* object.c (rb_inspect): raise the result is not compatible with

  the default external encoding. [ruby-core:42095] [Bug #5848]
  If the default external encoding is ASCII compatible, the encoding of
  inspected result must be compatible with it.
  If the default external encoding is ASCII incomapatible,
  the result must be ASCII only.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34308 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 28 insertions, 0 deletions

diff --git a/test/ruby/test_m17n.rb b/test/ruby/test_m17n.rb
index 7c261138ba..3bfb540b13 100644
--- a/test/ruby/test_m17n.rb
+++ b/test/ruby/test_m17n.rb
@@ -271,6 +271,34 @@ class TestM17N < Test::Unit::TestCase
     Encoding.default_external = orig_ext
   end
 
+  def test_object_inspect_external
+    orig_v, $VERBOSE = $VERBOSE, false
+    orig_int, Encoding.default_internal = Encoding.default_internal, nil
+    orig_ext = Encoding.default_external
+    o = Object.new
+
+    Encoding.default_external = Encoding::UTF_16BE
+    def o.inspect
+      "abc"
+    end
+    assert_nothing_raised(Encoding::CompatibilityError) { [o].inspect }
+
+    def o.inspect
+      "abc".encode(Encoding.default_external)
+    end
+    assert_raise(Encoding::CompatibilityError) { [o].inspect }
+
+    Encoding.default_external = Encoding::US_ASCII
+    def o.inspect
+      "\u3042"
+    end
+    assert_raise(Encoding::CompatibilityError) { [o].inspect }
+  ensure
+    Encoding.default_internal = orig_int
+    Encoding.default_external = orig_ext
+    $VERBOSE = orig_v
+  end
+
   def test_str_dump
     [
       e("\xfe"),