From: nobu@...
Date: 2014-12-22T22:45:46+00:00
Subject: [ruby-dev:48766] [ruby-trunk - Bug #466]	test_str_crypt(TestM17NComb) failed

Issue #466 has been updated by Nobuyoshi Nakada.

Description updated
ruby -v set to 1.9.0

----------------------------------------
Bug #466: test_str_crypt(TestM17NComb) failed
https://bugs.ruby-lang.org/issues/466#change-50566

* Author: Kazuhiro NISHIYAMA
* Status: Closed
* Priority: Normal
* Assignee: Kazuhiro NISHIYAMA
* Category: core
* Target version: 
* ruby -v: 1.9.0
* Backport: 
----------------------------------------
~~~
$ ruby-trunk -v
ruby 1.9.0 (2008-08-21 revision 18753) [powerpc-darwin9.4.0]
~~~
の環境でtest_str_crypt(TestM17NComb)がFailureになります。

~~~
$ ruby-trunk test/ruby/test_m17n_comb.rb -v -n /crypt/
Loaded suite test/ruby/test_m17n_comb
Started
test_str_crypt(TestM17NComb): F

Finished in 0.03673 seconds.

  1) Failure:
test_str_crypt(TestM17NComb)
    [test/ruby/test_m17n_comb.rb:800:in `block in test_str_crypt'
     /Users/nishiyamakazuhiro/wc/ruby-lang/trunk/test/ruby/allpairs.rb:83:in `block in each'
     /Users/nishiyamakazuhiro/wc/ruby-lang/trunk/test/ruby/allpairs.rb:75:in `block in each_index'
     /Users/nishiyamakazuhiro/wc/ruby-lang/trunk/test/ruby/allpairs.rb:46:in `block in make_large_block'
     /Users/nishiyamakazuhiro/wc/ruby-lang/trunk/test/ruby/allpairs.rb:26:in `block (2 levels) in make_basic_block'
     /Users/nishiyamakazuhiro/wc/ruby-lang/trunk/test/ruby/allpairs.rb:21:in `times'
     /Users/nishiyamakazuhiro/wc/ruby-lang/trunk/test/ruby/allpairs.rb:21:in `block in make_basic_block'
     /Users/nishiyamakazuhiro/wc/ruby-lang/trunk/test/ruby/allpairs.rb:20:in `times'
     /Users/nishiyamakazuhiro/wc/ruby-lang/trunk/test/ruby/allpairs.rb:20:in `make_basic_block'
     /Users/nishiyamakazuhiro/wc/ruby-lang/trunk/test/ruby/allpairs.rb:45:in `make_large_block'
     /Users/nishiyamakazuhiro/wc/ruby-lang/trunk/test/ruby/allpairs.rb:71:in `each_index'
     /Users/nishiyamakazuhiro/wc/ruby-lang/trunk/test/ruby/allpairs.rb:82:in `each'
     test/ruby/test_m17n_comb.rb:118:in `combination'
     test/ruby/test_m17n_comb.rb:794:in `test_str_crypt']:
"".force_encoding("ASCII-8BIT").crypt("\xE0\xA0\xA1".force_encoding("UTF-8")).
<"\xE0\xA0fT7zdRv9Y7A"> expected but was
<"\xE0\xA0swiH3o6yAu2">.

1 tests, 55 assertions, 1 failures, 0 errors
$
~~~

~~~
$ ruby-trunk -ve '3.times{p "".crypt("\xE0\xA0")}'                              ruby 1.9.0 (2008-08-21 revision 18753) [powerpc-darwin9.4.0]
"\xE0\xA0X8NBuQ4l6uQ"
"\xE0\xA0fT7zdRv9Y7A"
"\xE0\xA0fT7zdRv9Y7A"
$
~~~
のように2回目以降で結果が違うのが原因のようです。

直接crypt(2)を同じ引数で呼んでも同じ結果になります。

~~~
$ cat a.c
~~~
~~~c
#include <stdio.h>
#include <unistd.h>

int main()
{
        printf("%s\n", crypt("", "\xE0\xA0"));
        printf("%s\n", crypt("", "\xE0\xA0"));
        printf("%s\n", crypt("", "\xE0\xA0"));
        return 0;
}
~~~
~~~
$ gcc a.c
$ ./a.out |LANG=C cat -v
M-`M- X8NBuQ4l6uQ
M-`M- fT7zdRv9Y7A
M-`M- fT7zdRv9Y7A
~~~




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