The problem is on json, not vagrant. And the solution is simple:
1) RubyInstaller (guess you already have it)
2) DevKit from downloads (4.5.0) and install with the following instructions:
http://github.com/oneclick/rubyinstaller/wiki/Development-Kit
3) Remove any existing json:
gem uninstall json json_pure --all
4) Force compilation:
gem install json --platform=ruby
That should do it.
I've complained on this in the past and provided all the building
blocks to flori (author of json gem) but he is not responsive.
--
Luis Lavena
AREA 17
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Perfection in design is achieved not when there is nothing more to add,
but rather when there is nothing more to take away.
Antoine de Saint-Exupéry