problems with error output interpretation

[Tom Cloyd]

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.

--

 

[yermej]

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.

 

[Tom Cloyd]

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
Bellingham, Washington, U.S.A: (360) 920-1226
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