cl-user> (quick-update)
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You already have the latest version of "quicklisp": 2018-10-18.
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cl-user> (asdf:find-system :iolib)



Error while trying to load definition for system #1=iolib from
pathname
/Users/pjb/quicklisp/dists/quicklisp/software/iolib-v0.8.1/iolib.asd:

   Circular dependency:
      ((#<DEFINE-OP> . #<UNDEFINED-SYSTEM #1#>)
       (#2=#<LOAD-OP> . #6=#<SYSTEM #3="iolib/asdf">)
       (#2# . #4=#<CL-SOURCE-FILE #3# "asdf">)
       (#5=#<PREPARE-OP> . #4#) (#5# . #6#))
   [Condition of type ASDF/FIND-SYSTEM:LOAD-SYSTEM-DEFINITION-ERROR]

Restarts:
 0: [RETRY-LOAD] Retry loading #P"/Users/pjb/quicklisp/dists/quicklisp/software/iolib-v0.8.1/iolib.asd"
 1: [SKIP-LOAD] Skip loading #P"/Users/pjb/quicklisp/dists/quicklisp/software/iolib-v0.8.1/iolib.asd"
 2: [LOAD-OTHER] Load other file instead of #P"/Users/pjb/quicklisp/dists/quicklisp/software/iolib-v0.8.1/iolib.asd"
 3: [RETRY] Retry #<DEFINE-OP> on #<UNDEFINED-SYSTEM "iolib">.
 4: [ACCEPT] Continue, treating #<DEFINE-OP> on #<UNDEFINED-SYSTEM "iolib"> as having been successful.
 5: [RETRY] Retry ASDF operation.
 --more--

Backtrace:
  0: ((:internal (asdf/action:perform (asdf/find-system:define-op asdf/system:system))) #<asdf/action:circular-dependency #x3..
  1: (signal #<asdf/action:circular-dependency #x3020065291BD>)
  2: (ccl::%error #<asdf/action:circular-dependency #x3020065291BD> (:actions ((#<define-op> . #<undefined-system "iolib">) (..
  3: ((:internal asdf/action:call-while-visiting-action))
  4: (asdf/plan:traverse-action #<asdf/plan:sequential-plan #x30200652932D> #<define-op> #<undefined-system "iolib"> t)
  5: ((:internal (asdf/plan:make-plan (t asdf/operation:operation asdf/component:component))))
  6: (#<standard-method asdf/operate:operate (asdf/operation:operation asdf/component:component)> #<define-op> #<undefined-sy..
  7: (ccl::%call-next-method ((nil) #<standard-method asdf/operate:operate (asdf/operation:operation asdf/component:component..
  8: ((:internal (asdf/operate:operate :around (t t))))
  9: (#<standard-method asdf/operate:operate :around (t t)> ((nil) #<standard-method asdf/operate:operate (asdf/operation:ope..
 10: (ccl::%%standard-combined-method-dcode (#<standard-method asdf/operate:operate :around (t t)> (#<standard-method asdf/op..
 11: (nil #<Unknown Arguments>)
 12: ((:internal (asdf/system:find-system (string))))
 13: (asdf/session:consult-asdf-cache (asdf/system:find-system "iolib") #<ccl:compiled-lexical-closure (:internal (asdf/syste..
 14: (#<standard-method asdf/component:find-component (string t)> "iolib" nil :registered nil)
 15: (ccl::%%check-keywords #(2 #(:registered) #<ccl:method-function asdf/component:find-component (string t)>) 83320902)
 16: (nil #<Unknown Arguments>)
 17: (ccl::%%check-keywords #(2 #(:registered) #<ccl:method-function asdf/component:find-component (symbol t)>) 83320916)
 18: (nil #<Unknown Arguments>)
 19: (asdf/find-component:resolve-dependency-name #<system "iolib/asdf"> "iolib" nil)
 20: (asdf/plan:map-direct-dependencies #<prepare-op> #<system "iolib/asdf"> #<ccl:compiled-lexical-closure (:internal asdf/p..
