qt 6.5.1 original

tests/auto/corelib/kernel/qobject/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_qobject Test:
+#####################################################################
+
+qt_internal_add_test(tst_qobject
+    SOURCES
+        tst_qobject.cpp
+    LIBRARIES
+        Qt::CorePrivate
+        Qt::Network
+        Qt::TestPrivate
+)
+
+## Scopes:
+#####################################################################
+add_subdirectory(signalbug)
+add_dependencies(tst_qobject signalbug_helper)

tests/auto/corelib/kernel/qobject/signalbug/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## signalbug_helper Binary:
+#####################################################################
+
+qt_internal_add_test_helper(signalbug_helper
+    SOURCES
+        signalbug.cpp signalbug.h
+)

tests/auto/corelib/kernel/qobject/signalbug/signalbug.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "signalbug.h"
+
+#include <qcoreapplication.h>
+#include <qstring.h>
+
+#include <stdio.h>
+
+static int Step = 0;
+Sender RandomSender (0, 0);
+
+void TRACE (int step, const char *name)
+{
+    for (int t = 0; t < step - 1; t++)
+        fprintf (stderr, "\t");
+    fprintf (stderr, "Step %d: %s\n", step, name);
+    return;
+}
+
+Receiver::Receiver ()
+    : QObject ()
+{
+}
+
+void Receiver::received ()
+{
+    ::Step++;
+    const int stepCopy = ::Step;
+    TRACE (stepCopy, "Receiver::received()");
+    if (::Step != 2 && ::Step != 4)
+        qFatal("%s: Incorrect Step: %d (should be 2 or 4)", Q_FUNC_INFO, ::Step);
+
+    if (::Step == 2)
+        s->fire ();
+
+    fprintf (stderr, "Receiver<%s>::received() sender=%s\n",
+        (const char *) objectName ().toLatin1 (), sender ()->metaObject()->className());
+
+    TRACE (stepCopy, "ends Receiver::received()");
+}
+
+Disconnector::Disconnector ()
+    : QObject ()
+{
+}
+
+void Disconnector::received ()
+{
+    ::Step++;
+    const int stepCopy = ::Step;
+    TRACE (stepCopy, "Disconnector::received()");
+    if (::Step != 5 && ::Step != 6)
+        qFatal("%s: Incorrect Step: %d (should be 5 or 6)", Q_FUNC_INFO, ::Step);
+
+    fprintf (stderr, "Disconnector<%s>::received() sender=%s\n",
+        (const char *) objectName ().toLatin1 (), sender ()->metaObject()->className());
+    if (sender () == 0)
+        fprintf (stderr, "WE SHOULD NOT BE RECEIVING THIS SIGNAL\n");
+
+    if (::Step == 5)
+    {
+        disconnect (s, SIGNAL(fired()), s->d, SLOT(received()));
+
+        connect (&RandomSender, SIGNAL(fired()), s->d, SLOT(received()));
+    }
+
+    TRACE (stepCopy, "ends Disconnector::received()");
+}
+
+
+Sender::Sender (Receiver *r, Disconnector *d)
+    : QObject ()
+{
+    this->r = r; this->d = d;
+    if (r)
+        connect (this, SIGNAL(fired()), r, SLOT(received()));
+    if (d)
+        connect (this, SIGNAL(fired()), d, SLOT(received()));
+};
+
+void Sender::fire ()
+{
+    ::Step++;
+    const int stepCopy = ::Step;
+    TRACE (stepCopy, "Sender::fire()");
+    if (::Step != 1 && ::Step != 3)
+        qFatal("%s: Incorrect Step: %d (should be 1 or 3)", Q_FUNC_INFO, ::Step);
+
+    emit fired ();
+    TRACE (stepCopy, "ends Sender::fire()");
+}
+
+int main (int argc, char *argv [])
+{
+    QCoreApplication app (argc, argv);
+
+    Receiver r;
+    Disconnector d;
+    Sender s (&r, &d);
+
+    r.s = &s;
+    d.s = &s;
+
+    ::Step = 0;
+    s.fire ();
+    return 0;
+}

tests/auto/corelib/kernel/qobject/signalbug/signalbug.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#ifndef SIGNAL_BUG_H
+#define SIGNAL_BUG_H
+
+
+#include <QObject>
+
+
+class Sender;
+
+
+class Receiver : public QObject
+{
+Q_OBJECT
+
+public:
+    Receiver ();
+    virtual ~Receiver () {}
+
+protected slots:
+    void received ();
+
+public:
+    Sender *s;
+};
+
+class Disconnector : public QObject
+{
+Q_OBJECT
+
+public:
+    Disconnector ();
+    virtual ~Disconnector () {}
+
+protected slots:
+    void received ();
+
+public:
+    Sender *s;
+};
+
+class Sender : public QObject
+{
+Q_OBJECT
+
+public:
+    Sender (Receiver *r, Disconnector *d);
+    virtual ~Sender () {}
+
+    void fire ();
+
+signals:
+    void fired ();
+
+public:
+    Receiver *r;
+    Disconnector *d;
+};
+
+#endif  // SIGNAL_BUG_H