id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,difficulty 304,coops#subclass? can process abort,Kon Lovett,felix winkelmann,"(use coops) (subclass? 'not-a-class! ) ;=> Bus error (MacOS 10.5) The `c1' argument is interpreted as a class w/o determining the safety. Maybe: ((memq c2 (slot-value c1 'class-precedence-list)) #t) => ((and (coops-instance? c1) (memq c2 (slot-value c1 'class-precedence-list))) #t) ",defect,closed,critical,,extensions,4.5.x,fixed,coops,,