From 3aac13eacf33e3669b84d4afe53b25804f431fbc Mon Sep 17 00:00:00 2001
From: Uwe <donovaly@users.noreply.github.com>
Date: Wed, 9 Nov 2022 13:23:47 +0100
Subject: [PATCH] Revert "Gui: fix possible crash when running the garbage
 collector after creating a shiboken wrapper"

This reverts commit a06533392b272694c08fc951f7e04b2ff8526e8c.
---
 src/Gui/PythonWrapper.cpp | 100 --------------------------------------
 1 file changed, 100 deletions(-)

diff --git a/src/Gui/PythonWrapper.cpp b/src/Gui/PythonWrapper.cpp
index 0e94a76b6a..199f23ace4 100644
--- a/src/Gui/PythonWrapper.cpp
+++ b/src/Gui/PythonWrapper.cpp
@@ -217,106 +217,6 @@ void registerTypes()
 // --------------------------------------------------------
 
 namespace Gui {
-template<typename qttype>
-PyTypeObject *getPyTypeObjectForTypeName();
-
-/*!
- * \brief The WrapperManager class
- * This is a helper class that records the Python wrappers of a QObject and invalidates
- * them when the QObject is about to be destroyed.
- * This is to make sure that if the Python wrapper doesn't own the QObject it won't be notified
- * if the QObject is destroyed.
- * \code
- * ui = Gui.UiLoader()
- * lineedit = ui.createWidget("QLineEdit")
- * lineedit.deleteLater()
- * # Make sure this won't crash
- * lineedit.show()
- * \endcode
- */
-class WrapperManager : public QObject
-{
-    std::unordered_map<QObject*, std::list<Py::Object>> wrappers;
-
-public:
-    static WrapperManager& instance()
-    {
-        static WrapperManager singleton;
-        return singleton;
-    }
-    /*!
-     * \brief addQObject
-     * \param obj
-     * \param pyobj
-     * Add the QObject and its Python wrapper to the list.
-     */
-    void addQObject(QObject* obj, PyObject* pyobj)
-    {
-        if (wrappers.find(obj) == wrappers.end()) {
-            QObject::connect(obj, &QObject::destroyed, this, &WrapperManager::destroyed);
-        }
-
-        auto& pylist = wrappers[obj];
-        if (std::find_if(pylist.cbegin(), pylist.cend(), [pyobj](const Py::Object& py) { return py.ptr() == pyobj; }) == pylist.end()) {
-            pylist.emplace_back(pyobj);
-        }
-    }
-
-private:
-    /*!
-     * \brief destroyed
-     * \param obj
-     * The listed QObject is about to be destroyed. Invalidate its Python wrappers now.
-     */
-    void destroyed(QObject* obj = nullptr)
-    {
-        if (obj) {
-#if defined (HAVE_SHIBOKEN) && defined(HAVE_PYSIDE)
-            auto key = wrappers.find(obj);
-            if (key != wrappers.end()) {
-                Base::PyGILStateLocker lock;
-                for (const auto& it : key->second) {
-                    auto value = it.ptr();
-                    Shiboken::Object::setValidCpp(reinterpret_cast<SbkObject*>(value), false);
-                }
-
-                wrappers.erase(key);
-            }
-#endif
-        }
-    }
-    void clear()
-    {
-        Base::PyGILStateLocker lock;
-        wrappers.clear();
-    }
-    void wrapQApplication()
-    {
-        // We have to explicitly hold a reference to the wrapper of the QApplication
-        // as otherwise it can happen that when running the gc the program crashes
-        // The code snippet below caused a crash on older versions:
-        // mw = Gui.getMainWindow()
-        // mw.style()
-        // import gc
-        // gc.collect()
-        PyTypeObject * type = getPyTypeObjectForTypeName<QApplication>();
-        if (type) {
-            auto sbk_type = reinterpret_cast<SbkObjectType*>(type);
-            std::string typeName = "QApplication";
-            PyObject* pyobj = Shiboken::Object::newObject(sbk_type, qApp, false, false, typeName.c_str());
-            addQObject(qApp, pyobj);
-        }
-    }
-
-    WrapperManager()
-    {
-        connect(QApplication::instance(), &QCoreApplication::aboutToQuit,
-                this, &WrapperManager::clear);
-        wrapQApplication();
-    }
-    ~WrapperManager() = default;
-};
-
 template<typename qttype>
 Py::Object qt_wrapInstance(qttype object, const char* className,
                            const char* shiboken, const char* pyside,