diff --git a/autotests/integration/kwin_wayland_test.cpp b/autotests/integration/kwin_wayland_test.cpp
--- a/autotests/integration/kwin_wayland_test.cpp
+++ b/autotests/integration/kwin_wayland_test.cpp
@@ -83,18 +83,23 @@
     if (effects) {
         static_cast<EffectsHandlerImpl*>(effects)->unloadAllEffects();
     }
-    if (m_xwayland) {
-        // needs to be done before workspace gets destroyed
-        m_xwayland->prepareDestroy();
-    }
-    destroyWorkspace();
+
+    // Kill Xwayland before terminating its connection.
+    delete m_xwayland;
+    m_xwayland = nullptr;
+
+    // Terminate all client connections before Workspace is destroyed.
+    // Shell clients need to access RuleBook whose lifetime is bound
+    // to the Workspace class.
+    waylandServer()->terminateClientConnections();
     waylandServer()->dispatch();
+
+    destroyWorkspace();
+
     if (QStyle *s = style()) {
         s->unpolish(this);
     }
-    // kill Xwayland before terminating its connection
-    delete m_xwayland;
-    waylandServer()->terminateClientConnections();
+
     destroyCompositor();
 }
 
diff --git a/main_wayland.cpp b/main_wayland.cpp
--- a/main_wayland.cpp
+++ b/main_wayland.cpp
@@ -128,20 +128,23 @@
     if (effects) {
         static_cast<EffectsHandlerImpl*>(effects)->unloadAllEffects();
     }
-    if (m_xwayland) {
-        // needs to be done before workspace gets destroyed
-        m_xwayland->prepareDestroy();
-    }
-    destroyWorkspace();
+
+    // Kill Xwayland before terminating its connection.
+    delete m_xwayland;
+    m_xwayland = nullptr;
+
+    // Terminate all client connections before Workspace is destroyed.
+    // Shell clients need to access RuleBook whose lifetime is bound
+    // to the Workspace class.
+    waylandServer()->terminateClientConnections();
     waylandServer()->dispatch();
 
+    destroyWorkspace();
+
     if (QStyle *s = style()) {
         s->unpolish(this);
     }
-    // kill Xwayland before terminating its connection
-    delete m_xwayland;
-    m_xwayland = nullptr;
-    waylandServer()->terminateClientConnections();
+
     destroyCompositor();
 }
 
diff --git a/shell_client.cpp b/shell_client.cpp
--- a/shell_client.cpp
+++ b/shell_client.cpp
@@ -425,37 +425,32 @@
     if (isMoveResize()) {
         leaveMoveResize();
     }
-    Deleted *del = nullptr;
-    if (workspace()) {
-        del = Deleted::create(this);
-    }
-    emit windowClosed(this, del);
+
+    Deleted *deleted = Deleted::create(this);
+    emit windowClosed(this, deleted);
 
     // Remove Force Temporarily rules.
     RuleBook::self()->discardUsed(this, true);
 
     destroyWindowManagementInterface();
     destroyDecoration();
 
-    if (workspace()) {
-        StackingUpdatesBlocker blocker(workspace());
-        if (transientFor()) {
-            transientFor()->removeTransient(this);
-        }
-        for (auto it = transients().constBegin(); it != transients().constEnd();) {
-            if ((*it)->transientFor() == this) {
-                removeTransient(*it);
-                it = transients().constBegin(); // restart, just in case something more has changed with the list
-            } else {
-                ++it;
-            }
+    StackingUpdatesBlocker blocker(workspace());
+    if (transientFor()) {
+        transientFor()->removeTransient(this);
+    }
+    for (auto it = transients().constBegin(); it != transients().constEnd();) {
+        if ((*it)->transientFor() == this) {
+            removeTransient(*it);
+            it = transients().constBegin(); // restart, just in case something more has changed with the list
+        } else {
+            ++it;
         }
     }
+
     waylandServer()->removeClient(this);
 
-    if (del) {
-        del->unrefWindow();
-    }
+    deleted->unrefWindow();
     m_shellSurface = nullptr;
     m_xdgShellSurface = nullptr;
     m_xdgShellPopup = nullptr;
diff --git a/xwl/xwayland.h b/xwl/xwayland.h
--- a/xwl/xwayland.h
+++ b/xwl/xwayland.h
@@ -47,7 +47,6 @@
     ~Xwayland() override;
 
     void init();
-    void prepareDestroy();
 
     xcb_screen_t *xcbScreen() const {
         return m_xcbScreen;
diff --git a/xwl/xwayland.cpp b/xwl/xwayland.cpp
--- a/xwl/xwayland.cpp
+++ b/xwl/xwayland.cpp
@@ -88,6 +88,9 @@
 
 Xwayland::~Xwayland()
 {
+    delete m_dataBridge;
+    m_dataBridge = nullptr;
+
     disconnect(m_xwaylandFailConnection);
     if (m_app->x11Connection()) {
         Xcb::setInputFocus(XCB_INPUT_FOCUS_POINTER_ROOT);
@@ -178,12 +181,6 @@
     close(pipeFds[1]);
 }
 
-void Xwayland::prepareDestroy()
-{
-    delete m_dataBridge;
-    m_dataBridge = nullptr;
-}
-
 void Xwayland::createX11Connection()
 {
     int screenNumber = 0;