* ext/psych/parser.c: fall back to any encoding if the external

  encoding is wrong.  [ruby-core:44163]
* test/psych/test_encoding.rb: fix test

CHANGELOG.rdoc

@@ -1,3 +1,9 @@
+Sat Apr  7 02:07:00 2012  Aaron Patterson <[email protected]>
+
+	* ext/psych/parser.c: fall back to any encoding if the external
+	  encoding is wrong.  [ruby-core:44163]
+	* test/psych/test_encoding.rb: fix test
+
 Fri Mar  9 06:29:22 2012  Aaron Patterson <[email protected]>
 
 	* ext/psych/lib/psych.rb (load, parse): stop parsing or loading after

ext/psych/parser.c

@@ -146,10 +146,11 @@ static VALUE transcode_io(VALUE src, int * parser_encoding)
 	return src;
     }
 
-    rb_raise(rb_eArgError, "YAML file must be UTF-8, UTF-16LE, or UTF-16BE, not %s",
-	    rb_enc_name(rb_enc_from_index(io_external_enc_index)));
+    /* If the external encoding is something we don't know how to handle,
+     * fall back to YAML_ANY_ENCODING. */
+    *parser_encoding = YAML_ANY_ENCODING;
 
-    return Qnil;
+    return src;
 }
 
 #endif

test/psych/test_encoding.rb

@@ -57,7 +57,7 @@ def test_io_shiftjis
       # If the external encoding isn't utf8, utf16le, or utf16be, we cannot
       # process the file.
       File.open(t.path, 'r', :encoding => 'SHIFT_JIS') do |f|
-        assert_raises ArgumentError do
+        assert_raises Psych::SyntaxError do
           Psych.load(f)
         end
       end