From: Tom Cloyd <tomcloyd@...>
Date: 2008-05-20T20:22:15+09:00
Subject: Re: problems with error output interpretation

yermej wrote:
> On May 19, 5:28 am, Tom Cloyd <tomcl...@comcast.net> wrote:
>   
>> I hope this is an OK place to post this. I've been able to find another
>> more promising place.
>>
>> I'm running an extremely simple program, trying to start using the
>> Hpricot gem. I don't understand two things with some error output I'm
>> getting. Here's the program (obviously only a fragment at this time, but
>> that's 'cause I get in trouble easily):
>>
>> %w(rubygems logger hpricot ruby-debug).each{|lib| require lib }
>> doc = open("index.html") { |f| Hpricot(f) }
>> (doc/"div.page-content-div").inner_html
>>
>> Here's the console I'm seeing:
>>
>> $ ruby --debug content_capture.rb
>> Exception `LoadError' at /usr/lib/ruby/1.8/rubygems/custom_require.rb:27
>> - no such file to load -- hpricot
>> Exception `LoadError' at /usr/lib/ruby/1.8/rubygems/custom_require.rb:27
>> - no such file to load -- encoding/character/utf-8
>> Exception `LoadError' at /usr/lib/ruby/1.8/rubygems/custom_require.rb:34
>> - no such file to load -- encoding/character/utf-8
>> /var/lib/gems/1.8/gems/hpricot-0.6/lib/hpricot/builder.rb:11: warning:
>> `&' interpreted as argument prefix
>> Exception `LoadError' at /usr/lib/ruby/1.8/rubygems/custom_require.rb:27
>> - no such file to load -- ruby-debug
>> $
>>
>> First of all, there's nothing in this output which looks like a usable
>> (by me) trace - the first thing I want to know is WHERE in my program is
>> the error occurring. There aren't exactly many possibilities, but I'm
>> still not understanding why there isn't a traceback to the point of
>> origin of the problem in my tiny program. Makes no sense to me. I'm left
>> guessing. Am I missing something?
>>
>> Secondly, I don't see what the problem is. The file I'm trying to open
>> is assuredly there, and where I'm saying it is. Is this all errors from
>> hpricot?
>>
>> Any help would be much appreciated. I'm beached at this point.
>>
>> t.
>>
>> --
>>     
>
> Try running it without the --debug argument and see what happens. I'm
> sure somebody else can explain why, but the LoadError messages are
> common in debug output when using require. (Maybe it has something to
> do with gems?) Those errors don't have useful (to you) stack traces.
>
> Anyway, when I run your example with debug, I get the errors you
> posted followed by an error stating that 'index.html' is not found
> (because I didn't create one). So, your script is working; you're just
> getting confused by other libraries' debug output.
>
>
>   
Thank you very much. You were right. No "--debug" = no error messages. 
Game on. Thanks for rescuing me from my ignorance!

t.


-- 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Tom Cloyd, MS MA, LMHC
Private practice Psychotherapist
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