From: brabuhr@...
Date: 2011-06-14T09:49:52+09:00
Subject: Re: Syck dies on multiline regex

On Mon, Jun 13, 2011 at 3:34 PM, Josh Cheek <josh.cheek@gmail.com> wrote:
> # >> #<Syck::TypeError: Invalid Regular expression: "/a\n           b/x">
>
> Is this a bug?

Probably.

> If so, where should I report it?

http://redmine.ruby-lang.org/

Though, as noted, syck is not maintained and psych appears to be the future.

I have no idea what else I broke :-), but this change runs your sample:

$ ruby -v -S irb
ruby 1.8.7 (2009-06-12 patchlevel 174) [universal-darwin10.0]
>> require 'yaml'
=> true
>> [YAML, Marshal].each do |serializer|
?>  [/ab/x, /a
          b/x].each do |regex|
?>    begin
?>      serializer.load(serializer.dump regex)
>>    rescue
>>      p $!
>>    end
>>  end
>> end
=> [YAML, Marshal]

--- /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/yaml/rubytypes.rb.orig	2011-06-13
20:45:05.000000000 -0400
+++ /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/yaml/rubytypes.rb	2011-06-13
20:43:20.000000000 -0400
@@ -253,7 +253,7 @@
 class Regexp
     yaml_as "tag:ruby.yaml.org,2002:regexp"
     def Regexp.yaml_new( klass, tag, val )
-        if String === val and val =~ /^\/(.*)\/([mix]*)$/
+        if String === val and val =~ /^\/(.*)\/([mix]*)$/m
             val = { 'regexp' => $1, 'mods' => $2 }
         end
         if Hash === val