 21: ((:internal asdf/plan::visit-action asdf/plan:traverse-action) t)
 22: ((:internal asdf/action:call-while-visiting-action))
 23: (asdf/plan:traverse-action #<asdf/plan:sequential-plan #x30200647DA5D> #<prepare-op> #<system "iolib/asdf"> t)
 24: (asdf/plan:map-direct-dependencies #<prepare-op> #<cl-source-file "iolib/asdf" "asdf"> #<ccl:compiled-lexical-closure (:..
 25: ((:internal asdf/plan::visit-action asdf/plan:traverse-action) t)
 26: ((:internal asdf/action:call-while-visiting-action))
 27: (asdf/plan:traverse-action #<asdf/plan:sequential-plan #x30200647DA5D> #<prepare-op> #<cl-source-file "iolib/asdf" "asdf..
 28: (asdf/plan:map-direct-dependencies #<load-op> #<cl-source-file "iolib/asdf" "asdf"> #<ccl:compiled-lexical-closure (:int..
 29: ((:internal asdf/plan::visit-action asdf/plan:traverse-action) t)
 30: ((:internal asdf/action:call-while-visiting-action))
 31: (asdf/plan:traverse-action #<asdf/plan:sequential-plan #x30200647DA5D> #<load-op> #<cl-source-file "iolib/asdf" "asdf"> ..
 32: (asdf/plan:map-direct-dependencies #<load-op> #<system "iolib/asdf"> #<ccl:compiled-lexical-closure (:internal asdf/plan..
 33: ((:internal asdf/plan::visit-action asdf/plan:traverse-action) t)
 34: ((:internal asdf/action:call-while-visiting-action))
 35: (asdf/plan:traverse-action #<asdf/plan:sequential-plan #x30200647DA5D> #<load-op> #<system "iolib/asdf"> t)
 36: ((:internal (asdf/plan:make-plan (t asdf/operation:operation asdf/component:component))))
 37: (#<standard-method asdf/operate:operate (asdf/operation:operation asdf/component:component)> #<load-op> #<system "iolib/..
 38: (ccl::%call-next-method ((nil) #<standard-method asdf/operate:operate (asdf/operation:operation asdf/component:component..
 39: ((:internal (asdf/operate:operate :around (t t))))
 40: (#<standard-method asdf/operate:operate :around (t t)> ((nil) #<standard-method asdf/operate:operate (asdf/operation:ope..
 41: (ccl::%%standard-combined-method-dcode (#<standard-method asdf/operate:operate :around (t t)> (#<standard-method asdf/op..
 42: (nil #<Unknown Arguments>)
 43: (ccl::%call-next-method ((nil) #<standard-method asdf/operate:operate (symbol t)> asdf/lisp-action:load-op #<system "iol..
 44: ((:internal (asdf/operate:operate :around (t t))))
 45: (#<standard-method asdf/operate:operate :around (t t)> ((nil) #<standard-method asdf/operate:operate (symbol t)> asdf/li..
 46: (ccl::%%standard-combined-method-dcode (#<standard-method asdf/operate:operate :around (t t)> (#<standard-method asdf/op..
 47: (nil #<Unknown Arguments>)
 48: (asdf/operate:load-system #<system "iolib/asdf">)
 49: (asdf/operate:load-systems* (#<system "iolib/asdf">))
 50: ((:internal asdf/parse-defsystem:register-system-definition))
 51: (apply asdf/parse-defsystem:register-system-definition :iolib/conf (:description "Compile-time configuration for IOLib."..
 52: (ccl::call-check-regs apply asdf/parse-defsystem:register-system-definition :iolib/conf (:description "Compile-time conf..
 53: ((:internal ccl::with-compilation-unit-body ccl::load-from-stream))
 54: (ccl::call-with-compilation-unit #<ccl:compiled-lexical-closure (:internal ccl::with-compilation-unit-body ccl::load-fro..
 55: (ccl::load-from-stream #<basic-file-character-input-stream ("/Users/pjb/quicklisp/dists/quicklisp/software/iolib-v0.8.1/..
 56: (ccl::%load #P"/Users/pjb/quicklisp/dists/quicklisp/software/iolib-v0.8.1/iolib.asd" nil nil :error :utf-8 nil)
 57: (load #P"/Users/pjb/quicklisp/dists/quicklisp/software/iolib-v0.8.1/iolib.asd" :verbose nil :print nil :if-does-not-exis..
 58: (uiop/utility:call-with-muffled-conditions #<ccl:compiled-lexical-closure (:internal uiop/lisp-build:load*) #x302006478C..
