AVLMap does not implement isEmpty for java.util.Map

Question

The clojure.data.avl AVLMap does not have an implementation for the isEmpty method of the java.util.Map interface.

The cider debugger calls isEmpty on instances of java.util.Map when printing values while stepping through execution. If the value is an AVLMap, this throws an AbstractMethodError that prevents the debugger from working (see the stacktrace below).

I have a workaround, which is to use a :local/root version of clojure.data.avl with isEmpty implemented.

I have not checked if this problem exists on the CLJS implementation.

I am on Clojure 1.12.4 and clojure.data.avl 0.2.1.

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1. Unhandled java.lang.AbstractMethodError
   Method clojure/data/avl/AVLMap.isEmpty()Z is abstract

               avl.clj:   -1  clojure.data.avl.AVLMap/isEmpty
             print.clj:  166  orchard.print/print-map
             print.clj:  165  orchard.print/print-map
             print.clj:  174  orchard.print/eval46055/fn
          MultiFn.java:  234  clojure.lang.MultiFn/invoke
             print.clj:  301  orchard.print/print-str/fn
             print.clj:  301  orchard.print/print-str
             print.clj:  295  orchard.print/print-str
             debug.clj:  195  cider.nrepl.middleware.debug/pr-short
             debug.clj:  183  cider.nrepl.middleware.debug/pr-short
              core.clj: 7059  clojure.core/mapv/fn
         protocols.clj:   42  clojure.core.protocols/iterator-reduce!
         protocols.clj:   52  clojure.core.protocols/iter-reduce
         protocols.clj:   74  clojure.core.protocols/fn
         protocols.clj:   74  clojure.core.protocols/fn
         protocols.clj:   13  clojure.core.protocols/fn/G
              core.clj: 6965  clojure.core/reduce
              core.clj: 7050  clojure.core/mapv
              core.clj: 7050  clojure.core/mapv
              core.clj: 2641  clojure.core/partial/fn
              core.clj: 7059  clojure.core/mapv/fn
         protocols.clj:   42  clojure.core.protocols/iterator-reduce!
         protocols.clj:   52  clojure.core.protocols/iter-reduce
         protocols.clj:   74  clojure.core.protocols/fn
         protocols.clj:   74  clojure.core.protocols/fn
         protocols.clj:   13  clojure.core.protocols/fn/G
              core.clj: 6965  clojure.core/reduce
              core.clj: 7050  clojure.core/mapv
              core.clj: 7050  clojure.core/mapv
             debug.clj:  200  cider.nrepl.middleware.debug/locals-for-message
             debug.clj:  197  cider.nrepl.middleware.debug/locals-for-message
              core.clj: 6259  clojure.core/update
              core.clj: 6251  clojure.core/update
             debug.clj:  244  cider.nrepl.middleware.debug/read-debug-input
             debug.clj:  233  cider.nrepl.middleware.debug/read-debug-input
             debug.clj:  356  cider.nrepl.middleware.debug/read-debug-command
             debug.clj:  322  cider.nrepl.middleware.debug/read-debug-command
             debug.clj:  557  cider.nrepl.middleware.debug/break
             debug.clj:  535  cider.nrepl.middleware.debug/break
              Var.java:  401  clojure.lang.Var/invoke
     DebugSupport.java:   23  cider.nrepl.middleware.DebugSupport/doBreak
                  REPL:  749  fredb.index.storage/eval82032/materialize
                  REPL:  767  fredb.index.storage/eval82041
                  REPL:  767  fredb.index.storage/eval82041
         Compiler.java: 7757  clojure.lang.Compiler/eval
   

   interruptible_eval.clj: 106 nrepl.middleware.interruptible-eval/evaluator/run/fn
   interruptible_eval.clj: 101 nrepl.middleware.interruptible-eval/evaluator/run

           session.clj:  251  nrepl.middleware.session/session-exec/session-loop
    SessionThread.java:   21  nrepl.SessionThread/run