proc.c: proc without block

* proc.c (proc_new): promoted lambda/proc/Proc.new with no block
  in a method called with a block to a warning/error.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66772 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/prime.rb b/lib/prime.rb
index 9f6db448be..3aa20f8def 100644
--- a/lib/prime.rb
+++ b/lib/prime.rb
@@ -283,9 +283,9 @@ class Prime
     end
 
     # see +Enumerator+#with_index.
-    def with_index(offset = 0)
-      return enum_for(:with_index, offset) { Float::INFINITY } unless block_given?
-      return each_with_index(&proc) if offset == 0
+    def with_index(offset = 0, &block)
+      return enum_for(:with_index, offset) { Float::INFINITY } unless block
+      return each_with_index(&block) if offset == 0
 
       each do |prime|
         yield prime, offset