This has been happening for a while - don't remember how long but it's not something that has arisen in the last few days. I don't travel in this are of slime so perhaps one of you might give me some hints on how to debug it. The symptom is a slime panic, followed by me having to control-g interrupt. Then I need to do M-x slime to get it going again. I've including the *messages* buffer, the *slime-events* buffer, and the emacs debugger stack trace below. Thanks, -Alan *messages* Polling "/tmp/slime.623".. (Abort with `M-x slime-abort-connection'.) [22 times] Connecting to Swank on port 49856.. Process bridge is installed Connected. Hack and be merry! (No files need saving) Performing ASDF "LOAD-OP" on system "kb" net-read error: (invalid-read-syntax "#") Lisp connection closed unexpectedly: deleted error in process filter: byte-code: PANIC! error in process filter: PANIC! Loading debug...done Entering debugger.. Hangs, I hit control g - debugger buffer ---Debugger entered--Lisp error: (quit) accept-process-output(nil 0 10000) (while t (accept-process-output nil 0 10000)) (let ((debug-on-quit t) (inhibit-quit nil)) (while t (accept- process-output nil 0 10000))) (catch tag (slime-rex (tag sexp) (sexp package) (... ... ...) (... ...)) (let (... ...) (while t ...))) (apply (function funcall) (catch tag (slime-rex ... ... ... ...) (let ... ...))) (let* ((tag ...) (slime-stack-eval-tags ...)) (apply (function funcall) (catch tag ... ...))) slime-eval((swank:compiler-notes-for-emacs)) slime-compiler-notes() (let ((notes ...)) (with-current-buffer buffer (multiple-value- bind ... result ... ...)) (run-hook-with-args (quote slime- compilation-finished-hook) notes)) slime-compilation-finished(("NIL" "14.73") #<buffer *slime-repl openmcl*>) (lambda (G93794 result) (slime-compilation-finished result (symbol- value G93794)))(--buffer-- ("NIL" "14.73")) apply((lambda (G93794 result) (slime-compilation-finished result (symbol-value G93794))) --buffer-- ("NIL" "14.73")) (lambda (&rest --cl-rest--) (apply (lambda ... ...) (quote -- buffer--) --cl-rest--))(("NIL" "14.73")) funcall((lambda (&rest --cl-rest--) (apply (lambda ... ...) (quote --buffer--) --cl-rest--)) ("NIL" "14.73")) (if (symbol-value G93806) (funcall (symbol-value G93806) result)) (let* ((--rest--93804 rand-93802) (result ...)) (if (symbol-value G93806) (funcall ... result))) (cond ((eql op-93801 ...) (let* ... ...)) ((eql op-93801 ...) (let* ... ... ...)) (t (error "destructure-case failed: %S" tmp-93803))) (let* ((tmp-93803 G93797) (op-93801 ...) (rand-93802 ...)) (cond (... ...) (... ...) (t ...))) (lambda (G93806 G93797) (let* (... ... ...) (cond ... ... ...)))(-- cont-- (:ok ("NIL" "14.73"))) apply((lambda (G93806 G93797) (let* (... ... ...) (cond ... ... ...))) --cont-- (:ok ("NIL" "14.73"))) (lambda (&rest --cl-rest--) (apply (lambda ... ...) (quote -- cont--) --cl-rest--))((:ok ("NIL" "14.73"))) slime-dispatch-event((:return (:ok ("NIL" "14.73")) 3) #<process SLIME Lisp>) slime-process-available-input() slime-net-filter(#<process SLIME Lisp> " . 1) (\"defppclapmacro \" . 2) (\"with-nx-declarations\" . 1) (\"do-present-symbols\" . 1) (\"numeric-dispatch\" . 1) (\"defnx1\" . 3) (\"defnx2\" . 3) (\"pprint-logical-block+\" . 1) (\"with-self-bound-io-control-vars \" . 0) (\"with-ioblock-lock-grabbed-maybe\" . 1) (\"using-resource \" . 1) (\"with-ioblock-output-locked\" . 1) (\"with-periodic-task- mask\" . 1) (\"with-ppc-p2-declarations\" . 1) (\"defppc2\" . 3) (\"with-ioblock-lock-grabbed\" . 1) (\"defnxdecl\" . 2) (\"with- package-lock\" . 1) (\"with-locked-dll-header\" . 1) (\"rlet\" . 1) (\"define-declaration\" . 2) (\"catch-cancel\" . 0) (\"with-pointer- to-ivector\" . 1) (\"with-cstrs\" . 1) (\"with-terminal-input\" . 0) (\"def-load-pointers\" . 2) (\"with-read-lock\" . 1) (\"with-write- lock\" . 1) (\"define-setf-method\" . 2) (\"defcallback\" . 2) (\"% vstack-block\" . 1) (\"with-string-vector\" . 1) (\"with-lock-grabbed \" . 1) (\"dovector\" . 1) (\"%stack-block\" . 1) (\"let-globally\" . 1) (\"rletz\" . 1) (\"with-loop-list-collection-head\" . 1) (\"with- minimax-value\" . 1) (\"with-errorfree-printing\" . 0) (\"with-open- socket\" . 