[Outdated] Fixed crash.

Closes 568.

CHANGELOG.md

@@ -9,6 +9,8 @@
   [#568](https://github.com/CocoaPods/CocoaPods/issues/568)
 - Fixed a crash related to the RubyGems version informative.
   [#570](https://github.com/CocoaPods/CocoaPods/issues/570)
+- Fixed a crash for `pod outdated`.
+  [#567](https://github.com/CocoaPods/CocoaPods/issues/567)
 
 ## 0.15.0
 

lib/cocoapods/command/outdated.rb

@@ -22,7 +22,6 @@ module Pod
       def run
         verify_podfile_exists!
         verify_lockfile_exists!
-        update_spec_repos_if_necessary!
 
         sandbox = Sandbox.new(config.project_pods_root)
         resolver = Resolver.new(config.podfile, config.lockfile, sandbox)
@@ -30,6 +29,9 @@ module Pod
         resolver.update_external_specs = false
         resolver.resolve
 
+        #TODO: the command report new dependencies (added to by updated ones)
+        # as updates.
+
         names = resolver.pods_to_install - resolver.pods_from_external_sources
         specs = resolver.specs.select do |spec|
           names.include?(spec.name) && !spec.version.head?