From: Brian Candler <b.candler@...>
Date: 2010-09-08T19:36:11+09:00
Subject: Re: Regex breaks when string contains binary data

Aisha Fenton wrote:
> I can't see why the following Regex isn't working as expected. Maybe a
> bug in ruby?
> 
> puts "345HI".match(/HI|BYE/).inspect
>> HI
> puts "\345HI".match(/HI|BYE/).inspect
>> nil

Are you typing this in irb? Are you using any dodgy irb plugins like 
wirble or anything else in .irbrc?

You should get a MatchData object as the response. For me it works 
exactly as expected: this is under Ubuntu Lucid with the stock 1.8.7 
packages.

$ irb --simple-prompt
>> RUBY_VERSION
=> "1.8.7"
>> RUBY_DESCRIPTION
=> "ruby 1.8.7 (2010-01-10 patchlevel 249) [x86_64-linux]"
>> puts "345HI".match(/HI|BYE/).inspect
#<MatchData "HI">
=> nil
>> puts "\345HI".match(/HI|BYE/).inspect
#<MatchData "HI">
=> nil
>> puts "\345KI".match(/HI|BYE/).inspect
nil
=> nil

> I'm using Ruby 1.8.7

What exact version of ruby 1.8.7? (Show ruby -v). And where did you get 
it from? Did you compile it yourself from source, or did you install a 
ready-made binary package - if so, which one?

What operating system are you running under?

What results do you get if you try the following in irb?

>> "\345HI".match(/HI|BYE/)
=> #<MatchData "HI">
>> "\345HI" =~ /HI|BYE/
=> 1
>> "\345HI".bytes.to_a
=> [229, 72, 73]
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