From: Kazuhiro NISHIYAMA <redmine@...>
Date: 2008-08-21T20:15:39+09:00
Subject: [ruby-dev:35899] [Bug #466] test_str_crypt(TestM17NComb) failed

Bug #466: test_str_crypt(TestM17NComb) failed
http://redmine.ruby-lang.org/issues/show/466

起票者: Kazuhiro NISHIYAMA
ステータス: Open, 優先度: Normal

$ 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
#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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