Ruby » Ruby master

• test/ruby/test_io.rb (test_advise_pipe): new test to check
  io.advise() against anonymous io object don't make crash.
  made by Eric Wong. [Bug #6081] [ruby-core:42880]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36933 b2dd03c8-39d4-4d8f-98ff-823fe69b080e