changes in sbcl-0.8.1 relative to sbcl-0.8.0:
* fixed bug 148: failure to inline-expand a local function left
garbage, confusing the compiler.
+ * fixed bugs 3cd: structure slot readers perform type check if the
+ slot can have an invalid value (i.e. it is either not initialized
+ or can be written with a less specific slot writer).
planned incompatible changes in 0.8.x:
* (not done yet, but planned:) When the profiling interface settles