* parse.y (rb_intern3): non ASCII compatible symbols.

* re.c (rb_reg_regsub): add encoding check.

* string.c (rb_str_chomp_bang): ditto.

* test/ruby/test_utf16.rb (TestUTF16::test_chomp): raises exception.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15640 b2dd03c8-39d4-4d8f-98ff-823fe69b080e