Detect exception in iterator next call and StopIteration

Author: philippedistributive

src/JSObjectProxy.cc

@@ -320,6 +320,13 @@ PyObject *JSObjectProxyMethodDefinitions::JSObjectProxy_iter_next(JSObjectProxy
 
   PyObject *retVal = JSFunctionProxyMethodDefinitions::JSFunctionProxy_call(nextFunction, PyTuple_New(0), NULL);
   Py_DECREF(nextFunction);
+  if (retVal == NULL) {
+    if (PyErr_Occurred()) {
+      PyErr_PrintEx(0);    
+    }
+    PyErr_SetNone(PyExc_StopIteration);
+    return NULL;
+  }
 
   // check if end of iteration
   key = PyUnicode_FromString("done");