Fix wrong Python init return codes

PySide classes had wrong return values in their init code.
In case of errors, they would not show up immediately.

The following modules are affected:
    sources/pyside2/libpyside/pysideclassinfo.cpp
    sources/pyside2/libpyside/pysideproperty.cpp
    sources/pyside2/libpyside/pysidesignal.cpp
    sources/pyside2/libpyside/pysideslot.cpp
    sources/pyside2/PySide2/QtQml/pysideqmlregistertype.cpp

This error exists since Nov 03 2010 .

Fixes: PYSIDE-1077
Change-Id: I8cf9bf7d1d8f8dca1155274cb24408f423557bac
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>

5 files changed, 9 insertions, 9 deletions

diff --git a/sources/pyside2/PySide2/QtQml/pysideqmlregistertype.cpp b/sources/pyside2/PySide2/QtQml/pysideqmlregistertype.cpp
index 2386620ca..db297db7c 100644
--- a/sources/pyside2/PySide2/QtQml/pysideqmlregistertype.cpp
+++ b/sources/pyside2/PySide2/QtQml/pysideqmlregistertype.cpp
@@ -215,13 +215,13 @@ static int propListTpInit(PyObject *self, PyObject *args, PyObject *kwds)
                                      &data->at,
                                      &data->clear,
                                      &data->count)) {
-        return 0;
+        return -1;
     }
     PySide::Property::setMetaCallHandler(pySelf, &propListMetaCall);
     PySide::Property::setTypeName(pySelf, "QQmlListProperty<QObject>");
     PySide::Property::setUserData(pySelf, data);
 
-    return 1;
+    return 0;
 }
 
 void propListTpFree(void *self)
diff --git a/sources/pyside2/libpyside/pysideclassinfo.cpp b/sources/pyside2/libpyside/pysideclassinfo.cpp
index bf2a1307f..288e7f97c 100644
--- a/sources/pyside2/libpyside/pysideclassinfo.cpp
+++ b/sources/pyside2/libpyside/pysideclassinfo.cpp
@@ -161,7 +161,7 @@ int classInfoTpInit(PyObject *self, PyObject *args, PyObject *kwds)
         }
     }
 
-    return PyErr_Occurred() ? -1 : 1;
+    return PyErr_Occurred() ? -1 : 0;
 }
 
 void classInfoFree(void *self)
diff --git a/sources/pyside2/libpyside/pysideproperty.cpp b/sources/pyside2/libpyside/pysideproperty.cpp
index a2bf5fd2b..a9cacf869 100644
--- a/sources/pyside2/libpyside/pysideproperty.cpp
+++ b/sources/pyside2/libpyside/pysideproperty.cpp
@@ -175,7 +175,7 @@ int qpropertyTpInit(PyObject *self, PyObject *args, PyObject *kwds)
                                      /*s*/      &doc,
                                      /*O*/      &(pData->notify),
                                      /*bbbbbb*/ &(pData->designable), &(pData->scriptable), &(pData->stored), &(pData->user), &(pData->constant), &(pData->final))) {
-        return 0;
+        return -1;
     }
 
     if (doc) {
@@ -198,7 +198,7 @@ int qpropertyTpInit(PyObject *self, PyObject *args, PyObject *kwds)
         Py_XINCREF(pData->freset);
         Py_XINCREF(pData->fdel);
         Py_XINCREF(pData->notify);
-        return 1;
+        return 0;
     }
     pData->fget = nullptr;
     pData->fset = nullptr;
diff --git a/sources/pyside2/libpyside/pysidesignal.cpp b/sources/pyside2/libpyside/pysidesignal.cpp
index 47a5fff43..434ef6ac3 100644
--- a/sources/pyside2/libpyside/pysidesignal.cpp
+++ b/sources/pyside2/libpyside/pysidesignal.cpp
@@ -212,7 +212,7 @@ int signalTpInit(PyObject *self, PyObject *args, PyObject *kwds)
 
     if (!PyArg_ParseTupleAndKeywords(emptyTuple, kwds,
         "|sO:QtCore." SIGNAL_CLASS_NAME, const_cast<char **>(kwlist), &argName, &argArguments))
-        return 0;
+        return -1;
 
     bool tupledArgs = false;
     PySideSignal *data = reinterpret_cast<PySideSignal *>(self);
@@ -257,7 +257,7 @@ int signalTpInit(PyObject *self, PyObject *args, PyObject *kwds)
                     PySide::Signal::SignalSignature(sig));
     }
 
-    return 1;
+    return 0;
 }
 
 void signalFree(void *self)
diff --git a/sources/pyside2/libpyside/pysideslot.cpp b/sources/pyside2/libpyside/pysideslot.cpp
index 2cdf32626..2f8e69e8f 100644
--- a/sources/pyside2/libpyside/pysideslot.cpp
+++ b/sources/pyside2/libpyside/pysideslot.cpp
@@ -104,7 +104,7 @@ int slotTpInit(PyObject *self, PyObject *args, PyObject *kw)
 
     if (!PyArg_ParseTupleAndKeywords(emptyTuple, kw, "|sO:QtCore." SLOT_DEC_NAME,
                                      const_cast<char **>(kwlist), &argName, &argResult)) {
-        return 0;
+        return -1;
     }
 
     PySideSlot *data = reinterpret_cast<PySideSlot *>(self);
@@ -128,7 +128,7 @@ int slotTpInit(PyObject *self, PyObject *args, PyObject *kw)
     data->slotData->resultType = argResult
         ? PySide::Signal::getTypeName(argResult) : PySide::Signal::voidType();
 
-    return 1;
+    return 0;
 }
 
 PyObject *slotCall(PyObject *self, PyObject *args, PyObject * /* kw */)