Rake “already initialized constant WFKV_” warning

Question

Trying to run rake cucumber:ok and am getting this error:

/Users/dev/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/rack-1.3.4/lib/rack/backp

Answer 1

I started having the same problem this evening. It seems to be related to Rack 1.3.4. I fixed it by adding this to my Gemfile:

gem 'rack', '1.3.3'

Then running:

bundle update rack

Incidentally, I tried Bozhidar's suggestion before this, but to no avail.