If SLIME is connected to LispWorks running its own IDE and I execute "Compile Defun" on an arbitrary function in the LispWorks editor then I get a processor fault - full backtrace below. Does anyone have an idea what could be the cause?

FWIW, I can reproduce the error with a .lispworks init file that starts SWANK and is otherwise empty so it's pretty obvious that this is a problem related to SLIME/LW interaction.

Cheers, Edi.

** Processor Fault #xC0000005 at #x20C1C736 (#<function EDITOR::DISPLAY-COMPILE-FILE-STATUS 20C1C712>). [Condition of type SIMPLE-ERROR]

Restarts: 0: [ABORT] Abort job 1 :(BIND-STANDARD-STREAMS-AND-EXECUTE #1=#<EDITOR::EDITOR-OUTPUT-STREAM #<EDITOR:BUFFER Background Output> 20696154> (INTERNAL-DO-WITH-RANDOM-TYPEOUT #<closure (SUBFUNCTION CAPI::WITH-RANDOM-TYPEOUT-FUNC CAPI::FUNCALL-BACKGROUND-JOB-WITH-TYPEOUT-AUX) 213C123A> #1# #<CAPI:EDITOR-PANE CAPI:EDITOR-PANE 206A1034> #<CAPI:COLLECTOR-PANE LISPWORKS-TOOLS::BACKGROUND-OUTPUT-PANE 20695AB4> NIL)) 1: [ABORT] Quit process.

