From: Alex Young <alex@...>
Date: 2006-08-06T16:57:14+09:00
Subject: Re: How to redirect a string to stdin within code?

Robert Dober wrote:
<snip>
>> alex@pandora:~$ irb
>> irb(main):001:0> require 'stringio'
>> => true
>> irb(main):002:0> input = StringIO.new("myname")
>> => #<StringIO:0xb7a42864>
>> irb(main):003:0> $stdin = input
>> => #<StringIO:0xb7a42864>
>> /usr/lib/ruby/1.8/irb/input-method.rb:97: [BUG] Segmentation fault
>> ruby 1.8.4 (2005-12-24) [i486-linux]
>>
>> Aborted
>>
>>
>> This is on Ubuntu Breezy.  Any idea why that happens?
> 
> 
> Very interesting I was just trying it on my Dapper  and I get  similar but
> not identical behavior, see below.
> However this seems an IRB issue Logans code just works fine in pure ruby
Yes...  I can see why it's not allowed in IRB (if you get rid of stdin, 
how the hell would you use the console? :-), I just don't know why it 
segfaults.

> 
> 510/11 > irb
> irb(main):001:0> require 'stringio'
> => true
> irb(main):002:0> input = StringIO.new("myname")
> => #<StringIO:0xb7d2fe4c>
> irb(main):003:0> $stdin = input
> => #<StringIO:0xb7d2fe4c>
> irb(main):004:0> irb(main):004:0> NameError: undefined local variable or
> method `myname' for main:Object
>        from (irb):4
>        from :0
> irb(main):004:0> robert@:~/log/ruby/tests 09:43:16
> 
> and
> 
> 510/12 > uname -a
> Linux roma 2.6.15-19-386 #1 PREEMPT Mon Mar 20 16:46:02 UTC 2006 i686
> GNU/Linux
> robert@:~/log/ruby/tests 09:45:04
> 511/13 > ruby --version
> ruby 1.8.4 (2005-12-24) [i686-linux]
Interesting.  In principle, we should get the same results - the only 
difference is the target processor.  Allegedly.

-- 
Alex