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Date: Tue, 22 Jul 2014 16:39:00 +0000
From: Eric Wong <e@80x24.org>
To: Philip Cunningham <philip@irisconnect.co.uk>
Cc: unicorn-public@bogomips.org
Subject: Re: `hash' called on unexpected T_NODE object
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Philip Cunningham <philip@irisconnect.co.uk> wrote:
> We recently experienced an issue with our staging server on Heroku.
> It's the first time we've seen this error and the staging server
> hasn't been updated in a week or so. It's not clear to me how I should
> investigate this further so I would appreciate any assistance you
> might offer. Some details are below:

> ``` ruby version
> ruby 2.0.0p481 (2014-05-08 revision 45883) [x86_64-linux]
> ```
> 
> ``` log
> 2014-07-22T14:47:34.306596+00:00 app[web.2]: /app/vendor/bundle/ruby/2.0.0/gems/unicorn-4.8.2/lib/unicorn/http_request.rb:80:in `parse': method `hash' called on unexpected T_NODE object (0x007fa3c36823d8 flags=0x33b21c) (NotImplementedError)

This is either a version mismatch from objects of different Ruby versions
or memory corruption caused by a C extension.  Since your install
hasn't been touched in a week, I suspect a buggy C extension.

Can you share a list of C extensions, in particular less popular/used
ones so others may have a look and see if there's any known issues?

Just in case, can you ensure you're not carrying around any .so files
between different Ruby versions/installations?

Thanks.