Backtrace: 0: CONDITIONS::CONDITIONS-ERROR (:INVISIBLEP T "** Processor Fault #x~X at #x~X~@[ (~s)~]." (3221225477 549570358 #<function EDITOR::DISPLAY-COMPILE-FILE-STATUS 20C1C712>)) Locals: CONDITIONS::DATUM = "** Processor Fault #x~X at #x~X~@[ (~s)~]." CONDITIONS::ARGUMENTS = (3221225477 549570358 #<function EDITOR::DISPLAY-COMPILE-FILE-STATUS 20C1C712>) [No catch-tags] 1: IO::FAULT-HANDLER-AUX (#<Raw value #x20C1C736 (549570358)> #<Raw value #xC0000005 (3221225477)>) Locals: IO::PC = #<Raw value #x20C1C736 (549570358)> IO::FAULT = #<Raw value #xC0000005 (3221225477)> [No catch-tags] 2: EDITOR::DISPLAY-COMPILE-FILE-STATUS (NIL #<pointer out of bounds 20C069AB> :DONT-KNOW) Locals: EDITOR::DONE = NIL EDITOR::CONDITION-SUMMARY = #<pointer out of bounds 20C069AB> EDITOR::FAILUREP = :DONT-KNOW [No catch-tags] 3: EDITOR::WITH-COMPILATION-ENVIRONMENT-AT-POINT-FN (#<EDITOR::POINT "foo.lisp" 0 offset 0 213C127C> NIL NIL #<closure (SUBFUNCTION 1 EDITOR::REGION-LISP-COMPILE) 213E7DFA>) Locals: EDITOR::POINT = #<EDITOR::POINT "foo.lisp" 0 offset 0 213C127C> EDITOR::START-MESSAGE = NIL EDITOR::END-MESSAGE = NIL EDITOR::BODY-FN = #<closure (SUBFUNCTION 1 EDITOR::REGION-LISP-COMPILE) 213E7DFA> [No catch-tags] 4: EDITOR::REGION-LISP-COMPILE (#<EDITOR:BUFFER #1=foo.lisp> #<EDITOR::POINT #1="foo.lisp" 0 offset 0 213C127C> #<EDITOR::POINT #1="foo.lisp" 0 offset 664 213C125C> &KEY NIL T #<closure (SUBFUNCTION 1 EDITOR::PANE-PROGRESS-HOOK) 213C12A2>) Locals: EDITOR:BUFFER = #<EDITOR:BUFFER foo.lisp> EDITOR::START = #<EDITOR::POINT "foo.lisp" 0 offset 0 213C127C> EDITOR::END = #<EDITOR::POINT "foo.lisp" 0 offset 664 213C125C> PRINT = NIL EDITOR::PARTIALP = T EDITOR::PROGRESS-HOOK = #<closure (SUBFUNCTION 1 EDITOR::PANE-PROGRESS-HOOK) 213C12A2> [No catch-tags] 5: EDITOR::IN-REGION-COMPILE (#<EDITOR:BUFFER #1=foo.lisp> #<EDITOR::POINT #1="foo.lisp" 0 offset 0 213C127C> #<EDITOR::POINT #1="foo.lisp" 0 offset 664 213C125C> &REST (:PRINT NIL :PARTIALP T :PROGRESS-HOOK #<closure (SUBFUNCTION 1 EDITOR::PANE-PROGRESS-HOOK) 213C12A2>)) Locals: EDITOR:BUFFER = #<EDITOR:BUFFER foo.lisp> EDITOR::START = #<EDITOR::POINT "foo.lisp" 0 offset 0 213C127C> EDITOR::END = #<EDITOR::POINT "foo.lisp" 0 offset 664 213C125C> EDITOR::OPTIONS = (:PRINT NIL :PARTIALP T :PROGRESS-HOOK #<closure (SUBFUNCTION 1 EDITOR::PANE-PROGRESS-HOOK) 213C12A2>) [No catch-tags] 6: EDITOR::BACKGROUND-REGION-COMPILE (#<EDITOR:BUFFER #1=foo.lisp> #<EDITOR::POINT #1="foo.lisp" 0 offset 0 213C127C> #<EDITOR::POINT #1="foo.lisp" 0 offset 664 213C125C> NIL &REST (:PRINT NIL :PARTIALP T :PROGRESS-HOOK #<closure (SUBFUNCTION 1 EDITOR::PANE-PROGRESS-HOOK) 213C12A2>)) Locals: EDITOR:BUFFER = #<EDITOR:BUFFER foo.lisp> EDITOR::START = #<EDITOR::POINT "foo.lisp" 0 offset 0 213C127C> EDITOR::END = #<EDITOR::POINT "foo.lisp" 0 offset 664 213C125C> EDITOR::MESSAGES = NIL EDITOR::OPTIONS = (:PRINT NIL :PARTIALP T :PROGRESS-HOOK #<closure (SUBFUNCTION 1 EDITOR::PANE-PROGRESS-HOOK) 213C12A2>) [No catch-tags] 7: CAPI::INTERNAL-DO-WITH-RANDOM-TYPEOUT (#<closure (SUBFUNCTION CAPI::WITH-RANDOM-TYPEOUT-FUNC CAPI::FUNCALL-BACKGROUND-JOB-WITH-TYPEOUT-AUX) 213C123A> #<EDITOR::EDITOR-OUTPUT-STREAM #<EDITOR:BUFFER Background Output> 20696154> #<CAPI:EDITOR-PANE CAPI:EDITOR-PANE 206A1034> #<CAPI:COLLECTOR-PANE LISPWORKS-TOOLS::BACKGROUND-OUTPUT-PANE 20695AB4> NIL) Locals: CAPI::FUNC = #<closure (SUBFUNCTION CAPI::WITH-RANDOM-TYPEOUT-FUNC CAPI::FUNCALL-BACKGROUND-JOB-WITH-TYPEOUT-AUX) 213C123A> STREAM = #<EDITOR::EDITOR-OUTPUT-STREAM #<EDITOR:BUFFER Background Output> 20696154> CAPI::PANE = #<CAPI:EDITOR-PANE CAPI:EDITOR-PANE 206A1034> CAPI:COLLECTOR-PANE = #<CAPI:COLLECTOR-PANE LISPWORKS-TOOLS::BACKGROUND-OUTPUT-PANE 20695AB4> CAPI::ALREADY-MAPPED = NIL [No catch-tags] 8: CAPI::BIND-STANDARD-STREAMS-AND-EXECUTE (#1=#<EDITOR::EDITOR-OUTPUT-STREAM #<EDITOR:BUFFER Background Output> 20696154> (CAPI::INTERNAL-DO-WITH-RANDOM-TYPEOUT #<closure (SUBFUNCTION CAPI::WITH-RANDOM-TYPEOUT-FUNC CAPI::FUNCALL-BACKGROUND-JOB-WITH-TYPEOUT-AUX) 213C123A> #1# #<CAPI:EDITOR-PANE CAPI:EDITOR-PANE 206A1034> #<CAPI:COLLECTOR-PANE LISPWORKS-TOOLS::BACKGROUND-OUTPUT-PANE 20695AB4> NIL)) Locals: STREAM = #<EDITOR::EDITOR-OUTPUT-STREAM #<EDITOR:BUFFER Background Output> 20696154> CAPI::FUNC-ARGS = (CAPI::INTERNAL-DO-WITH-RANDOM-TYPEOUT #<closure (SUBFUNCTION CAPI::WITH-RANDOM-TYPEOUT-FUNC CAPI::FUNCALL-BACKGROUND-JOB-WITH-TYPEOUT-AUX) 213C123A> #<EDITOR::EDITOR-OUTPUT-STREAM #<EDITOR:BUFFER Background Output> 20696154> #<CAPI:EDITOR-PANE CAPI:EDITOR-PANE 206A1034> #<CAPI:COLLECTOR-PANE LISPWORKS-TOOLS::BACKGROUND-OUTPUT-PANE 20695AB4> NIL) [No catch-tags] 9: MP::BACKGROUND-EXECUTE-LOOP NIL Locals: [No catch-tags] 10: (SUBFUNCTION MP::PROCESS-SG-FUNCTION MP::INITIALIZE-PROCESS-STACK) (:DONT-KNOW) Locals: MP::IGNORED = :DONT-KNOW [No catch-tags] 11: SYSTEM::%%FIRST-CALL-TO-STACK NIL Locals: [No catch-tags]