diff --git a/3rdparty/pythonqt/patches/cleanup-signal-receivers.patch b/3rdparty/pythonqt/patches/cleanup-signal-receivers.patch
new file mode 100644
index 000000000..0f50f3086
--- /dev/null
+++ b/3rdparty/pythonqt/patches/cleanup-signal-receivers.patch
@@ -0,0 +1,20 @@
+diff --git a/3rdparty/pythonqt/src/PythonQt.cpp b/3rdparty/pythonqt/src/PythonQt.cpp
+index f97bdf1..dfde7a0 100644
+--- a/3rdparty/pythonqt/src/PythonQt.cpp
++++ b/3rdparty/pythonqt/src/PythonQt.cpp
+@@ -200,12 +200,9 @@ PythonQtPrivate::~PythonQtPrivate() {
+   delete _defaultImporter;
+   _defaultImporter = NULL;
+ 
+-  {
+-    QHashIterator<QByteArray, PythonQtClassInfo *> i(_knownClassInfos);
+-    while (i.hasNext()) {
+-      delete i.next().value();
+-    }
+-  }
++  qDeleteAll(_knownClassInfos.values());
++  qDeleteAll(_signalReceivers.values());
++
+   PythonQtConv::global_valueStorage.clear();
+   PythonQtConv::global_ptrStorage.clear();
+   PythonQtConv::global_variantStorage.clear();
diff --git a/3rdparty/pythonqt/src/PythonQt.cpp b/3rdparty/pythonqt/src/PythonQt.cpp
index f97bdf1b1..dfde7a028 100644
--- a/3rdparty/pythonqt/src/PythonQt.cpp
+++ b/3rdparty/pythonqt/src/PythonQt.cpp
@@ -200,12 +200,9 @@ PythonQtPrivate::~PythonQtPrivate() {
   delete _defaultImporter;
   _defaultImporter = NULL;
 
-  {
-    QHashIterator<QByteArray, PythonQtClassInfo *> i(_knownClassInfos);
-    while (i.hasNext()) {
-      delete i.next().value();
-    }
-  }
+  qDeleteAll(_knownClassInfos.values());
+  qDeleteAll(_signalReceivers.values());
+
   PythonQtConv::global_valueStorage.clear();
   PythonQtConv::global_ptrStorage.clear();
   PythonQtConv::global_variantStorage.clear();