lib/rubygems/resolver.rb in rubygems-update-3.0.6 vs lib/rubygems/resolver.rb in rubygems-update-3.0.7

@@ -122,10 +122,13 @@
   def explain_list(stage) # :nodoc:
     return unless DEBUG_RESOLVER
 
     data = yield
     $stderr.printf "%10s (%d entries)\n", stage.to_s.upcase, data.size
-    PP.pp data, $stderr unless data.empty?
+    unless data.empty?
+      require 'pp'
+      PP.pp data, $stderr
+    end
   end
 
   ##
   # Creates an ActivationRequest for the given +dep+ and the last +possible+
   # specification.