error.c: check argument of Warning.warn

* error.c (rb_warning_s_warn): the argument must be an
  ASCII-compatible string.  [ruby-core:77430] [Bug #12793]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56274 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 0 deletions

diff --git a/test/ruby/test_exception.rb b/test/ruby/test_exception.rb
index 3735e492d8..91d3ac1e93 100644
--- a/test/ruby/test_exception.rb
+++ b/test/ruby/test_exception.rb
@@ -940,4 +940,16 @@ $stderr = $stdout; raise "\x82\xa0"') do |outs, errs, status|
       remove_method :warn2
     end
   end
+
+  def test_warning_warn_invalid_argument
+    assert_raise(TypeError) do
+      ::Warning.warn nil
+    end
+    assert_raise(TypeError) do
+      ::Warning.warn 1
+    end
+    assert_raise(Encoding::CompatibilityError) do
+      ::Warning.warn "\x00a\x00b\x00c".force_encoding("utf-16be")
+    end
+  end
 end