Ruby Issue Tracking System

01/24/2024

08:41 AM Ruby Bug #20207 (Closed): Segmentation fault for a regexp containing positive and negative lookaheads

I'm getting segmentation fault for the following regexp with Ruby 3.3.0:
``` ruby
puts 'clan'.match?(/(?=.*a)(?!.*n)/)
```
This is the minimal example for which I was able to produce the issue. `a` and `n` in the above example
a... Sundeep (Sundeep Agarwal)

02/24/2018

02:13 AM Ruby Bug #14500: Missing Regexp documentation and clarification on behavior of \K for edge case

oh, I didn't check with `$10`. I'd tried with backreference. Any idea how to use `\10`?
```
$ echo 'abcdefghij' | ruby -pe 'sub(/(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)/, ":\\9:")'
:i:
$ echo 'abcdefghij' | ruby -pe 'sub(/(.)(.)(.)(.)(.)(.)... Sundeep (Sundeep Agarwal)

02/21/2018

05:07 AM Ruby Bug #14500 (Closed): Missing Regexp documentation and clarification on behavior of \K for edge case

**Capturing** section (https://ruby-doc.org/core-2.5.0/Regexp.html#class-Regexp-label-Capturing)
* formatting issue: `n<sup>th</sup>`
* suggestion to add a note on `\0` similar to the note mentioned in **Special global variables** (h... Sundeep (Sundeep Agarwal)