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

2 files changed, 4 insertions, 5 deletions

diff --git a/lib/matrix.rb b/lib/matrix.rb
index 7f338bb07e..34602f5c40 100644
--- a/lib/matrix.rb
+++ b/lib/matrix.rb
@@ -514,12 +514,11 @@ class Matrix
   #     # => prints the numbers 1 to 4
   #   Matrix[ [1,2], [3,4] ].each(:strict_lower).to_a # => [3]
   #
-  def each(which = :all) # :yield: e
+  def each(which = :all, &block) # :yield: e
     return to_enum :each, which unless block_given?
     last = column_count - 1
     case which
     when :all
-      block = Proc.new
       @rows.each do |row|
         row.each(&block)
       end
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