Message4352

The stack trace is:

    PyStringMap.__setitem__(String, PyObject) line: 195   
    PyFrame.setlocal(String, PyObject) line: 216   
    _pyx154.f$0(PyFrame) line: 3   
    _pyx154.call_function(int, PyFrame) line: not available   
    PyTableCode.call(PyFrame, PyObject) line: 208   
    PyTableCode(PyCode).call(PyFrame) line: 14   
    Py.runCode(PyCode, PyObject, PyObject) line: 1135   
    Py.exec(PyObject, PyObject, PyObject) line: 1157   
    PythonInterpreter.exec(String) line: 137

The erroneous call with null value seems to be done from

    _pyx154.f$0(PyFrame) line: 3   

which is compiled code, so I'm not able to see it.