(Python) Part of an identifier is highlighted as a keyword

[wjandrea]

Describe the issue

Syntax highlighting changes halfway through a Python identifier _undef to look like the def keyword.

Which language seems to have the issue?

python

Are you using highlight or highlightAuto?
I don't know what that means. I assume it's about how highlight.js is deployed, but I'm an end user, not a Stack Exchange dev.

Sample Code to Reproduce

foo = _undef
bar

https://jsfiddle.net/td6a2fhg/

Screenshot of fiddle:

Expected behavior

GitHub gets it right.

All other syntax highlighters I checked don't seem to highlight anything.

Additional context

• This issue started with 11.0.0 and does not exist in 10.7.3
• I noticed the problem "in the wild" on this Stack Overflow answer.
• The HTML output from the fiddle:

  <code class="python lang-python hljs language-python">foo = _un<span class="hljs-keyword">def</span>
  <span class="hljs-title function_">bar</span>
  </code>

• The issue doesn't occur when the identifier is followed by a different token, like a literal:

  foo = _undef
  []

[joshgoebel]

Any chance you could confirm the fix? Seems to work here.

[wjandrea]

@joshgoebel I'm not really sure how. I tried forking my fiddle, but I can't figure out where to get highlight.min.js. Does it have to be compiled? I'm not a dev, to be clear.

Either way, if it's working for you, I can take your word for it 🙂