From: "hsbt (Hiroshi SHIBATA) via ruby-core" <ruby-core@...>
Date: 2024-01-17T01:17:02+00:00
Subject: [ruby-core:116260] [Ruby master Bug#20185] String#ascii_only? buggy in ruby 3.3

Issue #20185 has been updated by hsbt (Hiroshi SHIBATA).





No, `Fix https://bugs.ruby-lang.org/issues/20185`of commit message is not correct format for redmine autolink. 



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Bug #20185: String#ascii_only? buggy in ruby 3.3

https://bugs.ruby-lang.org/issues/20185#change-106281



* Author: chucke (Tiago Cardoso)

* Status: Closed

* Priority: Normal

* ruby -v: 3.3.0

* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN

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

This was the smallest reduction of the bug I could come up with:



    require "stringio"



    puts StringIO::VERSION



    def is_ascii(buffer)

      str = buffer.string

      puts "\"#{str}\" is ascii: #{str.ascii_only?}"

    end



    buffer = StringIO.new("".b)



    buffer.write("a=b&c=d")

    buffer.rewind

    is_ascii(buffer)

    buffer.write "����������"

    is_ascii(buffer)



    # in ruby 3.3

    #=> 3.1.0

    #=> "a=b&c=d" is ascii: true

    #=> "����������" is ascii: true



    # in ruby 3.2

    #=> 3.0.4

    #=> "a=b&c=d" is ascii: true

    #=> "����������" is ascii: true



    # in ruby 3.1

    #=> 3.0.1

    #=> "a=b&c=d" is ascii: true

    #=> "����������" is ascii: false



I believe that only the 3.1 result is correct, as "����������" first character is not ascii.







-- 

https://bugs.ruby-lang.org/

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