title: jekyll with broken front matter, how to find the broken file?
body: <p>When I make a syntax error in the front matter i'm getting the following error:</p>
  
  <pre><code> /.../psych.rb:203:in `parse': (&lt;unknown&gt;): could not find expected
   ':' while scanning a simple key at line 6 column 1
   (Psych::SyntaxError)
          from /.../psych.rb:203:in `parse_stream'
          from /.../psych.rb:151:in `parse'
              from ....
  </code></pre>
  
  <p>Do you know a way to tell what file caused the problem?</p>
  
  <p>I know that I could probably use DTrace as follows:</p>
  
  <pre><code>dtrace -n 'syscall::open*:entry { printf("%s %s",execname,copyinstr(arg0)); }'| grep _posts
  </code></pre>
  
  <p>But I'm looking for something more straight forward.</p>