ATTR_LATEX :options ignored for source code

[Jeff Trull <edaskel@att.net>]

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According to the manual users can supply #+ATTR_LATEX: :options ... prior
to a source section and the options present will be supplied to the
environment (lstlistings in my case).  I find that this does not work -
regardless of settings, no options are supplied to the lstlistings
environment.  Attached is a test case that demonstrates the problem.  It is
taken from the manual.

Thanks,
Jeff

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#+TITLE: Beamer Export Test Case
#+LATEX_CLASS: beamer
#+LATEX_CLASS_OPTIONS: [aspectratio=1610]
#+OPTIONS: H:3 toc:t
#+BEAMER_THEME: PaloAlto


* First Level
** Second Level
*** Slide
#+ATTR_LATEX: :options commentstyle=\bfseries
#+begin_src C++
using foo_t = int;
struct bar_t {
    foo_t a;     // this comment should be bold
};
#+end_src