Backtrace:
  0: [327] frame binding variables (~ = dynamically):
       | ~ SWANK::*SWANK-STATE-STACK* <--> NIL
  1: [324] frame binding variables (~ = dynamically):
       | ~ SWANK::*SLDB-STEPPING-P* <--> NIL
  2: [321] frame binding variables (~ = dynamically):
       | ~ SWANK::*SLDB-LEVEL* <--> 0
  3: [318] frame binding variables (~ = dynamically):
       | ~ *PACKAGE* <--> #<PACKAGE COMMON-LISP-USER>
  4: <1/311> #<COMPILED-FUNCTION SWANK::DEBUG-IN-EMACS>
     [310] frame binding variables (~ = dynamically):
       | ~ SWANK::*SLIME-INTERRUPTS-ENABLED* <--> NIL
  5: <1/304> #<COMPILED-FUNCTION SWANK:INVOKE-SLIME-DEBUGGER>
     - #<COMPILED-FUNCTION SWANK::SWANK-DEBUGGER-HOOK-2-1>
  6: <1/302> #<COMPILED-FUNCTION SWANK::SWANK-DEBUGGER-HOOK-2-1>
     - #<COMPILED-FUNCTION SWANK::SWANK-DEBUGGER-HOOK-2-1>
  7: [301] frame binding variables (~ = dynamically):
       | ~ *DEBUGGER-HOOK* <--> NIL
  8: <1/297> #<COMPILED-FUNCTION #:|642 647 (DEFINTERFACE CALL-WITH-DEBUGGER-HOOK (HOOK FUN) ...)-63-3-1|>
     - #<COMPILED-FUNCTION #:|642 647 (DEFINTERFACE CALL-WITH-DEBUGGER-HOOK (HOOK FUN) ...)-63-3-1|>
  9: <1/292> #<COMPILED-FUNCTION SWANK-BACKEND:CALL-WITH-DEBUGGER-HOOK>
     - #<COMPILED-FUNCTION SWANK::SWANK-DEBUGGER-HOOK-2>
 10: <1/289> #<COMPILED-FUNCTION SWANK::SWANK-DEBUGGER-HOOK-2>
     - #<COMPILED-FUNCTION SWANK::SWANK-DEBUGGER-HOOK-2>
 11: [288] handler frame for conditions SWANK::INVOKE-DEFAULT-DEBUGGER
 12: [282] compiled tagbody frame for #(NIL)
 13: <1/276> #<COMPILED-FUNCTION SWANK:SWANK-DEBUGGER-HOOK>
     [274] frame binding variables (~ = dynamically):
       | ~ *DEBUGGER-HOOK* <--> #<COMPILED-FUNCTION SWANK:SWANK-DEBUGGER-HOOK>
 14: <1/271> #<SYSTEM-FUNCTION INVOKE-DEBUGGER> 1
     [270] frame binding variables (~ = dynamically):
       | ~ SYSTEM::*PRIN-STREAM* <--> #<UNBOUND>
 15: [267] frame binding variables (~ = dynamically):
       | ~ *PRINT-READABLY* <--> NIL
 16: [264] frame binding variables (~ = dynamically):
       | ~ *PRINT-ESCAPE* <--> T
 17: <1/262> #<SYSTEM-FUNCTION ERROR>
     - #<SIMPLE-ERROR #x0003343C67D0>
 18: [260] frame binding variables (~ = dynamically):
       | ~ SYSTEM::*ACTIVE-RESTARTS* <--> 
     (#S(RESTART :NAME ABORT :TEST #1=#<COMPILED-FUNCTION SYSTEM::DEFAULT-RESTART-TEST> :INVOKE-TAG #:SIMPLE-RESTART-2..
 19: [257] compiled tagbody frame for #(NIL)
 20: <1/251> #<COMPILED-FUNCTION SYSTEM::SIMPLE-ASSERT-FAILED>
     - #(NIL T)
 21: <1/247> #<COMPILED-FUNCTION SWANK::HANDLE-REQUESTS>
     - #<COMPILED-FUNCTION SWANK::MAKE-REPL-INPUT-STREAM-1-1>
 22: <1/244> #<COMPILED-FUNCTION SWANK::MAKE-REPL-INPUT-STREAM-1-1>
     - #<COMPILED-FUNCTION SWANK::MAKE-REPL-INPUT-STREAM-1-1>
 23: [243] frame binding variables (~ = dynamically):
 24: <1/238> #<COMPILED-FUNCTION SWANK::CALL-WITH-BINDINGS>
     - (#<IO UNBUFFERED SOCKET-STREAM CHARACTER 0.0.0.0:55374> #<INPUT UNBUFFERED FILE-STREAM CHARACTER #P"/dev/fd/0" @2>)
 25: <1/232> #<COMPILED-FUNCTION SWANK::MAKE-REPL-INPUT-STREAM-1>
     - #<COMPILED-FUNCTION SWANK::MAKE-REPL-INPUT-STREAM-1>
 26: <1/229> #<COMPILED-FUNCTION #:|84 97 (DEFMETHOD STREAM-READ-CHAR (#) ...)-12-1-1-1|>
     - #<COMPILED-FUNCTION #:|84 97 (DEFMETHOD STREAM-READ-CHAR (#) ...)-12-1-1-1|>
 27: <1/227> #<COMPILED-FUNCTION #:|1043 1047 (DEFINTERFACE CALL-WITH-LOCK-HELD (LOCK FUNCTION) ...)-123-3-1|>
     - #<COMPILED-FUNCTION #:|1043 1047 (DEFINTERFACE CALL-WITH-LOCK-HELD (LOCK FUNCTION) ...)-123-..
