Ruby » Ruby master

merge revision(s) 45066: [Backport #9545] [Backport #9550]

    * ext/socket/ancdata.c (bsock_sendmsg_internal): only retry on error
      (bsock_recvmsg_internal): ditto

    * test/socket/test_unix.rb: test above for infinite loop

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@45120 b2dd03c8-39d4-4d8f-98ff-823fe69b080e