From: "k_takata (Ken Takata)" <redmine@...>
Date: 2013-05-14T18:23:23+09:00
Subject: [ruby-core:54979] [Backport93 - Backport #8210] Multibyte character interfering with end-line character within a regex


Issue #8210 has been updated by k_takata (Ken Takata).


Hi usa,

> * regexec.c (onig_search): fix problem with optimization of \z.
>   [Backport #8210]
>   patched by k_tanaka at [ruby-core:54251].

Thank you for merging my patch.
BTW, my name is not tanaka...
----------------------------------------
Backport #8210: Multibyte character interfering with end-line character within a regex
https://bugs.ruby-lang.org/issues/8210#change-39329

Author: sawa (Tsuyoshi Sawada)
Status: Closed
Priority: Normal
Assignee: usa (Usaku NAKAMURA)
Category: 
Target version: 


=begin
With this regex:

    regex1 = /\z/

the following strings match as expected:

    "hello" =~ regex1 # => 5
    "���������������" =~ regex1 # => 5

but with these regexes:

    regex2 = /#$/?\z/
    regex3 = /\n?\z/

they show difference:

    "hello" =~ regex2 # => 5
    "hello" =~ regex3 # => 5
    "���������������" =~ regex2 # => nil
    "���������������" =~ regex3 # => nil

The string encoding is UTF-8, and the OS is Linux (i.e., `$/` is `"\n"`). I expect them to behave the same, and believe this is a bug.
=end


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