 28: <1/222> #<COMPILED-FUNCTION SWANK-BACKEND:CALL-WITH-LOCK-HELD>
     [220] compiled block frame for STREAM-READ-CHAR
 29: <1/215> #<COMPILED-FUNCTION #:|84 97 (DEFMETHOD STREAM-READ-CHAR (#) ...)-12-1-1|>
     <2/215> #<STANDARD-GENERIC-FUNCTION STREAM-READ-CHAR>
     <3/215> #<STANDARD-GENERIC-FUNCTION STREAM-READ-CHAR>
     - #<SWANK..
 30: [213] frame binding variables (~ = dynamically):
       | ~ SYSTEM::*READING-STRUCT* <--> NIL
 31: [210] frame binding variables (~ = dynamically):
       | ~ SYSTEM::*READING-ARRAY* <--> NIL
 32: [207] frame binding variables (~ = dynamically):
       | ~ SYSTEM::*BACKQUOTE-LEVEL* <--> #<UNBOUND>
 33: [204] frame binding variables (~ = dynamically):
       | ~ SYSTEM::*READ-REFERENCE-TABLE* <--> #<UNBOUND>
 34: [201] frame binding variables (~ = dynamically):
       | ~ SYSTEM::*READ-PRESERVE-WHITESPACE* <--> #<UNBOUND>
 35: [198] frame binding variables (~ = dynamically):
       | ~ SYSTEM::*READ-RECURSIVE-P* <--> #<UNBOUND>
 36: <1/195> #<SYSTEM-FUNCTION READ>
     [191] frame binding variables (~ = dynamically):
       | ~ SYSTEM::*ACTIVE-RESTARTS* <--> 
     (#S(RESTART :NAME SWANK::CLOSE-CONNECTION :TEST #<COMPILED-FUNCTION SYSTEM::DEFAU..
 37: [188] catch frame for tag #:SIMPLE-RESTART-23571
 38: <1/184> #<COMPILED-FUNCTION SWANK::SIMPLE-REPL>
     - #<COMPILED-FUNCTION SWANK::SIMPLE-SERVE-REQUESTS-1-2-2-2>
 39: <1/183> #<COMPILED-FUNCTION SWANK::SIMPLE-SERVE-REQUESTS-1-2-2-2>
     - #<COMPILED-FUNCTION SWANK::SIMPLE-SERVE-REQUESTS-1-2-2-2>
 40: [182] handler frame for conditions SWANK::SWANK-PROTOCOL-ERROR
 41: <1/175> #<COMPILED-FUNCTION SWANK::SIMPLE-SERVE-REQUESTS-1-2-2>
     - #<COMPILED-FUNCTION SWANK::SIMPLE-SERVE-REQUESTS-1-2-2>
 42: [174] handler frame for conditions SWANK::SWANK-PROTOCOL-ERROR
 43: [168] compiled tagbody frame for #(NIL)
 44: [162] frame binding variables (~ = dynamically):
       | ~ *STANDARD-INPUT* <--> #<IO SYNONYM-STREAM SWANK::*CURRENT-STANDARD-INPUT*>
 45: [158] frame binding variables (~ = dynamically):
       | ~ SYSTEM::*ACTIVE-RESTARTS* <--> 
     (#S(RESTART :NAME ABORT :TEST #<COMPILED-FUNCTION SYSTEM::DEFAULT-RESTART-TEST> :INVOKE-TAG NIL :INVOKE-FUNCTION ..
 46: [155] catch frame for tag #:SIMPLE-RESTART-23509
 47: <1/151> #<COMPILED-FUNCTION SWANK::SIMPLE-SERVE-REQUESTS-1-2>
     - #<COMPILED-FUNCTION SWANK::SIMPLE-SERVE-REQUESTS-1-2>
 48: <1/149> #<COMPILED-FUNCTION #:|80 88 (DEFIMPLEMENTATION CALL-WITH-USER-BREAK-HANDLER (HANDLER FUNCTION) ...)-6-1-1-2|>
     - #<COMPILED-FUNCTION #:|80 88 (DEFIMPLEMENTATION CALL-WITH-USER-BREAK-HANDLER (H..
