From: Dennis Ranke <dennis.ranke@...>
Date: 2003-12-23T18:16:55+09:00
Subject: Re: Ruby 1.8.1 preview4

On Tue, 23 Dec 2003 11:55:06 +0900, NAKAMURA, Hiroshi 
<nakahiro@sarion.co.jp> wrote:

>> On a Playstation2 running linux:
>
> Thanks.  Very interesting.  Seems to be 3 kind of errors.
>
>
> [1, 2, 31, 32; floating point]
>
>>    1) Failure:
>> test_SOAPDouble(SOAP::TestSOAP) [./soap/test_basetype.rb:257]:
>> <"-0"> expected but was
>> <"+0">.
>
> How does this dump?
> $ ruby -e 'a = -0.0; p (1 / a > 0.0)'
>
> expecting false...
>
>>    2) Failure:
>> test_SOAPFloat(SOAP::TestSOAP)
>>      [./soap/test_basetype.rb:161:in `test_SOAPFloat'
>>       ./soap/test_basetype.rb:160:in `each'
>>       ./soap/test_basetype.rb:160:in `test_SOAPFloat']:
>> <1.4e-45> expected but was
>> <0.0>.
>
> Hmm...

Now that I come to think about it, these floating point errors would make 
sense if ruby used single-precision floats instead of doubles on the ps2 
hardware. The ps2 hardware only implements single-precision floats (which 
would explain failure 2) and doesn't comform to IEEE 754 in the borderline 
cases like infinity or denormalized numbers (which might explain failure 
1). I have no idea if this is a possibility, though.

> [3-9, 28-30; socket]
>>    3) Error:
>> test_charset(SOAP::TestStreamHandler):
>> SocketError: getaddrinfo: Temporary failure in name resolution
>
> $ ruby -rsocket -e 'p Socket.getaddrinfo("localhost", "http")'
>
> Same error?

I'll try that when I'm home later today.

> [10 - 27; strscan]
>> test_s_mustc(TestStringScanner) [./strscan/test_stringscanner.rb:43]:
>> Exception raised:
>> Class: <NotImplementedError>
>> Message: <"strscan is not C version">
>> ---Backtrace---
>> /usr/local/lib/ruby/site_ruby/1.8/rscan.rb:18:in `must_C_version'
>> ../strscan/test_stringscanner.rb:44:in `test_s_mustc'
>> ../strscan/test_stringscanner.rb:43:in `assert_nothing_raised'
>> ../strscan/test_stringscanner.rb:43:in `test_s_mustc'
>> ---------------
>
> Delete /usr/local/lib/ruby/site_ruby/1.8/rscan.rb and strscan related 
> file
> (/usr/local/lib/ruby/site_ruby/1.8/i686-linux/* or something).
> Would you please try it again then?

Yes, again when I'm home from work.

-- 
exoticorn/farbrausch