* lib/set.rb (Set#replace): Check if an object given is enumerable

  before clearing self.  Reported by yui-knk. [GH-675]
  https://github.com/ruby/ruby/pull/675

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47085 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/test/test_set.rb b/test/test_set.rb
index 169136f0d9..961578b696 100644
--- a/test/test_set.rb
+++ b/test/test_set.rb
@@ -98,6 +98,12 @@ class TC_Set < Test::Unit::TestCase
 
     assert_same(set, ret)
     assert_equal(Set['a','b','c'], set)
+
+    set = Set[1,2]
+    assert_raise(ArgumentError) {
+      set.replace(3)
+    }
+    assert_equal(Set[1,2], set)
   end
 
   def test_to_a