Hi,

   still not sure what the problem really is about. As nobody  
answered I assume this is something with my two described fresh  
installs?

   Anyway ... What I found is that reducing the stack size from 8192  
to 4096 with "ulimit -s 4096" it works. I get the stacklevel too deep  
error.

   Now I am wondering what the "right" value and why is nobody else  
hitting that wall?

Cheers,
Mariano


On Nov 22, 2006, at 3:39 PM, Mariano Kamp wrote:

> Hi,
>
>   I encountered a strange problem.
>
>   When running "ruby soduku_test.rb -n test_next_cell" the process  
> hangs and eats up all of the assigned CPU . I have no idea why that  
> is ... I asked a friend to run it on windows and it does work  
> there. The program yield in a stack overflow.
>
>   I recently reinstalled my computer and used darwinports. I don't  
> think that I've seen that problem before. I also reinstalled ruby  
> again, but with not much success and the same thing happens on  
> another Mac too.
>
>   Installing ruby the way I used to do it before, using the  
> hivelogic tutorial, also didn't work.
>
>   That are the versions that fail:
>
>   ruby 1.8.5 (2006-08-25) [i686-darwin8.8.3] # darwin ports 1.3.1,  
> gcc 4.0
>   ruby 1.8.4 (2005-12-24) [i686-darwin8.8.3] # directly from the  
> sources (hivelogic tutorial)
>   ruby 1.8.2 (2004-12-25) [universal-darwin8.0] # comes with Tiger
>
>   Both Macs (MB C2D, MBP CD) are running OSX 10.4.8 with all updates.
>
>   uname -v:
> Darwin Kernel Version 8.8.3: Wed Oct 18 21:57:10 PDT 2006;  
> root:xnu-792.15.4.obj~4/RELEASE_I386
>
>   A stack trace of the "working" run on Windows is below this mail.
>
>   I attached the code. Unfortunately I haven't been able to isolate  
> the problem, but at least the code consistently fails.
>
>   Any ideas? Can somebody please try it out on another Mac? I will  
> also do that later on.
>
> Cheers,
> Mariano
>
> <sudoku_test.rb>
> <sudoku.rb>
>
>
>  1) Error:
> test_next_cell(SudokuTests):
> SystemStackError: stack level too deep
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:344:in `deq'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:343:in `deq'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:171:in  
> `break_outmost_groups'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:197:in `text'
>     C:/dev/ruby/lib/ruby/1.8/pp.rb:258:in `pretty_print_cycle'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:224:in `group'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:247:in `nest'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:223:in `group'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:235:in `group_sub'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:222:in `group'
>     [.. tons of repetition ]
>     C:/dev/ruby/lib/ruby/1.8/pp.rb:142:in `object_address_group'
>     C:/dev/ruby/lib/ruby/1.8/pp.rb:192:in `pp_object'
>     C:/dev/ruby/lib/ruby/1.8/pp.rb:249:in `pretty_print'
>     C:/dev/ruby/lib/ruby/1.8/pp.rb:126:in `pp'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:224:in `group'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:247:in `nest'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:223:in `group'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:235:in `group_sub'
>     C:/dev/ruby/lib/ruby/1.8/prettyprint.rb:222:in `group'
>     C:/dev/ruby/lib/ruby/1.8/pp.rb:126:in `pp'
>     C:/dev/ruby/lib/ruby/1.8/pp.rb:69:in `pp'
>     C:/dev/ruby/lib/ruby/1.8/pp.rb:105:in `guard_inspect_key'
>     C:/dev/ruby/lib/ruby/1.8/pp.rb:69:in `pp'
>     sudoku_test.rb:53:in `test_next_cell'
>
> 6 tests, 23 assertions, 0 failures, 1 errors