From a521525c4dd98180152cb31a7a1e324929cfe928 Mon Sep 17 00:00:00 2001
From: Weng Xuetian <wengxt@gmail.com>
Date: Sun, 19 Jun 2022 19:16:51 -0700
Subject: [PATCH] Delegate updateShadow to event loop.

If PlasmaCore.Dialog resizes while visible, the kwin shadow property
used by InternalWindow may update the shadow during rendering and cause
crash related to current context.
---
 src/internalwindow.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/internalwindow.cpp b/src/internalwindow.cpp
index 50bce553eb..aad66d6266 100644
--- a/src/internalwindow.cpp
+++ b/src/internalwindow.cpp
@@ -119,7 +119,14 @@ bool InternalWindow::eventFilter(QObject *watched, QEvent *event)
             setSkipCloseAnimation(m_handle->property(s_skipClosePropertyName).toBool());
         }
         if (pe->propertyName() == s_shadowEnabledPropertyName) {
-            updateShadow();
+            // Some dialog e.g. Plasma::Dialog may update shadow in the middle of rendering.
+            // The opengl context changed by updateShadow may break the QML Window rendering
+            // and cause crash.
+            QMetaObject::invokeMethod(
+                this, [this]() {
+                    updateShadow();
+                },
+                Qt::QueuedConnection);
         }
         if (pe->propertyName() == "kwin_windowType") {
             m_windowType = m_handle->property("kwin_windowType").value<NET::WindowType>();