From 82a9ecb1753a018d0b178f440b515aa3c0a2d723 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Piotr=20Wierci=C5=84ski?= <piotr.wiercinski@qt.io>
Date: Thu, 19 Oct 2023 13:04:14 +0200
Subject: [PATCH] wasm: Fix UB in QEventDispatcher

Calling std::mutex::try_lock() when the mutex is already owned by
the thread casuses undefined behavior.

Change-Id: I024ced271cad8a034bebf80b48e31e7e7461c560
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
---
 src/corelib/kernel/qeventdispatcher_wasm.cpp | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/corelib/kernel/qeventdispatcher_wasm.cpp b/src/corelib/kernel/qeventdispatcher_wasm.cpp
index fd618580f5d..930ff068712 100644
--- a/src/corelib/kernel/qeventdispatcher_wasm.cpp
+++ b/src/corelib/kernel/qeventdispatcher_wasm.cpp
@@ -271,7 +271,6 @@ bool QEventDispatcherWasm::isValidEventDispatcherPointer(QEventDispatcherWasm *e
     if (eventDispatcher == g_mainThreadEventDispatcher)
         return true;
 #if QT_CONFIG(thread)
-    Q_ASSERT(!g_staticDataMutex.try_lock()); // caller must lock mutex
     if (g_secondaryThreadEventDispatchers.contains(eventDispatcher))
         return true;
 #endif