From: KOSAKI Motohiro <kosaki.motohiro@...>
Date: 2011-07-23T08:57:37+09:00
Subject: [ruby-core:38412] Re: [Ruby 1.9 - Bug #5003] Enumerator#next segfaults in OS X Lion (10.7)

> I tired applying the diff from r32201 to 1.9.2p290, and while it mostly works, and seems to fix this problem, it also causes another. �In our rails app, which used to work just fine on 1.9.2p290 on OS X Snow Leopard, I get the following error running a rails console:
>
>
> /Users/mconway/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.0/lib/rails/commands.rb:21:in `<top (required)>': uninitialized fiber (FiberError)
> � � � �from script/rails:10:in `require'
> � � � �from script/rails:10:in `<main>'
>
> I built on OS X Lion, using rvm 1.6.25, and XCode 4.1 (4B110) (/usr/bin/gcc)
> Not sure if the patch is just not compatible with 1.9.2 branch, or if something else is going on. �A vanilla rails app loads just fine, so could be something in our stack - just weird that it used to work before this patch.

I think your issue is the same with [Bug #5082]. we now tracking by
another ticket.
If you want to know our Lion activity, please track aggregated ticket
[Bug #5076].

In fact, XCode4.1 gcc is NOT truth gcc. it's gcc-llvm. and llvm
optimization seems have
a lot of over optimization issue. I recommend to use gcc-4.2 (i.e.
true gcc) instead until we
finish our llvm adoption.

Thanks.