 49: [148] handler frame for conditions SYSTEM::SIMPLE-INTERRUPT-CONDITION
 50: <1/140> #<COMPILED-FUNCTION #:|80 88 (DEFIMPLEMENTATION CALL-WITH-USER-BREAK-HANDLER (HANDLER FUNCTION) ...)-6-1-1|>
     - #<COMPILED-FUNCTION #:|80 88 (DEFIMPLEMENTATION CALL-WITH-USER-BREAK-HANDLER (HAN..
 51: <1/135> #<COMPILED-FUNCTION SWANK-BACKEND:CALL-WITH-USER-BREAK-HANDLER>
     - #<COMPILED-FUNCTION SWANK::SIMPLE-SERVE-REQUESTS-1>
 52: <1/132> #<COMPILED-FUNCTION SWANK::SIMPLE-SERVE-REQUESTS-1>
     - #<COMPILED-FUNCTION SWANK::SIMPLE-SERVE-REQUESTS-1>
 53: [131] frame binding variables (~ = dynamically):
       | ~ *DEBUGGER-HOOK* <--> #<COMPILED-FUNCTION SWANK:SWANK-DEBUGGER-HOOK>
 54: <1/127> #<COMPILED-FUNCTION #:|642 647 (DEFINTERFACE CALL-WITH-DEBUGGER-HOOK (HOOK FUN) ...)-63-3-1|>
     - #<COMPILED-FUNCTION #:|642 647 (DEFINTERFACE CALL-WITH-DEBUGGER-HOOK (HOOK FUN) ...)-63-3-1|>
 55: <1/122> #<COMPILED-FUNCTION SWANK-BACKEND:CALL-WITH-DEBUGGER-HOOK>
     - #<COMPILED-FUNCTION SWANK::CALL-WITH-CONNECTION-2-2-1>
 56: <1/119> #<COMPILED-FUNCTION SWANK::CALL-WITH-CONNECTION-2-2-1>
     - #<COMPILED-FUNCTION SWANK::CALL-WITH-CONNECTION-2-2-1>
 57: [118] frame binding variables (~ = dynamically):
 58: <1/113> #<COMPILED-FUNCTION SWANK::CALL-WITH-BINDINGS>
     - #<COMPILED-FUNCTION SWANK::CALL-WITH-CONNECTION-2-2>
 59: <1/110> #<COMPILED-FUNCTION SWANK::CALL-WITH-CONNECTION-2-2>
     - #<COMPILED-FUNCTION SWANK::CALL-WITH-CONNECTION-2-2>
 60: [109] handler frame for conditions SWANK::SWANK-PROTOCOL-ERROR
 61: <1/102> #<COMPILED-FUNCTION SWANK::CALL-WITH-CONNECTION-2>
     - #<COMPILED-FUNCTION SWANK::CALL-WITH-CONNECTION-2>
 62: [101] handler frame for conditions SWANK::SWANK-PROTOCOL-ERROR
 63: [95] compiled tagbody frame for #(NIL)
 64: [89] frame binding variables (~ = dynamically):
       | ~ SWANK::*SLIME-INTERRUPTS-ENABLED* <--> #<UNBOUND>
 65: [85] frame binding variables (~ = dynamically):
       | ~ SWANK-BACKEND:*PENDING-SLIME-INTERRUPTS* <--> #<UNBOUND>
 66: [82] frame binding variables (~ = dynamically):
       | ~ SWANK::*EMACS-CONNECTION* <--> NIL
 67: <1/77> #<COMPILED-FUNCTION SWANK::CALL-WITH-CONNECTION>
     [75] unwind-protect frame
 68: <1/71> #<COMPILED-FUNCTION SWANK::SIMPLE-SERVE-REQUESTS>
     - #<COMPILED-FUNCTION SWANK::SIMPLE-SERVE-REQUESTS>
 69: <1/68> #<COMPILED-FUNCTION SWANK::SERVE-REQUESTS>
     - #<SWANK::CONNECTION #x0003343C4710>
 70: [65] unwind-protect frame
 71: <1/61> #<COMPILED-FUNCTION SWANK::SERVE-CONNECTION>
     - #<COMPILED-FUNCTION SWANK::SETUP-SERVER-SERVE>
 72: <1/56> #<COMPILED-FUNCTION SWANK::SETUP-SERVER-SERVE>
     - NIL
 73: <1/50> #<COMPILED-FUNCTION SWANK::SETUP-SERVER>
     - #(NIL "/tmp/slime.2941")
 74: <1/43> #<COMPILED-FUNCTION SWANK:START-SERVER>
     <2/42> #<SYSTEM-FUNCTION FUNCALL> 4
     - SWANK:START-SERVER
 75: [38] EVAL frame for form (FUNCALL (READ-FROM-STRING "swank:start-server") "/tmp/slime.2941" :CODING-SYSTEM "iso-latin-1-unix")
 76: <1/35> #<SPECIAL-OPERATOR PROGN>
     [34] EVAL frame for form 
     (PROGN (LOAD "~/.emacs.d/lisp/slime/swank-loader.lisp" :VERBOSE T) (FUNCALL (READ-FROM-STRING "swank-loader:init"))
      ..)