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phoe
2020.09.16 20:11:25
* (defclass a () ()) #<STANDARD-CLASS COMMON-LISP-USER::A> * (defclass b (a a) ()) debugger invoked on a SIMPLE-ERROR in thread #<THREAD "main thread" RUNNING {10008A8083}>: While computing the class precedence list of the class named COMMON-LISP-USER::B. It is not possible to compute the class precedence list because there is a circularity in the local precedence relations. This arises because: The class named COMMON-LISP-USER::A follows the class named COMMON-LISP-USER::A in the supers of the class named COMMON-LISP-USER::B.. Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL. restarts (invokable by number or by possibly-abbreviated name): 0: [ABORT] Exit debugger, returning to top level. (SB-PCL::CPL-ERROR #<STANDARD-CLASS COMMON-LISP-USER::B {100319A013}> "It is not possible to compute the class precedence list because~@ there ~A in the local precedence relations.~@ ~A because:~{~% ~A~}." "is a circularity" "This arises" ("The class named COMMON-LISP-USER::A follows the class named COMMON-LISP-USER::A in the supers of the class named COMMON-LISP-USER::B."))
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