PySide6: Prevent crash when connecting to temporary signal sources

Add a check to the connect function.

Pick-to: 6.5
Fixes: PYSIDE-2328
Change-Id: I62a10ef5710487f8ab23cc46c1cc4a34fab5e2b1
Reviewed-by: Shyamnath Premnadh <Shyamnath.Premnadh@qt.io>

1 files changed, 5 insertions, 0 deletions

diff --git a/sources/pyside6/libpyside/pysidesignal.cpp b/sources/pyside6/libpyside/pysidesignal.cpp
index 17071cd1d..ad2a42802 100644
--- a/sources/pyside6/libpyside/pysidesignal.cpp
+++ b/sources/pyside6/libpyside/pysidesignal.cpp
@@ -441,6 +441,11 @@ static PyObject *signalInstanceConnect(PyObject *self, PyObject *args, PyObject
         PyErr_Format(PyExc_RuntimeError, "cannot connect uninitialized SignalInstance");
         return nullptr;
     }
+    if (source->deleted) {
+        PyErr_Format(PyExc_RuntimeError, "Signal source has been deleted");
+        return nullptr;
+    }
+
     Shiboken::AutoDecRef pyArgs(PyList_New(0));
 
     bool match = false;