I built a new release of my tiny blogging engine (which
works locally just fine), pushed it to RubyGems and pinned
my blog to use it, but when I try to push my blog to Heroku
it seems to trip on the Psych-based Gemspec:

-----> Heroku receiving push
-----> Rack app detected

-----> Installing gem tributary 0.0.2 from http://rubygems.org
       ERROR:  While executing gem ... (Gem::Exception)
           ruby_code case not handled: Syck::PrivateType
 !     Heroku push rejected, failed to install gem

BTW: It also seems that RubyGems doesn’t like to parse
Psych-generated Gemspecs with Syck as well – look at the
description of https://rubygems.org/gems/tributary/versions/0.0.2

As I mentioned above, the gem works just fine for me locally.

Is there a way to either make Heroku use Psych to parse the Gemfile
or tell `gem build` to use Syck (I’m on RVM-based Ruby 1.9.2-p180)?

— Piotr Szotkowski
-- 
Founding member of the Hyphenation Society, a grassroots-based,
not-for-profit, locally-owned-and-operated, cooperatively-managed,
modern-American-English-usage-improvement association.
                                                       [Rick Moen]



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