if the derived type of the second argument is a MEMBER type
containing invalid type specifiers.
** ADJOIN with constant NIL as second argument works correctly.
+ ** FUNCTION-KEYWORDS was called SB-PCL::FUNCTION-KEYWORD-PARAMETERS.
changes in sbcl-1.0.18 relative to 1.0.17:
* minor incompatible change: SB-SPROF:WITH-PROFILING now by default