From: "mame (Yusuke Endoh)" <noreply@...>
Date: 2022-03-31T01:14:03+00:00
Subject: [ruby-core:108129] [Ruby master Bug#18669] Warning `flags ignored` is displayed for `Regexp.new(/regexp/)`

Issue #18669 has been updated by mame (Yusuke Endoh).


Yes, it was my fault. Thank you for your report!

----------------------------------------
Bug #18669: Warning `flags ignored` is displayed for `Regexp.new(/regexp/)`
https://bugs.ruby-lang.org/issues/18669#change-97104

* Author: koic (Koichi ITO)
* Status: Closed
* Priority: Normal
* ruby -v: ruby 3.2.0dev (2022-03-30T14:08:13Z master 75efbb98af) [x86_64-darwin19]
* Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
----------------------------------------
I encountered an unexpected warning in Ruby 3.2.0dev.

## Reproduction code

```ruby
Regexp.new(/regexp/)
```

## Expected Behavior (Ruby 3.1.1)

No warnings.

```console
% ruby -vwe 'Regexp.new(/regexp/)'
ruby 3.1.1p18 (2022-02-18 revision 53f5fc4236) [x86_64-darwin19]
```

## Actual Behavior (Ruby 3.2.0dev)

`warning: flags ignored` is displayed.

```console
% ruby -vwe 'Regexp.new(/regexp/)'
ruby 3.2.0dev (2022-03-30T14:08:13Z master 75efbb98af) [x86_64-darwin19]
-e:1: warning: flags ignored
```

I encountered it in a RuboCop build error:
https://app.circleci.com/pipelines/github/rubocop/rubocop/5974/workflows/94732274-f302-497a-a6bc-ffbf036c4e0b/jobs/213494

Perhaps https://github.com/ruby/ruby/pull/5703 change is related.




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