update.freebsd.org does not include
FTP site includes tar files for the base system.
freebsd-update outputs the following:
Fetching metadata signature for 10.1-RC4 from update6.freebsd.org... failed.
Fetching metadata signature for 10.1-RC4 from update4.freebsd.org... failed.
Fetching metadata signature for 10.1-RC4 from update5.freebsd.org... failed.
Fetching metadata signature for 10.1-RC4 from update2.freebsd.org... failed.
Fetching metadata signature for 10.1-RC4 from update3.freebsd.org... failed.
No mirrors remaining, giving up.
Though this report most likely doesn't belong here, I'm not certain where else to file it. Sorry 'bout that.
There are no announce for -RC4 on official site. Why do you want to upgrade to version that isn't currently listed?
"RC4 builds begin * 29 October 2014 30 October 2014 Fourth release candidate."
would indicate it's ready for consumption, plus the files are available off the ftp server.
Both make it "officialish" for me.
I've submitted a couple of vt terminal issues and was intending to test them against RC4. If they continue to be an issue, I intended to update them.
Why now? Well, it's easier to do an upgrade on Saturday and Sunday than during the week.
Build begins != build finished, I think this is problem.
(In reply to Anton Sayetsky from comment #3)
> Build begins != build finished, I think this is problem.
And announce is finally here: http://lists.freebsd.org/pipermail/freebsd-stable/2014-November/080872.html
So you can try to update again and if this succeeds - PR should be closed.
The bits are all in their places.