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copied!<p>Yep, that looks like a bug in the C syck library. I checked it out using the PHP syck bindings (v 0.9.3): <a href="http://pecl.php.net/package/syck" rel="nofollow noreferrer">http://pecl.php.net/package/syck</a> and the same bug is present, indicating it is a bug in the library as opposed to the ruby yaml library or ruby-syck bindings:</p> <pre><code>// phptestsyck.php <?php $message_text = " X X "; syck_load(syck_dump($message_text)); ?> </code></pre> <p>Running this on the cli gives the same SyckException:</p> <pre><code>$ php phptestsyck.php PHP Fatal error: Uncaught exception 'SyckException' with message 'syntax error on line 5, col 0: 'X'' in /.../phptestsyck.php:8 Stack trace: #0 /.../phptestsyck.php(8): syck_load('--- %YAML:1.0 >...') #1 {main} thrown in /.../phptestsyck.php on line 8 </code></pre> <p>So, I suppose you could try to fix Syck itself. It appears that the library hasn't been updated since v0.55 in May of 2005 (<a href="http://rubyforge.org/projects/syck/" rel="nofollow noreferrer">http://rubyforge.org/projects/syck/</a>), though.</p> <p>Alternately, there is a pure-ruby yaml parser called RbYAML (<a href="http://rbyaml.rubyforge.org/" rel="nofollow noreferrer">http://rbyaml.rubyforge.org/</a>) which originated with JRuby that doesn't appear to have this bug:</p> <pre><code>>> require 'rbyaml' => true >> message_text = <<END X X END => "\n X\nX\n" >> yaml = RbYAML.dump(message_text) => "--- "\\n X\\nX\\n"\n" >> RbYAML.load(yaml) => "\n X\nX\n" >> </code></pre> <p>Finally, have you considered another serialization format altogether? Ruby's Marshal library doesn't have this bug either and is faster than Yaml (see <a href="http://significantbits.wordpress.com/2008/01/29/yaml-vs-marshal-performance/" rel="nofollow noreferrer">http://significantbits.wordpress.com/2008/01/29/yaml-vs-marshal-performance/</a>):</p> <pre><code>>> message_text = <<END X X END => "\n X\nX\n" >> marshal = Marshal.dump(message_text) => "\004\b"\f\n X\nX\n" >> Marshal.load(marshal) => "\n X\nX\n" </code></pre>

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