1 files changed, 14 insertions, 9 deletions
diff --git a/lib/rake/task.rb b/lib/rake/task.rb
index 5e4dd64d4e..9bcf725523 100644
--- a/lib/rake/task.rb
+++ b/lib/rake/task.rb
@@ -2,7 +2,7 @@ require 'rake/invocation_exception_mixin'
 
 module Rake
 
-  # #########################################################################
+  ##
   # A Task is the basic unit of work in a Rakefile.  Tasks have associated
   # actions (possibly more than one) and a list of prerequisites.  When
   # invoked, a task will first ensure that all of its prerequisites have an
@@ -34,14 +34,18 @@ module Rake
       name
     end
 
-    def inspect
+    def inspect # :nodoc:
       "<#{self.class} #{name} => [#{prerequisites.join(', ')}]>"
     end
 
     # List of sources for task.
     attr_writer :sources
     def sources
-      @sources ||= []
+      if defined?(@sources)
+        @sources
+      else
+        prerequisites
+      end
     end
 
     # List of prerequisite tasks
@@ -49,7 +53,7 @@ module Rake
       prerequisites.map { |pre| lookup_prerequisite(pre) }
     end
 
-    def lookup_prerequisite(prerequisite_name)
+    def lookup_prerequisite(prerequisite_name) # :nodoc:
       application[prerequisite_name, @scope]
     end
     private :lookup_prerequisite
@@ -63,7 +67,7 @@ module Rake
       seen.values
     end
 
-    def collect_prerequisites(seen)
+    def collect_prerequisites(seen) # :nodoc:
       prerequisite_tasks.each do |pre|
         next if seen[pre.name]
         seen[pre.name] = pre
@@ -74,7 +78,7 @@ module Rake
 
     # First source from a rule (nil if no sources)
     def source
-      @sources.first if defined?(@sources)
+      sources.first
     end
 
     # Create a task named +task_name+ with no actions or prerequisites. Use
@@ -180,7 +184,7 @@ module Rake
     end
     protected :invoke_with_call_chain
 
-    def add_chain_to(exception, new_chain)
+    def add_chain_to(exception, new_chain) # :nodoc:
       exception.extend(InvocationExceptionMixin) unless
         exception.respond_to?(:chain)
       exception.chain = new_chain if exception.chain.nil?
@@ -257,11 +261,12 @@ module Rake
       add_comment(comment) if comment && ! comment.empty?
     end
 
-    def comment=(comment)
+    def comment=(comment) # :nodoc:
       add_comment(comment)
     end
 
-    def add_comment(comment)
+    def add_comment(comment) # :nodoc:
+      return if comment.nil?
       @comments << comment unless @comments.include?(comment)
     end
     private :add_comment