show errno on FiberError ref #8711

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42270 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* lib/uri/common.rb (URI.decode_www_form_component):
  Don't raise error when str includes multibyte characters.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42271 b2dd03c8-39d4-4d8f-98ff-823fe69b080e