Division sometimes breaks syntax highlighting in ruby-mode

Question

Interesting bug in ruby-mode. When a variable called index is followed by a slash /, syntax highlighting breaks.

Here's a screenshot to show you what I mean:

I'm not really sure how to file a ticket on the ruby-mode repo since I've never used SVN. Anyone know where to go from here?

To report a bug in ruby-mode, you should M-x report-emacs-bug. ruby-mode is distributed with Emacs. I can reproduce the problem, but the way to fix it is non-obvious, and it doesn't seem inappropriate to have that discussion in StackExchange. Thanks. — Dmitry, Commented Jun 7, 2016 at 21:14
it doesn't seem inappropriate to have that discussion in StackExchange. Was that an intentional double-negative? Are you saying it is appropriate to have that discussion here? — harumph, Commented Jun 7, 2016 at 21:50
Interestingly it only happens with index, if you change the var's name is goes ok. — Henry Mazza, Commented Apr 9, 2020 at 13:07

Dmitry · Accepted Answer · 2023-12-09 17:59:08Z

3

Good news everyone!

This is now fixed upstream, and will be in the next Emacs release (29.2).

answered Jun 7, 2016 at 22:43

Dmitry

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I'm not sure I understand why distinguishing between a method on a string and a variable name is ambiguous. Wouldn't any variable name that also happens to be a method on a literal be problematic, in that case?
– harumph
Commented Jun 7, 2016 at 23:00
Also, I am going to submit a bug report.
– harumph
Commented Jun 7, 2016 at 23:01
The ambiguity I'm referring to here is between regexp delimiters and division.
– Dmitry
Commented Jun 7, 2016 at 23:05
Upvotes are nice and all, but would somebody file the bug?
– Dmitry
Commented Jun 15, 2016 at 12:20
1

Just want to add that I couldn't find the bug report if you did add it, and sent one in myself: debbugs.gnu.org/cgi/bugreport.cgi?bug=67569
– mjhoy
Commented Dec 1, 2023 at 16:01

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Trevoke · Accepted Answer · 2016-06-08 11:30:50Z

0

FWIW, if you use enh-ruby-mode, that problem doesn't occur.

answered Jun 8, 2016 at 11:30

Trevoke

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