transcode.c: infection

* transcode.c (rb_econv_substr_append, econv_primitive_convert):
  the result should be infected by the original string.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53168 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/test/ruby/test_econv.rb b/test/ruby/test_econv.rb
index 8172bf99ef..6f098db454 100644
--- a/test/ruby/test_econv.rb
+++ b/test/ruby/test_econv.rb
@@ -680,6 +680,7 @@ class TestEncodingConverter < Test::Unit::TestCase
     ec = Encoding::Converter.new("utf-8", "euc-jp")
     assert_raise(Encoding::InvalidByteSequenceError) { ec.convert("a\x80") }
     assert_raise(Encoding::UndefinedConversionError) { ec.convert("\ufffd") }
+    assert_predicate(ec.convert("abc".taint), :tainted?)
     ret = ec.primitive_convert(nil, "", nil, nil)
     assert_equal(:finished, ret)
     assert_raise(ArgumentError) { ec.convert("a") }