From: "jeremyevans0 (Jeremy Evans) via ruby-core" <ruby-core@...>
Date: 2023-03-24T20:08:21+00:00
Subject: [ruby-core:113000] [Ruby master Bug#19455] Ruby 3.2: wrong Regexp encoding with non-ASCII comments

Issue #19455 has been updated by jeremyevans0 (Jeremy Evans).





I submitted a pull request to fix this: https://github.com/ruby/ruby/pull/7592 



----------------------------------------

Bug #19455: Ruby 3.2: wrong Regexp encoding with non-ASCII comments

https://bugs.ruby-lang.org/issues/19455#change-102532



* Author: janosch-x (Janosch M�ller)

* Status: Open

* Priority: Normal

* ruby -v: ruby 3.2.0 (2022-12-25 revision a528908271)

* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN

----------------------------------------

comments and comment groups don't trigger the correct `Regexp#encoding` on Ruby 3.2 anymore:



```ruby

# ruby 3.1

/#a/x.encoding          # => #<Encoding:US-ASCII> # OK

/(?#a)/.encoding        # => #<Encoding:US-ASCII> # OK

/#�/x.encoding          # => #<Encoding:UTF-8>    # OK

/(?#�)/.encoding        # => #<Encoding:UTF-8>    # OK



# ruby 3.2

/#a/x.encoding          # => #<Encoding:US-ASCII> # OK

/(?#a)/.encoding        # => #<Encoding:US-ASCII> # OK

/#�/x.encoding          # => #<Encoding:US-ASCII> # BUG

/(?#�)/.encoding        # => #<Encoding:US-ASCII> # BUG



/#�/x.inspect           # => "/#\\xC3\\xBC/x"

/(?#�)/.inspect         # => "/(?#\\xC3\\xBC)/"



# bug is hidden if there are non-ascii chars outside comments

/�#�/x.encoding         # => #<Encoding:UTF-8>

/�(?#�)/.encoding       # => #<Encoding:UTF-8>

```



i think these changes might be the cause: https://github.com/ruby/ruby/commit/ec3542229b29ec93062e9d90e877ea29d3c19472#diff-c3675fa319803b2f5a775defa40694edb9a761baa3a54fa78e1fdef8f918cc7cR2837-R2890



@jeremyevans0 JFYI







-- 

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