[ruby-core:86912] [Ruby trunk Bug#14539] Duplicate range in character class warning

Issue #14539 has been updated by vipulnsward (Vipul Amler).


shevegen (Robert A. Heiler) wrote:
> Agreed. Your code did not use more than one \X so the warning is
> incorrect as it is (because you did not use more than one \X, so
> at best, it may have originated from elsehwere, which was not 
> your fault then) - so it sounds like a bug IMO.
> 
> Since some grapheme-specific code was added in 2.5.x, I believe
> this may be a reason for the behaviour change compared to 
> ruby 2.4.x.

This warning now shows up on ActiveSupport: activesupport/lib/active_support/core_ext/string/filters.rb:109: warning: character class has duplicated range: /\X/

----------------------------------------
Bug #14539: Duplicate range in character class warning
https://bugs.ruby-lang.org/issues/14539#change-71874

* Author: Anonymous
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: >= 2.5.0
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
~~~ ruby
#!/usr/bin/env ruby -w
puts RUBY_VERSION
puts "".match?(/\X/).inspect
puts '--------------'
~~~

~~~ text
2.4.3
true
--------------
2.5.0
grapheme_warning.rb:3: warning: character class has duplicated range: /\X/
true
--------------
2.6.0
grapheme_warning.rb:3: warning: character class has duplicated range: /\X/
true
--------------
~~~

I don't think there's a duplicate range here, so there should not be a warning.



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