1) (\"with-stack-short-floats\" . 1) (\"defppcmacro\" . 2) (\"defsystem\" . 1) (\"with-xref\" . 0) (\"rebinding\" . 1) (\"with- unique-names\" . 1) (\"regex-apropos-aux\" . 1) (\"insert-char-class- tester\" . 1) (\"with-struct\" . 2) (\"defimplementation\" . 2) (\"with-compilation-hooks\" . 1) (\"with-time/cons\" . 2) (\"with- monitoring\" . 2) (\"presenting-object-if\" . 3) (\"with-describe- settings\" . 1) (\"with-connection\" . 1) (\"with-temp-package\" . 1) (\"presenting-object\" . 2) (\"with-bindings\" . 1) (\"with-io- redirection\" . 1) (\"with-reader-error-handler\" . 1) (\"defslimefun \" . 2) (\"without-interrupts\" . 0) (\"with-buffer-syntax\" . 1) (\"without-package-locks\" . 0) (\"atomically\" . 0) (\"fast\" . 0) (\"with-process-lock\" . 1) (\"without-scheduling\" . 0) (\"without- interrupts\" . 0) (\"with-timeout\" . 1) (\"with-stream-output-buffer \" . 2) (\"with-stream-input-buffer\" . 2) (\"with-unhex-cvt-buffer \" . 1) (\"with-tohex-cvt-buffer\" . 1) (\"define-some-element- constructors\" . 0) (\"define-element-constructors\" . 1) (\"defaskmacro\" . 2) (\"with-ask-vars\" . 1) (\">>\" . 1) (\"do- register-groups\" . 2) (\"<<\" . 1) (\"do-scans\" . 1) (\"presenting- object\" . 2) (\"with-ask-var\" . 1) (\"with-fast-string-functions \" . 0) (\"ask-lambda\" . 1) (\"do-matches-as-strings\" . 1) (\"register-groups-bind\" . 2) (\"do-matches\" . 1) (\"defask\" . 2) (\"&\" . 0) (\"with-augmented-environment\" . 1) (\"walker- environment-bind\" . 1) (\"with-new-definition-in-environment\" . 1))) \n0001AC(:new-features (:aserve :htmlgen :acl-compat :md5-small- length :cl-ppcre :asdf-install :split-sequence :asdf :primary- classes :ccl :ccl-2 :ccl-3 :ccl-4 :coral :common- lisp :mcl :openmcl :ansi-cl :processes :unix :openmcl-native- threads :openmcl-partial-mop :mcl-common-mop-subset :openmcl- mop-2 :interfaces-2 :powerpc :ppc-target :ppc-clos :ppc32- target :ppc32-host :darwinppc-target :darwinppc- host :darwin :poweropen-target))\n000022(:return (:ok (\"NIL\" \"14.73 \")) 3)\n") --- *slime-events* (:emacs-rex (swank:connection-info) nil t 1) (:open-dedicated-output-stream 49858) (:indentation-update (("with-lock-grabbed-maybe" . 1) ("with-ioblock-input-locked" . 1) ("with-package-write-lock" . 1) ("with-slot-values" . 2) ("with-eagain" . 2) ("with-declarations" . 1) ("without-gcing" . 0) ("with-restart" . 1) ("with-auxiliary-foreign-types" . 0) ("with-ppc-local-vinsn-macros" . 1) ("with-package-read-lock" . 1) ("while" . 1) ("%ilogior" . 1) ("with-call-method-context" . 1) ("with-dll-node-freelist" . 1) ("with-open-dir" . 1) ("collecting" . 0) ("ignoring-without-interrupts" . 0) ("with-area-macptr" . 1) ("with-standard-abort-handling" . 1) ...)) (:return (:ok (624 "OpenMCL" "openmcl" (:cl-ppcre :asdf-install :split-sequence :asdf :primary- classes :ccl :ccl-2 :ccl-3 :ccl-4 :coral :common- lisp :mcl :openmcl :ansi-cl :processes :unix :openmcl-native- threads :openmcl-partial-mop :mcl-common-mop-subset :openmcl-mop-2 ...) :spawn "Version (Beta: Darwin) 0.14.3" "Alan-Ruttenbergs- Laptop.local")) 1) (:emacs-rex (swank:list-all-systems-in-central-registry) "COMMON-LISP-USER" :repl-thread 2) (:return (:ok ("iterate.asd")) 2) (:emacs-rex (swank:operate-on-system-for-emacs "kb" "LOAD-OP") "COMMON-LISP-USER" :repl-thread 3) (:indentation-update (("with-lock-grabbed-maybe" . 1) ("with-ioblock-input-locked" . 1) ("with-package-write-lock" . 1) ("with-slot-values" . 2) ("with-eagain" . 2) ("with-declarations" . 1) ("without-gcing" . 0) ("with-restart" . 1) ("with-auxiliary-foreign-types" . 0) ("with-ppc-local-vinsn-macros" . 1) ("with-package-read-lock" . 1) ("while" . 1) ("%ilogior" . 1) ("with-call-method-context" . 1) ("with-dll-node-freelist" . 1) ("with-open-dir" . 1) ("collecting" . 0) ("ignoring-without-interrupts" . 0) ("with-area-macptr" . 1) ("with-standard-abort-handling" . 1) ...)) (:new-features (:aserve :htmlgen :acl-compat :md5-small-length :cl-ppcre :asdf- install :split-sequence :asdf :primary- classes :ccl :ccl-2 :ccl-3 :ccl-4 :coral :common- lisp :mcl :openmcl :ansi-cl :processes :unix ...)) (:return (:ok ("NIL" "14.73")) 3) (:emacs-rex (swank:compiler-notes-for-emacs) nil t 4)