xristos xristos@suspicious.org writes:

swank-fancy-inspector.lisp:459

"Prototype: " ,(if (swank-mop:class-finalized-p class) `(:value ,(swank-mop:class-prototype class)) '"#<N/A (class not finalized)>")

class-prototype will fill prototype slot of class instance with a prototype instance.

This will raise unbound-slot conditions for classes that have print-object that accesses slots specialized on them, since the instance returned by class-prototype may or may not be initialized according to spec.

Also see: http://paste.lisp.org/display/88827

The same conditions are raised in ccl although ccl has the with-errorfree-printing macro that slime could use to deal with this.

I committed something on that line. Thank you for the report,

-T.