Hi Jack,

I have cloned the git master. Running without configuration ("make
vanilla"), emacs correctly fontifies the source block and it also gets
exported to HTML. It seems that it is a configuration problem. Sorry for
not double checking first!

Many thanks for your help!

Cheers,
Sebastian


On Mon, Nov 2, 2020 at 12:43 AM Sebastian Gimeno <changimeno@gmail.com>
wrote:

> Hi Jack,
>
> thanks for replying!
>
> The error does not happen using "emacs -q" (built-in package: org 9.3). I
> haven't tried with the git version yet. i will and let you know.
>
> Cheers,
> Sebastian
>
> On Sun, Nov 1, 2020 at 9:19 PM Jack Kamm <jackkamm@gmail.com> wrote:
>
>> Hi Sebastian --
>>
>> > I am having problems with the fontification of python and ipython source
>> > blocks when the code contains curly brackets "{}" (other course blocks
>> are
>> > ok). For instance, the following snippet
>> >
>> > #+BEGIN_SRC python :results drawer
>> > import matplotlib.pyplot as plt
>> > plt.plot([1,2,3])
>> > plt.show()
>> > a=1
>> > print("a={}".format{a})
>> > #+END_SRC
>> >
>> > does not fontify correctly in either python or ipython source blocks.
>> >
>> > As a consequence, when exporting the org file to HTML (C-c C-e h h), it
>> > fails with the following message:
>> >
>> > font-lock-fontify-keywords-region: Invalid function: #<subr progn>
>>
>> I'm unable to reproduce this behavior on emacs 27.1 and git
>> master. Fontification and export work fine with this code block for me.
>>
>> Does the error still happen when you use emacs -q ? Or if you use git
>> master?
>>
>> Jack
>>
>>