From: Tony Arcieri <tony@...>
Date: 2008-02-20T05:13:58+09:00
Subject: Stange error when using profile.rb on Ruby 1.9

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I'm encountering a rather strange error when attempting to use profile.rb on
a Ruby 1.9 application:

/opt/ruby1.9/lib/ruby/gems/1.9.0/gems/case-0.4/lib/case.rb:22:in `next':
NULL pointer given (ArgumentError)
    from /opt/ruby1.9/lib/ruby/gems/1.9.0/gems/case-0.4/lib/case.rb:22:in
`each'
    from /opt/ruby1.9/lib/ruby/gems/1.9.0/gems/case-0.4/lib/case.rb:22:in
`zip'

The error does not occur when the code is not being profiled.  The code in
question looks like this:

  module Array
    def ===(obj)
      return false unless ::Array === obj
      zip(obj) { |e,o| return false unless e === o }
      true
    end
  end

The error itself is actually being raised in string.c:

VALUE
rb_str_new2(const char *ptr)
{
    if (!ptr) {
        rb_raise(rb_eArgError, "NULL pointer given");
    }
    return rb_str_new(ptr, strlen(ptr));
}

I have no idea how using profile.rb is causing a NULL pointer to be passed
to rb_str_new2 when zip is called...

-- 
Tony Arcieri
medioh.com

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<div class="gmail_quote">I&#39;m encountering a rather strange error when attempting to use profile.rb on a Ruby 1.9 application:<br clear="all"><br>/opt/ruby1.9/lib/ruby/gems/1.9.0/gems/case-0.4/lib/case.rb:22:in `next&#39;: NULL pointer given (ArgumentError)<br>

&nbsp;&nbsp;&nbsp; from /opt/ruby1.9/lib/ruby/gems/1.9.0/gems/case-0.4/lib/case.rb:22:in `each&#39;<br>&nbsp;&nbsp;&nbsp; from /opt/ruby1.9/lib/ruby/gems/1.9.0/gems/case-0.4/lib/case.rb:22:in `zip&#39;<br><br>The error does not occur when the code is not being profiled.&nbsp; The code in question looks like this:<br>

<br>&nbsp; module Array<br>&nbsp;&nbsp;&nbsp; def ===(obj)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return false unless ::Array === obj<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; zip(obj) { |e,o| return false unless e === o }<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; true<br>&nbsp;&nbsp;&nbsp; end<br>&nbsp; end<br><br>The error itself is actually being raised in string.c:<br>

<br>VALUE<br>rb_str_new2(const char *ptr)<br>{<br>&nbsp;&nbsp;&nbsp; if (!ptr) {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rb_raise(rb_eArgError, &quot;NULL pointer given&quot;);<br>&nbsp;&nbsp;&nbsp; }<br>&nbsp;&nbsp;&nbsp; return rb_str_new(ptr, strlen(ptr));<br>}<br><br>I have no idea how using profile.rb is causing a NULL pointer to be passed to rb_str_new2 when zip is called...<br>
<font color="#888888">
<br></font></div>-- <br>Tony Arcieri<br><a href="http://medioh.com">medioh.com</a>

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