AsciiMath rendering does not work

Well, the title explains it quite accurately. AsciiMath rendering does not work. The "Render Math" button doesn't do anything. The problem occurs in Vivaldi (chromium-based) as well as in Firefox (and at least in Firefox I don't have any script blockers or similar stuff installed).

Another problem: Sometimes, when I try to submit a correction, it also doesn't work. I can skip the submission (despite getting an "Unable to skip submission" error) and after that submitting works again for one or two submissions, until I get the bug again.

This is the error output of the developer console when trying to press the submit button:

I've moved this to a separate issue so we don't lose track of it.

changed title from AsciiMath rendering does not work to AsciiMath rendering does not work (and other problems)

mentioned in issue #271

AsciiMath rendering works on my end (in firefox and chromium). Could you please tell us on which instance and on what submissions this issue happens?

Ideally, please provide the text of the submission where it doesn't work.

The instance is cs2-ue/sose21. I've already completed the corrections for this week, but it also happens on all submissions in the participants overview (at least I haven't found any submission where AsciiMath works). When I try to use the "Render math" button I always get the above "Failed to execute splitText..." error in the developer console (not sure if this is of any help).

Update: When I login, AsciiMath works. I can also toggle it off and on. However, there seem to be some submissions that break it and after that it doesn't work anymore for any submission until I reload the page (re-login is not sufficient). One of those submissions is the one for uebung06 of Jan Henrik Magnus Jacobsen. So, to reproduce this:

• Log in to Grady (obvious)
• Open the above mentioned submission
• Press the reset math button
• After that you should be unable to render AsciiMath for any submission

It's super weird that it renders correctly the first time, but then dies when you toggle the rendering.

According to the debugger it breaks on this line:

| <4><4>$gamma$ | $^^$1$vv$$neg$1 §§ | <4>$rarr$$^^$<3><4> |

But putting just that line in a jsbin with Mathjax and the same settings we use in grady works.

Also, when you open a different submission afterwards and the error happens again, you can still spot the "| <4><4>" in the debugger. Even though this is a different call of Mathjax.typeset and the broken line is no longer anywhere on the page.

changed title from AsciiMath rendering does not work (and other problems) to AsciiMath rendering does not work

Ok, it seems like MathJax keeps some internal cache of everything it has typeset so far. We need to clear that cache whenever we reset math by calling Mathjax.typesetClear. Then the math rendering should at least work again when switching to another submission.

Some more submissions where this error occurs are uebung06 Till Krebs and uebung06 Meikel Lehmann. (Not sure if this helps you, but I wanted to note it just in case it does.)

mentioned in merge request !278 (merged)

closed with merge request !278 (merged)