A couple of weeks ago, SBCL 1.2.1 came out and as I reported at the time, although it compiled and installed correctly, there was a problem with Slime. The 1.2.1 SBCL release changed some internals that Slime relied on and as a consequence Slime wouldn’t compile.
Now Xach has released this month’s Quicklisp distribution with a new version of Slime that fixes the problem. I reinstalled SBCL 1.2.1, fired it up, and everything was fine. If you had the same problem, it’s now safe to install the latest SBCL. If for some inexplicable reason you’re not using Quicklisp, just grab the new slime from GitHub.
Even if you didn’t have the problem, it’s worth noting that the new Quicklisp distribution is available. As usual, there is lots of goodness in it.