Ruby breakpoint has weird idea of what local_variables are?

Ruby
1

Hi,

I’ve got a 7-liner:
require ‘rubygems’
require ‘breakpoint’

a = ‘aaa’
b = ‘bbb’
breakpoint
c = ‘ccc’

In a Command window, I’ve got:
K:_Projects\Ruby_Ruby_Tests\TestBreakpoint>ruby TestBreakpoint.rb
Executing break point at TestBreakpoint.rb:9
irb(main):001:0> local_variables
=> [“id”, “block”, “_”]
irb(main):002:0> quit

This test is based on Recipe 17.10 of the Ruby Cookbook, O’Reilly,
2006

Why doesn’t the array allegedly presenting local variables:

  1. Include a, b & c?
  2. Present the things it does; what do they signify?

I’m running Ruby 1.8.6 over WinXP-Pro/SP3

Thanks in Advance
Richard

2

2010/5/31 RichardOnRails [email protected]:

Why doesn’t the array allegedly presenting local variables:

  1. Include a, b & c?
  2. Present the things it does; what do they signify?

I’m running Ruby 1.8.6 over WinXP-Pro/SP3

No idea. However, the “regular” debugger does not have that issue:

Robert@babelfish ~
$ ruby19 -r debug x.rb
Debug.rb
Emacs support available.

x.rb:1:a = ‘aaa’
(rdb:1) l
[-4, 5] in x.rb
=> 1 a = ‘aaa’
2 b = ‘bbb’
3 # breakpoint
4 c = ‘ccc’
(rdb:1) b 4
Set breakpoint 1 at x.rb:4
(rdb:1) v l
a => nil
b => nil
c => nil
(rdb:1) c
Breakpoint 1, toplevel at x.rb:4
x.rb:4:c = ‘ccc’
(rdb:1) v l
a => “aaa”
b => “bbb”
c => nil
(rdb:1) n

Robert@babelfish ~
$

Note: “v l” lists local variables.

Kind regards

robert

3

On May 31, 3:16 pm, Robert K. [email protected] wrote:

a = ‘aaa’

3 # breakpoint
(rdb:1) v l
Kind regards

robert

–
remember.guy do |as, often| as.you_can - without endhttp://blog.rubybestpractices.com/

Hi Robert,

Thanks for your reply. It led me to realize that I had mixed up two
debuggers. I’m using the command “rdebug x.rb” and it appears to
invoke ruby-debug. That works great!

I wanted to elect some options for ruby-debug but could not find the
file recommended by some online documentation: rdebugrc. I hten found
another recommendation for Windows:rdebug.ini. That doesn’t exist
either.

I found an rdebug file with no extension in the directory where Ruby
is installed. It’s a ~200-line Ruby program that looks like a driver
for the Debugger, so that doesn’t look like a place for me to try to
customize the options.

This is not a big deal. But if anything comes to mind, I’d be
grateful to learn about it.

Best wishes,
Richard

4

On Jun 4, 9:53 pm, RichardOnRails
[email protected] wrote:

require ‘breakpoint’
=> [“id”, “block”, “_”]

=> 1 a = ‘aaa’
Breakpoint 1, toplevel at x.rb:4
Note: “v l” lists local variables.
Thanks for your reply. It led me to realize that I had mixed up two
for the Debugger, so that doesn’t look like a place for me to try to
customize the options.

This is not a big deal. But if anything comes to mind, I’d be
grateful to learn about it.

Best wishes,
Richard

Hi Robert,

Please forgot about my last question. I found comprehensive
documentation at ruby-debug, do I’ll be
fine.

Thanks again,
Richard