* parse.y (warn_unused_var): warn unused variables.

  [ruby-dev:41620]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28339 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/test/ruby/test_rubyoptions.rb b/test/ruby/test_rubyoptions.rb
index 683677c160..b219e43663 100644
--- a/test/ruby/test_rubyoptions.rb
+++ b/test/ruby/test_rubyoptions.rb
@@ -415,4 +415,10 @@ class TestRubyOptions < Test::Unit::TestCase
   ensure
     t.close(true) if t
   end
+
+  def test_unused_variable
+    feature3446 = '[ruby-dev:41620]'
+    assert_in_out_err(["-we", "a=1"], "", [], ["-e:1: warning: assigned but unused variable a"], feature3446)
+    assert_in_out_err(["-we", "1.times do\n  a=1\nend"], "", [], ["-e:2: warning: assigned but unused variable a"], feature3446)
+  end
 end