From 3c98b091280d6265cd5f1b978910f009b35b8e53 Mon Sep 17 00:00:00 2001
From: wwmayer <werner.wm.mayer@gmx.de>
Date: Fri, 17 Mar 2023 22:50:30 +0100
Subject: [PATCH] Base: fixes #8902: Segfault from Part WB functionality in
 python scripting (#8927)

---
 src/Base/VectorPy.xml    |  2 ++
 src/Base/VectorPyImp.cpp | 15 +++++++++++----
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/src/Base/VectorPy.xml b/src/Base/VectorPy.xml
index 413e0f7f39..237da76229 100644
--- a/src/Base/VectorPy.xml
+++ b/src/Base/VectorPy.xml
@@ -219,6 +219,8 @@ normal : Base.Vector</UserDocu>
     :PyObjectBase(new Vector3d(vec.x,vec.y,vec.z),T){}
     Vector3d value() const
     { return *(getVectorPtr()); }
+private:
+    Py::List sequence;
         </ClassDeclarations>
     </PythonExport>
 </GenerateModel>
diff --git a/src/Base/VectorPyImp.cpp b/src/Base/VectorPyImp.cpp
index c3f31b13cb..cf687f580c 100644
--- a/src/Base/VectorPyImp.cpp
+++ b/src/Base/VectorPyImp.cpp
@@ -185,15 +185,22 @@ PyObject * VectorPy::sequence_item (PyObject *self, Py_ssize_t index)
         PyErr_SetString(PyExc_TypeError, "first arg must be Vector");
         return nullptr;
     }
-    if (index < 0 || index > 2) {
+    if ((index < 0) || (index > 2)) {
         PyErr_SetString(PyExc_IndexError, "index out of range");
         return nullptr;
     }
 
-    unsigned short pos = index % 3;
+    VectorPy* self_ = static_cast<VectorPy*>(self);
+    if (self_->sequence.length() == 0) {
+        self_->sequence = Py::List{3};
+    }
 
-    Base::Vector3d a = static_cast<VectorPy*>(self)->value();
-    return Py_BuildValue("d", a[pos]);
+    unsigned short pos = index % 3;
+    Base::Vector3d vec = self_->value();
+    Py::Float item{vec[pos]};
+    self_->sequence.setItem(pos, item);
+
+    return Py::new_reference_to(item);
 }
 
 int VectorPy::sequence_ass_item(PyObject *self, Py_ssize_t index, PyObject *value)