* io.c (rb_io_ctl): do not call ioctl/fcntl for f2, if f and f2

  have same fileno.

* eval.c (rb_load): raise LocaJumpError if unexpected local jumps
  appear during load.

* ext/socket/socket.c (bsock_close_read): don't call rb_thread_fd_close();
  it's supposed to be called by io_io_close().

* ext/socket/socket.c (bsock_close_read): do not modify f and f2.

* ext/socket/socket.c (bsock_close_write): ditto.

* ext/socket/socket.c (sock_new): avoid dup(2) on sockets.

* parse.y (primary): preserve and clear in_single and in_def using
  stack to prevent nested method errors in singleton class bodies.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1177 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

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