 59: (#<standard-method asdf/action:perform (asdf/find-system:define-op asdf/system:system)> #<define-op> #<undefined-system ..
 60: (ccl::%%before-and-after-combined-method-dcode ((nil) #<standard-method asdf/action:perform (asdf/find-system:define-op ..
 61: (ccl::%call-next-method ((nil) #<standard-method asdf/action:perform (asdf/find-system:define-op asdf/system:system)> #<..
 62: ((:internal asdf/action:call-while-visiting-action))
 63: (ccl::%%standard-combined-method-dcode (#<standard-method asdf/action:perform :around (asdf/operation:operation asdf/com..
 64: (nil #<Unknown Arguments>)
 65: (ccl::%call-next-method (nil #<standard-method asdf/action:perform-with-restarts (t t)> . 83321637))
 66: (#<standard-method asdf/action:perform-with-restarts :around (t t)> #<define-op> #<undefined-system "iolib">)
 67: (ccl::%%standard-combined-method-dcode (#<standard-method asdf/action:perform-with-restarts :around (t t)> #<standard-me..
 68: (nil #<Unknown Arguments>)
 69: (#<standard-method asdf/plan:perform-plan (t)> #<asdf/plan:sequential-plan #x30200647953D>)
 70: (ccl::%call-next-method (nil #<standard-method asdf/plan:perform-plan (t)> . 83321697))
 71: (ccl::call-with-compilation-unit #<ccl:compiled-lexical-closure (:internal ccl::with-compilation-unit-body (asdf/plan:pe..
 72: (#<standard-method asdf/plan:perform-plan :around (t)> #<asdf/plan:sequential-plan #x30200647953D>)
 73: (ccl::%%standard-combined-method-dcode (#<standard-method asdf/plan:perform-plan :around (t)> #<standard-method asdf/pla..
 74: (nil #<Unknown Arguments>)
 75: (ccl::%%check-keywords #(1 #() #<Combined-Method asdf/plan:perform-plan #x30200511C13F>) 83321708)
 76: (nil #<Unknown Arguments>)
 77: (#<standard-method asdf/operate:operate (asdf/operation:operation asdf/component:component)> #<define-op> #<undefined-sy..
 78: (ccl::%call-next-method ((nil) #<standard-method asdf/operate:operate (asdf/operation:operation asdf/component:component..
 79: ((:internal (asdf/operate:operate :around (t t))))
 80: (#<standard-method asdf/operate:operate :around (t t)> ((nil) #<standard-method asdf/operate:operate (asdf/operation:ope..
 81: (ccl::%%standard-combined-method-dcode (#<standard-method asdf/operate:operate :around (t t)> (#<standard-method asdf/op..
 82: (nil #<Unknown Arguments>)
 83: ((:internal (asdf/system:find-system (string))))
 84: (asdf/session:consult-asdf-cache (asdf/system:find-system "iolib") #<ccl:compiled-lexical-closure (:internal (asdf/syste..
 85: (#<standard-method asdf/component:find-component (string t)> "iolib" (nil) :registered nil)
 86: (ccl::%%check-keywords #(2 #(:registered) #<ccl:method-function asdf/component:find-component (string t)>) 83321827)
 87: (nil #<Unknown Arguments>)
 88: (ccl::%%check-keywords #(2 #(:registered) #<ccl:method-function asdf/component:find-component (cons t)>) 83321842)
 89: (nil #<Unknown Arguments>)
 90: (ccl::%%check-keywords #(2 #(:registered) #<ccl:method-function asdf/component:find-component (symbol t)>) 83321856)
 91: (nil #<Unknown Arguments>)
 92: (#<standard-method asdf/operate:operate (asdf/operation:operation t)> #<define-op> ("iolib"))
 93: (ccl::%call-next-method ((nil) #<standard-method asdf/operate:operate (asdf/operation:operation t)> #<define-op> ("iolib..
 94: ((:internal (asdf/operate:operate :around (t t))))
 95: (#<standard-method asdf/operate:operate :around (t t)> ((nil) #<standard-method asdf/operate:operate (asdf/operation:ope..
 96: (ccl::%%standard-combined-method-dcode (#<standard-method asdf/operate:operate :around (t t)> (#<standard-method asdf/op..
