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Date: Wed, 2 Jan 2008 23:43:51 -0500
From: "Mike Boone" <boonedocks AT gmail DOT com>
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Subject: Re: Ruby on Rails 2.0.2/Cygwin Bug
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On Dec 22, 2007 3:46 PM, Igor Peshansky <pechtcha AT cs DOT nyu DOT edu> wrote:
> As I mentioned before, I don't use Ruby too often.  But I just realized
> something: to reproduce the error, you needed a "require
> 'nonexistent_file'", which will obviously set errno to ENOENT (which is
> exactly the error you're seeing).  It's possible that File.read checks
> errno and exits right away if it's non-zero, and that nothing resets errno
> before File.read.  Inserting the puts call will likely reset errno, thus
> avoiding the bug.  So, the bug is probably in Ruby code for exception
> handling ("rescue") -- it should reset errno so that subsequent code isn't
> affected (and it's also suspicious that the File.read code checks errno
> without a valid reason, e.g., a non-zero return value).

Looks like you got it right. They just fixed the Ruby source:
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/branches/ruby_1_8/io.c?r1=13774&r2=14858

I made the change to my io.c in the stable-snapshot and it compiles OK
and runs my test script without the not-found error.

Not sure how long this will take to find its way into Cygwin's ruby
package, but I'm glad it was finally solved.

Mike Boone.

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