From f0bc5cac4f08de7fdfe21fb737b4bd0975ee5727 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tor=20Arne=20Vestb=C3=B8?= <tor.arne.vestbo@qt.io>
Date: Mon, 5 Feb 2024 15:17:52 +0100
Subject: [PATCH] iOS: Guard against displayLayer after platform window is gone

During shutdown the UIView might outlive its QIOSWindow platform
window. If we receive displayLayer calls, we need to bail out,
to avoid crashing when trying to send the expose event.

Pick-to: 6.6 6.5
Change-Id: I2f36a4dd825e91b348bc57a06e6aa6b1a12fd249
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
(cherry picked from commit 483523ad9f9807e84ab6aa0f48712df0524dbe28)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/plugins/platforms/ios/quiview.mm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/plugins/platforms/ios/quiview.mm b/src/plugins/platforms/ios/quiview.mm
index 618184796e3..cc206497858 100644
--- a/src/plugins/platforms/ios/quiview.mm
+++ b/src/plugins/platforms/ios/quiview.mm
@@ -263,6 +263,9 @@ inline ulong getTimeStamp(UIEvent *event)
     Q_UNUSED(layer);
     Q_ASSERT(layer == self.layer);
 
+    if (!self.platformWindow)
+        return;
+
     [self sendUpdatedExposeEvent];
 }