16:50:16karloszspecifically 2e8488e0ace2d21a3d7af217037bcb445cc93496 of cmucl fixes emitting return-multiple for no reason and improves values type handling
16:50:30karloszi don't understand our cast machinery enough to port it to our current framework though
19:18:56|3b|hmm, sbcl can't figure out that (rational (the fixnum x)) returns a fixnum? (or similarly for other integral types)