When launching Guard, I'm getting this output:
WARN: Unresolved specs during Gem::Specification.reset:
lumberjack (>= 1.0.2)
ffi (>= 0.5.0)
WARN: Clearing out unresolved specs.
Please report a bug if this causes problems.
guard 'livereload' do
guard 'sass', :input => 'css', :style => :compressed, :extension => '.min.css'
I was seeing this issue by just running RSpec on its own. From what I understand, this means that you have more than one version of the listed gems installed on your system, and RSpec is unsure which to use. After uninstalling older version of the gems, the warnings went away.
You can try...
gem cleanup lumberjack
gem list lumberjack
If you're using Bundler, you can try
bundle exec guard (or in my case
bundle exec rspec).