Fix crash checking base type for QObject* when checking QGraphicsObject hierarchiesHEADdev

Amends 6f996ff3439e69b3938e617135b266974802d5b1.

Fixes: PYSIDE-3158
Task-number: PYSIDE-3115
Task-number: PYSIDE-3069
Pick-to: 6.9 6.9.2
Change-Id: I66bbc9d79d850c108411f9dcbe7e3090ad15b0b3
Reviewed-by: Cristian Maureira-Fredes <[email protected]>

1 files changed, 5 insertions, 3 deletions

diff --git a/sources/pyside6/libpyside/pysidevariantutils.cpp b/sources/pyside6/libpyside/pysidevariantutils.cpp
index 729557919..558d32e00 100644
--- a/sources/pyside6/libpyside/pysidevariantutils.cpp
+++ b/sources/pyside6/libpyside/pysidevariantutils.cpp
@@ -127,9 +127,11 @@ QMetaType resolveMetaType(PyTypeObject *type)
         // QGraphicsItem::itemChange() to work.
         if (qstrcmp(typeName, "QGraphicsObject*") == 0 && size > 1) {
             auto *firstBaseType = reinterpret_cast<PyTypeObject *>(PyTuple_GetItem(type->tp_bases, 0));
-            const char *firstBaseTypeName = Shiboken::ObjectType::getOriginalName(firstBaseType);
-            if (firstBaseTypeName != nullptr && qstrcmp(firstBaseTypeName, "QObject*") == 0)
-                ++i;
+            if (SbkObjectType_Check(firstBaseType)) {
+                const char *firstBaseTypeName = Shiboken::ObjectType::getOriginalName(firstBaseType);
+                if (firstBaseTypeName != nullptr && qstrcmp(firstBaseTypeName, "QObject*") == 0)
+                    ++i;
+            }
         }
         for ( ; i < size; ++i) {
             auto baseType = reinterpret_cast<PyTypeObject *>(PyTuple_GetItem(type->tp_bases, i));