Test :NAN-COMPARISONS in float.pure.lisp fails on x86-64, and has been
disabled on those platforms. Since x86 does not exhibit any problems
the problem is probably with the new FP implementation.
+
+412: deletion of global variable references in safe code
+ The following returns 1 instead of signalling an error.
+ (funcall (compile nil
+ '(lambda ()
+ (declare (optimize (safety 3)))
+ #:unbound
+ 42)))
+ Reported by Marco Monteiro on sbcl-devel.