encoding.c: preserve outer errinfo

* encoding.c (load_encoding): should preserve outer errinfo, so that
  expected exception may not be lost.  [ruby-core:57949] [Bug #9038]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43376 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 0 deletions

diff --git a/test/ruby/test_encoding.rb b/test/ruby/test_encoding.rb
index c1ded6c741..0a5a9ce197 100644
--- a/test/ruby/test_encoding.rb
+++ b/test/ruby/test_encoding.rb
@@ -108,4 +108,13 @@ class TestEncoding < Test::Unit::TestCase
     asc = "b".force_encoding(Encoding::US_ASCII)
     assert_equal(Encoding::ASCII_8BIT, Encoding.compatible?(bin, asc))
   end
+
+  def test_errinfo_after_autoload
+    bug9038 = '[ruby-core:57949] [Bug #9038]'
+    assert_separately(%w[--disable=gems], <<-"end;")
+      assert_raise_with_message(SyntaxError, /unknown regexp option - Q/, #{bug9038.dump}) {
+        eval("/regexp/sQ")
+      }
+    end;
+  end
 end