Basically, the breakpoint facility wasn incompletely implemented
in the X86 port of CMU CL, and we haven't fixed it in SBCL.
+97:
+ FRESH-LINE doesn't seem to work properly within pretty-printed
+ output. E.g.
+ "~@<unhandled CONDITION (of type ~S): ~2I~_~A~:>~2%"
+ called on a CONDITION whose printer does
+ "~&~@<error in function ~S: ~3I~:_~?~:>"
+ gives two newlines between "unhandled CONDITION" and "error", when
+ (it at least seems as though) correct behavior would be to give one.
+
+
KNOWN BUGS RELATED TO THE IR1 INTERPRETER
(Note: At some point, the pure interpreter (actually a semi-pure