From: Mariano Kamp <mariano.kamp@...>
Date: 2006-11-24T20:50:24+09:00
Subject: Re: Ruby hangs on OSX

Btw. The strange behaviour is not limited to stack overflows.

I also see now an interesting style of error reporting:

localhost:~//code/sudoku mkamp$ ruby sudoku_tests.rb
sudoku_tests.rb:231: warning: parenthesize argument(s) for future  
version
sudoku_tests.rb:232: warning: parenthesize argument(s) for future  
version
Loaded suite sudoku_tests
Started
..E..E...EEE.type: code total: 150, empty:  28, code: 103, comment:  19
type: test total: 286, empty:  59, code: 222, comment:   5
.
Finished in 0.052318 seconds.

^C  1) Error:
test_empty(SudokuTests):
NameError: undefined local variable or method `possible' for #<Sudoku: 
0x30b16c>
     ./sudoku.rb:74:in `solve'
     sudoku_tests.rb:125:in `test_empty'

^C  2) Error:
test_michl(SudokuTests):
NameError: undefined local variable or method `possible' for #<Sudoku: 
0x356018>
     ./sudoku.rb:74:in `solve'
     sudoku_tests.rb:119:in `test_michl'

^C  3) Error:
test_solve(SudokuTests):
NameError: undefined local variable or method `possible' for #<Sudoku: 
0x1de8dc>
     ./sudoku.rb:74:in `solve'
     sudoku_tests.rb:15:in `test_solve'

^C  4) Error:
test_solve_with_canned_complex_solution(SudokuTests):
NameError: undefined local variable or method `possible' for #<Sudoku: 
0x1c5c10>
     ./sudoku.rb:74:in `solve'
     sudoku_tests.rb:262:in `solve_and_compare'
     sudoku_tests.rb:97:in `test_solve_with_canned_complex_solution'

^C  5) Error:
test_solve_with_canned_simple_solution(SudokuTests):
NameError: undefined local variable or method `possible' for #<Sudoku: 
0x327e98>
     ./sudoku.rb:74:in `solve'
     sudoku_tests.rb:262:in `solve_and_compare'
     sudoku_tests.rb:47:in `test_solve_with_canned_simple_solution'

14 tests, 50 assertions, 0 failures, 5 errors

I have to press CTRL+C many times to end the program otherwise it  
hangs and eats my CPU.

Any ideas? Any?

Btw. I tried to recompile ruby without -O2 in the CFLAGS, but that  
didn't change a thing except a 50% performance penality.

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