 97: (nil #<Unknown Arguments>)
 98: (asdf/session:call-with-asdf-session #<ccl:compiled-lexical-closure (:internal (asdf/operate:operate :around (t t))) #x3..
 99: ((:internal (asdf/operate:operate :around (t t))))
 100: (#<standard-method asdf/operate:operate :around (t t)> ((nil) ((#<standard-method asdf/operate:operate :before (asdf/ope..
 101: (ccl::%%standard-combined-method-dcode (#<standard-method asdf/operate:operate :around (t t)> (#<standard-method asdf/op..
 102: (nil #<Unknown Arguments>)
 103: ((:internal asdf/find-system:load-asd))
 104: ((:internal (asdf/system:find-system (string))))
 105: (asdf/session:consult-asdf-cache (asdf/system:find-system "iolib") #<ccl:compiled-lexical-closure (:internal (asdf/syste..
 106: (asdf/session:call-with-asdf-session #<ccl:compiled-lexical-closure (:internal (asdf/system:find-system (string))) #x302..
 107: (ccl::call-check-regs asdf/system:find-system :iolib)
 108: (ccl::cheap-eval (asdf/system:find-system :iolib))
 109: (swank::eval-region "(asdf:find-system :iolib)
      ")
 110: ((:internal swank-repl::repl-eval))
 111: (swank-repl::track-package #<ccl:compiled-lexical-closure (:internal swank-repl::repl-eval) #x30200646469F>)
 112: ((:internal swank-repl::repl-eval))
 113: (swank::call-with-retry-restart "Retry SLIME REPL evaluation request." #<ccl:compiled-lexical-closure (:internal swank-r..
 114: ((:internal swank-repl::repl-eval))
 115: (#<Anonymous Function #x30200139A5FF> #<ccl:compiled-lexical-closure (:internal swank-repl::repl-eval) #x30200646475F>)
 116: (swank/backend:call-with-syntax-hooks #<ccl:compiled-lexical-closure (:internal swank-repl::repl-eval) #x30200646475F>)
 117: (swank::call-with-buffer-syntax nil #<ccl:compiled-lexical-closure (:internal swank-repl::repl-eval) #x30200646475F>)
 118: (swank-repl::repl-eval "(asdf:find-system :iolib)
      ")
 119: (swank-repl:listener-eval "(asdf:find-system :iolib)
      " :window-width nil)
 120: (ccl::call-check-regs swank-repl:listener-eval "(asdf:find-system :iolib)
      ")
 121: (ccl::cheap-eval (swank-repl:listener-eval "(asdf:find-system :iolib)
      "))
 122: (swank:eval-for-emacs (swank-repl:listener-eval "(asdf:find-system :iolib)
      ") "COMMON-LISP-USER" 703)
 123: (swank::process-requests nil)
 124: ((:internal swank::handle-requests))
 125: ((:internal swank::handle-requests))
 126: (swank/backend:call-with-debugger-hook #<Compiled-function swank:swank-debugger-hook #x30200157B67F> #<ccl:compiled-lexi..
 127: (swank/backend:call-with-debugger-hook #<Compiled-function swank:swank-debugger-hook #x30200157B67F> #<ccl:compiled-lexi..
 128: ((:internal swank::handle-requests))
 129: (swank::call-with-bindings ((*standard-input* . #2=#<swank/gray::slime-input-stream #x302004D830ED>) (*standard-output* ..
 130: (swank::handle-requests #<multithreaded-connection #x302004D6E48D> nil)
 131: (swank-repl::repl-loop #<multithreaded-connection #x302004D6E48D>)
 132: ((:internal swank-repl::spawn-repl-thread))
 133: (swank::call-with-bindings ((*print-pretty*) (*print-level*) (*print-length*) (*print-circle* . t) (*print-case* . :down..
 134: ((:internal swank-repl::spawn-repl-thread))
 135: (ccl::run-process-initial-form #<process repl-thread(77) [Active] #x302004D7272D> (#<ccl:compiled-lexical-closure (:inte..
 136: ((:internal (ccl::%process-preset-internal (ccl:process))) #<process repl-thread(77) [Active] #x302004D7272D> (#<ccl:com..
 137: ((:internal ccl::thread-make-startup-function))