# Debugger issue **URL:** \ **Category:** ruby-talk\ **Created:** [30 June 2005 18:17 UTC](https://rubytalk.org/t/debugger-issue/19277 "2005-06-30T18:17:48Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Guest15](https://avatars.discourse-cdn.com/v4/letter/g/6de8d8/32.png) [@Guest15](https://rubytalk.org/u/Guest15)\ **Post date:** [30 June 2005 18:17 UTC](https://rubytalk.org/t/debugger-issue/19277/1 "2005-06-30T18:17:48Z")
I'm running into an unexpected issue with the debugger, and I'm hoping someone here can help me out. I' ve got a short program like this (stolen directly from zenspider's RubyInline tutorial): > **···** > > -=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > #!/usr/local/bin/ruby -w > > class Array > >   def average >     result = 0 >     self.each { |x| result += x } >     result / self.size.to\_f >   end > > end > > max\_loop = (ARGV.shift || 5).to\_i > max\_size = (ARGV.shift || 100\_000).to\_i > a = (1..max\_size).to\_a > > 1.upto(max\_loop) do >   avg = a.average >   $stderr.print "." > end > $stderr.puts "" > -=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > > Everytime I step to line 7 (the self.each ... line) or do a step nnn which > executes line 7, the debugger stops there. Neither step or next will move > past this line. If I try to continue the program, it will run to the next > breakpoint or end of the program. > > -=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > pate@linux:~/scripts\> ruby -rdebug averager.rb > Debug.rb > Emacs support available. > > averager.rb:3:class Array > (rdb:1) s 13 > averager.rb:7: self.each { |x| result += x } > (rdb:1) s > averager.rb:7: self.each { |x| result += x } > (rdb:1) s > averager.rb:7: self.each { |x| result += x } > (rdb:1) s > averager.rb:7: self.each { |x| result += x } > (rdb:1) n > averager.rb:7: self.each { |x| result += x } > (rdb:1) n > averager.rb:7: self.each { |x| result += x } > (rdb:1) n > averager.rb:7: self.each { |x| result += x } > (rdb:1) n 20 > averager.rb:7: self.each { |x| result += x } > (rdb:1) c > ..... > pate@linux:~/scripts\> > -=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > > Any idea what's going on? Is this a bug in the debugger, or am I > misunderstanding something? > > -- > thanks, > -pate > ------------------------- > We are often unable to tell people what they need to know, because > they want to know something else, and would therefore only > misunderstand what we said > - the Raven (George MacDonald, Lilith) ---
**Author:** ![Florian\_Frank2](https://avatars.discourse-cdn.com/v4/letter/f/a587f6/32.png) [@Florian\_Frank2](https://rubytalk.org/u/Florian_Frank2)\ **Post date:** [30 June 2005 18:36 UTC](https://rubytalk.org/t/debugger-issue/19277/2 "2005-06-30T18:36:15Z")
pat eyler wrote: > max\_size = (ARGV.shift || 100\_000).to\_i max\_size = (ARGV.shift || 10).to\_i > **···** > > > a = (1..max\_size).to\_a > > -- > Florian Frank ---
**Author:** ![Robert](https://avatars.discourse-cdn.com/v4/letter/r/e95f7d/32.png) [@Robert](https://rubytalk.org/u/Robert)\ **Post date:** [1 July 2005 07:55 UTC](https://rubytalk.org/t/debugger-issue/19277/3 "2005-07-01T07:55:43Z")
pat eyler wrote: > I'm running into an unexpected issue with the debugger, and I'm > hoping someone here can help me out. I' ve got a short program like > this (stolen directly from zenspider's RubyInline tutorial): > > -=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > #!