257,7 @@ MachineStatus::MachineStatus(QObject *parent)
     , refreshTimer(new QTimer(this))
 {
     d = std::make_unique<MachineStatus::States>(this);
+    muteUnmuteAction = nullptr;
     connect(refreshTimer, &QTimer::timeout, this, &MachineStatus::refreshIcons);
     refreshTimer->start(75);
 }
@@ -502,7 +503,7 @@ MachineStatus::refresh(QStatusBar *sbar)
     sbar->removeWidget(d->sound.get());
 
     if (!muteUnmuteAction) {
-        muteUnmuteAction = new QAction(this);
+        muteUnmuteAction = new QAction;
         connect(muteUnmuteAction, &QAction::triggered, this, [this]() {
             sound_muted ^= 1;
             if (d->sound)
@@ -513,11 +514,13 @@ MachineStatus::refresh(QStatusBar *sbar)
     }
 
     if (!soundMenu) {
-        soundMenu = new QMenu(sbar);
+        soundMenu = new QMenu((QWidget*)parent());
 
         soundMenu->addAction(muteUnmuteAction);
         soundMenu->addSeparator();
         soundMenu->addAction(soundGainAction);
+
+        muteUnmuteAction->setParent(soundMenu);
     }
 
     if (cassette_enable) {
@@ -689,7 +692,8 @@ MachineStatus::refresh(QStatusBar *sbar)
 
     d->sound = std::make_unique<ClickableLabel>();
     d->sound->setPixmap(sound_muted ? d->pixmaps.soundMuted : d->pixmaps.sound);
-    muteUnmuteAction->setText(sound_muted ? tr("&Unmute") : tr("&Mute"));
+    if (muteUnmuteAction)
+        muteUnmuteAction->setText(sound_muted ? tr("&Unmute") : tr("&Mute"));
 
     connect(d->sound.get(), &ClickableLabel::clicked, this, [this](QPoint pos) {
         this->soundMenu->popup(pos - QPoint(0, this->soundMenu->sizeHint().height()));