shiboken6: Prevent span instantiation

std::span cannot be instantiated since it is a non-owning container.

Task-number: PYSIDE-2174
Change-Id: Iaf3ca97c29f28edba9a6ab469e953da16a477c4a
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>

2 files changed, 10 insertions, 1 deletions

diff --git a/sources/shiboken6/generator/shiboken/cppgenerator_container.cpp b/sources/shiboken6/generator/shiboken/cppgenerator_container.cpp
index a080a83f5..9632fd940 100644
--- a/sources/shiboken6/generator/shiboken/cppgenerator_container.cpp
+++ b/sources/shiboken6/generator/shiboken/cppgenerator_container.cpp
@@ -196,7 +196,8 @@ CppGenerator::OpaqueContainerData
     const QString slotsList = result.name + u"_slots"_s;
     s << "static PyType_Slot " << slotsList << "[] = {\n" << indent;
     writeSlot(s, privateObjType, "Py_tp_init", "tpInit");
-    writeSlot(s, privateObjType, "Py_tp_new", "tpNew");
+    const auto *tpNew = containerTypeEntry->viewOn() == nullptr ? "tpNew" : "tpNewInvalid";
+    writeSlot(s, privateObjType, "Py_tp_new", tpNew);
     writeSlot(s, privateObjType, "Py_tp_free", "tpFree");
     writeSlot(s, "Py_tp_dealloc", "Sbk_object_dealloc"); // FIXME?
     writeSlot(s, "Py_tp_methods", methods.toUtf8().constData());
diff --git a/sources/shiboken6/libshiboken/sbkcontainer.h b/sources/shiboken6/libshiboken/sbkcontainer.h
index 6767e11f2..96faf95ee 100644
--- a/sources/shiboken6/libshiboken/sbkcontainer.h
+++ b/sources/shiboken6/libshiboken/sbkcontainer.h
@@ -71,6 +71,14 @@ public:
         return reinterpret_cast<PyObject *>(me);
     }
 
+    static PyObject *tpNewInvalid(PyTypeObject * /* subtype */, PyObject * /* args */, PyObject * /* kwds */)
+    {
+        PyErr_Format(PyExc_NotImplementedError,
+                     "Opaque containers of type '%s' cannot be instantiated.",
+                     typeid(SequenceContainer).name());
+        return nullptr;
+    }
+
     static int tpInit(PyObject * /* self */, PyObject * /* args */, PyObject * /* kwds */)
     {
         return 0;