reStructuredText in pycharm

For some reason, the lineno attribute used for numbering lines in code embedded in restructuredtext is not working in Pycharm 2018.2 release candidate:

.. code-block:: bash
    :linenos:

    echo Hello

Pygments 2.2.0 is properly installed and the Python version is 3.7.

The error is:

System Message: ERROR/3 (<stdin>, line 121)

Error in "code-block" directive: unknown option: "linenos".

.. code-block:: bash
:linenos:

echo Hello