Ruby 1.9.0 and the debugger

I’ve built Ruby 1.9 and all is well with that. With respects to using
the debugger, the README says “use rb_debug”. Now does that mean
require rb_debug in an irb session or am I to recompile Ruby to
include support for the debugger?

irb(main):004:0> require rb_debug.rb
NameError: undefined local variable or method rb_debug' for main:Object from (irb):4 from /usr/local/lib/ruby/1.9.0/irb.rb:150:inblock (2 levels)
in eval_input’ from /usr/local/lib/ruby/1.9.0/irb.rb:259:in
signal_status' from /usr/local/lib/ruby/1.9.0/irb.rb:147:inblock in
eval_input’ from /usr/local/lib/ruby/1.9.0/irb.rb:146:in eval_input' from /usr/local/lib/ruby/1.9.0/irb.rb:70:inblock in start’
from /usr/local/lib/ruby/1.9.0/irb.rb:69:in catch' from /usr/local/lib/ruby/1.9.0/irb.rb:69:instart’
from /usr/local/bin/irb:13:in `’

I’ve tried to find some docs on this via ri debug:-

More than one method matched your request. You can refine
your search by asking for information on one of:

 IRB::Context#debug_level=, IRB::Context#debug?, Logger#debug,
 Logger#debug?, Net::SMTP#debug_output=, Net::SMTP#set_debug_output,
 Net::HTTP#set_debug_output, Net::POP3#set_debug_output,
 Net::IMAP::debug=, Net::IMAP::debug, DEBUGGER__::debug_thread_info,
 DEBUGGER__#debug_silent_eval, DEBUGGER__#debug_variable_info,
 DEBUGGER__#debug_funcname, DEBUGGER__#debug_eval,
 DEBUGGER__#debug_method_info, DEBUGGER__#debug_command,
 DEBUGGER__#debug_print_help, WEBrick::BasicLog#debug,
 WEBrick::BasicLog#debug?, Shell::debug=, Shell#debug=,
 RubyLex::debug?, Ripper#yydebug=, Ripper#yydebug

Regards,

John M.
MSc (DIC)
+44 7739 171 531

On Jan 23, 2008, at 5:26 PM, John M. wrote:

I’ve built Ruby 1.9 and all is well with that. With respects to using
the debugger, the README says “use rb_debug”. Now does that mean
require rb_debug in an irb session or am I to recompile Ruby to
include support for the debugger?

irb(main):004:0> require rb_debug.rb
NameError: undefined local variable or method `rb_debug’ for
main:Object

require “rb_debug.rb”

You need to have the quotes around it, because it takes a String :slight_smile:

HTH,
Ari

John M. wrote:

I’ve built Ruby 1.9 and all is well with that. With respects to using
the debugger, the README says “use rb_debug”. Now does that mean
require rb_debug in an irb session or am I to recompile Ruby to
include support for the debugger?

Ahh. For some reason I thought that since ruby-debug didn’t work with
1.9 [yet] that there was no debugger for 1.9. But apparently there
is–the default built-in [albeit slow] one. Silly me.

Note also that there’s “ruby unroller” if anybody wants to see the trace
of their program executing:
http://unroller.rubyforge.org/

i.e.
| | | call_one
| | | | return 3
| | | more stuff

Cheers.
-=r

In article [email protected],

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