/usr/local/bin/ruby -w > > class Array > >   def average >     result = 0 >     self.each { |x| result += x } >     result / self.size.to\_f >   end > > end > > max\_loop = (ARGV.shift || 5).to\_i > max\_size = (ARGV.shift || 100\_000).to\_i > a = (1..max\_size).to\_a > > 1.upto(max\_loop) do >   avg = a.average >   $stderr.print "." > end > $stderr.puts "" > -=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > > Everytime I step to line 7 (the self.each ... line) or do a step nnn > which executes line 7, the debugger stops there. Neither step or > next will move past this line. If I try to continue the program, it > will run to the next breakpoint or end of the program. > > -=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > pate@linux:~/scripts\> ruby -rdebug averager.rb > Debug.rb > Emacs support available. > > averager.rb:3:class Array > (rdb:1) s 13 > averager.rb:7: self.each { |x| result += x } > (rdb:1) s > averager.rb:7: self.each { |x| result += x } > (rdb:1) s > averager.rb:7: self.each { |x| result += x } > (rdb:1) s > averager.rb:7: self.each { |x| result += x } > (rdb:1) n > averager.rb:7: self.each { |x| result += x } > (rdb:1) n > averager.rb:7: self.each { |x| result += x } > (rdb:1) n > averager.rb:7: self.each { |x| result += x } > (rdb:1) n 20 > averager.rb:7: self.each { |x| result += x } > (rdb:1) c > .... > pate@linux:~/scripts\> > -=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > > Any idea what's going on? Is this a bug in the debugger, or am I > misunderstanding something? My guess would be that Array#each is a method implemented in C and that your block is just a single line block. The debugger can't step into Array#each and maybe it cannot stop in the block because it's on the same line. Did you try to convert the block to a multiline block? If you step over that line then you execute a single each call, which happens to execute multple callbacks of the block. Kind regards     robert ---
**Author:** ![Guest15](https://avatars.discourse-cdn.com/v4/letter/g/6de8d8/32.png) [@Guest15](https://rubytalk.org/u/Guest15)\ **Post date:** [30 June 2005 18:55 UTC](https://rubytalk.org/t/debugger-issue/19277/4 "2005-06-30T18:55:50Z")
> pat eyler wrote: > > \>max\_size = (ARGV.shift || 100\_000).to\_i > \> > \> > max\_size = (ARGV.shift || 10).to\_i > > \>a = (1..max\_size).to\_a > \> this minimizes, but doesn't solve, the problem. stepping to line 13 shouldn't trip on line 7 at all should it, or should it? > **···** > > On 6/30/05, Florian Frank \ wrote: > > > \> > > -- > > Florian Frank > > -- > thanks, > -pate > ------------------------- > We are often unable to tell people what they need to know, because > they want to know something else, and would therefore only > misunderstand what we said > - the Raven (George MacDonald, Lilith) ---
**Author:** ![Lothar\_Scholz2](https://avatars.discourse-cdn.com/v4/letter/l/f14d63/32.png) [@Lothar\_Scholz2](https://rubytalk.org/u/Lothar_Scholz2)\ **Post date:** [1 July 2005 08:50 UTC](https://rubytalk.org/t/debugger-issue/19277/5 "2005-07-01T08:50:22Z")
Hello Robert, > My guess would be that Array#each is a method implemented in C and that > your block is just a single line block. The debugger can't step into > Array#each and maybe it cannot stop in the block because it's on the same > line. Did you try to convert the block to a multiline block? Correct it is a fundamental problem with the current ruby implementation and it does work when there are two code lines like    def average      result = 0      self.each { |x|         dummy = 1         result += x      }      result / self.size.to\_f    end > **···** > > -- > Best regards, emailto: scholz at scriptolutions dot com > Lothar Scholz [http://www.ruby-ide.com](http://www.ruby-ide.com) > CTO Scriptolutions Ruby, PHP, Python IDE 's ---
**Author:** ![Florian\_Frank2](https://avatars.discourse-cdn.com/v4/letter/f/a587f6/32.png) [@Florian\_Frank2](https://rubytalk.org/u/Florian_Frank2)\ **Post date:** [30 June 2005 19:19 UTC](https://rubytalk.org/t/debugger-issue/19277/6 "2005-06-30T19:19:37Z")
pat eyler wrote: > this minimizes, but doesn't solve, the problem. stepping to line 13 shouldn't trip on line 7 at all should it, or should it? The block call is a step on its own, you can "s 99990" if you really want. The "line" is a bit misleading, it's probably named after the line event of the trace function. > **···** > > -- > Florian Frank