+ This implementation is not as polished and painless as you might like:
+ * It corrupts the current Lisp image enough that the current process
+ needs to be killed afterwards.
+ * There is absolutely no binary compatibility of core images between
+ different runtime support programs. Even runtimes built from the same
+ sources at different times are treated as incompatible for this purpose.
+ This isn't because we like it this way, but just because there don't
+ seem to be good quick fixes for either limitation and no one has been
+ sufficiently motivated to do lengthy fixes.
+
+ The following &KEY arguments are defined: