When I am alerted to a symbol conflict: USE-PACKAGE #<PACKAGE "UTIL"> causes name-conflicts in #<PACKAGE "COMMON-LISP-USER"> between the following symbols: UTIL:APPLY, APPLY [Condition of type SB-INT:NAME-CONFLICT] See also: Common Lisp Hyperspec, 11.1.1.2.5 [section] Restarts: 0: [RESOLVE-CONFLICT] Resolve conflict. 1: [ABORT-REQUEST] Abort handling SLIME request. 2: [TERMINATE-THREAD] Terminate this thread (#<THREAD "repl-thread" {9167109}>) and pick 0, I get the following error: There is no applicable method for the generic function #<STANDARD-GENERIC-FUNCTION STREAM-LINE-LENGTH (1)> when called with arguments (#<SWANK-BACKEND::SLIME-INPUT-STREAM {915D6B1}>). [Condition of type SIMPLE-ERROR] Restarts: 0: [ABORT] Return to sldb level 1. 1: [ABORT-REQUEST] Abort handling SLIME request. 2: [TERMINATE-THREAD] Terminate this thread (#<THREAD "repl-thread" {9167109}>) Backtrace: 0: ((SB-PCL::FAST-METHOD NO-APPLICABLE-METHOD (T)) #<unavailable argument> #<unavailable argument> #<STANDARD-GENERIC-FUNCTION STREAM-LINE-LENGTH (1)> (#<SWANK-BACKEND::SLIME-INPUT-STREAM {915D6B1}>)) ... full error attached Matt -- "You do not really understand something unless you can explain it to your grandmother." — Albert Einstein. There is no applicable method for the generic function #<STANDARD-GENERIC-FUNCTION STREAM-LINE-LENGTH (1)> when called with arguments (#<SWANK-BACKEND::SLIME-INPUT-STREAM {915D6B1}>). [Condition of type SIMPLE-ERROR] Restarts: 0: [ABORT] Return to sldb level 1. 1: [ABORT-REQUEST] Abort handling SLIME request. 2: [TERMINATE-THREAD] Terminate this thread (#<THREAD "repl-thread" {9167109}>) Backtrace: 0: ((SB-PCL::FAST-METHOD NO-APPLICABLE-METHOD (T)) #<unavailable argument> #<unavailable argument> #<STANDARD-GENERIC-FUNCTION STREAM-LINE-LENGTH (1)> (#<SWANK-BACKEND::SLIME-INPUT-STREAM {915D6B1}>)) 1: ((SB-PCL::FAST-METHOD NO-APPLICABLE-METHOD (T)) #<unavailable argument> #<unavailable argument> #<STANDARD-GENERIC-FUNCTION STREAM-LINE-LENGTH (1)> (#<SWANK-BACKEND::SLIME-INPUT-STREAM {915D6B1}>)) 2: (SB-IMPL::TWO-WAY-MISC #<TWO-WAY-STREAM :INPUT-STREAM #<SWANK-BACKEND::SLIME-INPUT-STREAM {915D6B1}> :OUTPUT-STREAM #<SB-SYS:FD-STREAM for "a constant string" {9028109}>> :LINE-LENGTH NIL NIL) 3: (SB-PRETTY::MAKE-PRETTY-STREAM #<TWO-WAY-STREAM :INPUT-STREAM #<SWANK-BACKEND::SLIME-INPUT-STREAM {915D6B1}> :OUTPUT-STREAM #<SB-SYS:FD-STREAM for "a constant string" {9028109}>>) 4: (SB-FORMAT::INTERPRET-FORMAT-LOGICAL-BLOCK #<TWO-WAY-STREAM :INPUT-STREAM #<SWANK-BACKEND::SLIME-INPUT-STREAM {915D6B1}> :OUTPUT-STREAM #<SB-SYS:FD-STREAM for "a constant string" {9028109}>> ("COMMON-LISP-USER" ((1 1 UTIL:APPLY) (1 2 APPLY))) ("COMMON-LISP-USER" ((1 1 UTIL:APPLY) (1 2 APPLY))) "" NIL ("Select " #<> "a " #<> "symbol " #<> "to " #<> "be " #<> ...) "" T) 5: (SB-FORMAT::<-FORMAT-DIRECTIVE-INTERPRETER #<TWO-WAY-STREAM :INPUT-STREAM #<SWANK-BACKEND::SLIME-INPUT-STREAM {915D6B1}> :OUTPUT-STREAM #<SB-SYS:FD-STREAM for "a constant string" {9028109}>> #<~@<> ("Select a symbol to be made accessible in " #<~

" package " #<~A> ":" #<~2I> #<~@:_> #<~{> #<~{> #<~V,' D> ...) ("COMMON-LISP-USER" ((1 1 UTIL:APPLY) (1 2 APPLY))) ("COMMON-LISP-USER" ((1 1 UTIL:APPLY) (1 2 APPLY)))) 6: (SB-FORMAT::INTERPRET-DIRECTIVE-LIST #<TWO-WAY-STREAM :INPUT-STREAM #<SWANK-BACKEND::SLIME-INPUT-STREAM {915D6B1}> :OUTPUT-STREAM #<SB-SYS:FD-STREAM for "a constant string" {9028109}>> (#<~@<> "Select a symbol to be made accessible in " #<~ " package " #<~A> ":" #<~2I> #<~@:_> #<~{> #<~{> ...) ("COMMON-LISP-USER" ((1 1 UTIL:APPLY) (1 2 APPLY))) ("COMMON-LISP-USER" ((1 1 UTIL:APPLY) (1 2 APPLY)))) 7: (SB-FORMAT::%FORMAT #<TWO-WAY-STREAM :INPUT-STREAM #<SWANK-BACKEND::SLIME-INPUT-STREAM {915D6B1}> :OUTPUT-STREAM #<SB-SYS:FD-STREAM for "a constant string" {9028109}>> "~&~@<Select a symbol to be made accessible in ~ package ~A:~2I~@:_~{~{~V,' D. ~S~}~@:_~}~@:>" ("COMMON-LISP-USER" ((1 1 UTIL:APPLY) (1 2 APPLY))) ("COMMON-LISP-USER" ((1 1 UTIL:APPLY) (1 2 APPLY)))) 8: (FORMAT #<TWO-WAY-STREAM :INPUT-STREAM #<SWANK-BACKEND::SLIME-INPUT-STREAM {915D6B1}> :OUTPUT-STREAM #<SB-SYS:FD-STREAM for "a constant string" {9028109}>> "~&~@<Select a symbol to be made accessible in ~ package ~A:~2I~@:_~{~{~V,' D. ~S~}~@:_~}~@:>") 9: ((LAMBDA NIL)) 10: (INVOKE-RESTART-INTERACTIVELY #<RESTART SB-INT:RESOLVE-CONFLICT {AD30879}>) 11: (SB-INT:EVAL-IN-LEXENV (SWANK:INVOKE-NTH-RESTART-FOR-EMACS 1 0) #<NULL-LEXENV>) 12: ((LAMBDA NIL)) 13: ((SB-PCL::FAST-METHOD SWANK-BACKEND:CALL-WITH-DEBUGGER-HOOK (T T)) #<unused argument> #<unused argument> #<FUNCTION SWANK:SWANK-DEBUGGER-HOOK> #<CLOSURE (LAMBDA NIL) {AE95AA5}>) 14: (SWANK::SLDB-LOOP 1) 15: ((SB-PCL::FAST-METHOD SWANK-BACKEND:CALL-WITH-DEBUGGING-ENVIRONMENT (T)) #<unused argument> #<unused argument> #<FUNCTION (LAMBDA NIL) {B271F15}>) 16: (SWANK::CALL-WITH-BINDINGS ((*PRINT-PRETTY*) (*PRINT-LEVEL* . 4) (*PRINT-LENGTH* . 10) (*PRINT-CIRCLE* . T) (*PRINT-READABLY*) (*PRINT-PPRINT-DISPATCH* . #<SB-PRETTY:PPRINT-DISPATCH-TABLE {B314759}>) (*PRINT-GENSYM* . T) (*PRINT-BASE* . 10) (*PRINT-RADIX*) (*PRINT-ARRAY* . T) ...) #<FUNCTION (LAMBDA NIL) {B271ED5}>) 17: (SWANK::DEBUG-IN-EMACS #<SB-INT:NAME-CONFLICT {AD30929}>) 18: (INVOKE-DEBUGGER #<SB-INT:NAME-CONFLICT {AD30929}>) 19: (ERROR #<SB-INT:NAME-CONFLICT {AD30929}>) 20: (SB-INT:NAME-CONFLICT #<PACKAGE "COMMON-LISP-USER"> USE-PACKAGE #<PACKAGE "UTIL">) 21: (USE-PACKAGE :UTIL #<PACKAGE "COMMON-LISP-USER">) 22: (SB-INT:EVAL-IN-LEXENV (USE-PACKAGE :UTIL) #<NULL-LEXENV>) 23: (SWANK::EVAL-REGION "(use-package :util) " T) 24: ((LAMBDA NIL)) 25: ((SB-PCL::FAST-METHOD SWANK-BACKEND:CALL-WITH-SYNTAX-HOOKS (T)) #<unused argument> #<unused argument> #<CLOSURE (LAMBDA NIL) {AD30425}>) 26: (SWANK::CALL-WITH-BUFFER-SYNTAX #<CLOSURE (LAMBDA NIL) {AD30425}>) 27: (SB-INT:EVAL-IN-LEXENV (SWANK:LISTENER-EVAL "(use-package :util) ") #<NULL-LEXENV>) 28: ((LAMBDA NIL)) 29: ((SB-PCL::FAST-METHOD SWANK-BACKEND:CALL-WITH-DEBUGGER-HOOK (T T)) #<unused argument> #<unused argument> #<FUNCTION SWANK:SWANK-DEBUGGER-HOOK> #<CLOSURE (LAMBDA NIL) {AD2BC4D}>) 30: ((LAMBDA NIL)) 31: ((LAMBDA NIL)) 32: (SWANK::CALL-WITH-REDIRECTED-IO #<SWANK::CONNECTION {90263F1}> #<CLOSURE (LAMBDA NIL) {AD2BB2D}>) 33: (SWANK::CALL-WITH-CONNECTION #<SWANK::CONNECTION {90263F1}> #<FUNCTION (LAMBDA NIL) {B2332FD}>) 34: (SWANK::HANDLE-REQUEST #<SWANK::CONNECTION {90263F1}>) 35: ((LAMBDA NIL)) 36: ((LAMBDA NIL)) 37: ((LAMBDA NIL)) 38: (SWANK::CALL-WITH-REDIRECTED-IO #<SWANK::CONNECTION {90263F1}> #<CLOSURE (LAMBDA NIL) {917808D}>) 39: (SWANK::CALL-WITH-CONNECTION #<SWANK::CONNECTION {90263F1}> #<CLOSURE (LAMBDA NIL) {917807D}>) 40: (SWANK::CALL-WITH-BINDINGS NIL #<CLOSURE (LAMBDA NIL) {917805D}>) 41: ((LAMBDA NIL)) 42: ("foreign function: call_into_lisp") 43: ("foreign function: funcall0") 44: ("foreign function: new_thread_trampoline") 45: ("foreign function: #xB7FC03B0")