Issue #14367 has been updated by naruse (Yui NARUSE).


It looks inconsistency handling between regexp and Ruby's for `\c\xff`:
```
%  LC_ALL=C ruby -ve 'p (/\c\xff/ =~ "\x1f")'
ruby 2.7.1p83 (2020-03-31 revision a0c7c23c9c) [x86_64-darwin18]
0
```

----------------------------------------
Bug #14367: Wrong interpretation of backslash C in regexp literals
https://bugs.ruby-lang.org/issues/14367#change-85421

* Author: shyouhei (Shyouhei Urabe)
* Status: Open
* Priority: Normal
* ruby -v: ruby 2.6.0dev (2018-01-16 trunk 61875) [x86_64-darwin15]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
Following ruby code returns nil.

```sh
% LC_ALL=C ruby -ve 'p(/\c\xFF/ =~ "\c\xFF")'
ruby 2.6.0dev (2018-01-16 trunk 61875) [x86_64-darwin15]
nil
```

Is this intentional?



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