I was using an older version in XEmacs, then did a cvs update today. Using sbcl-mt, slime now ends in an error: M-x slime ends with * ;; Swank started at port: 32846. debugger invoked on a SIMPLE-ERROR in thread 2825: There is no applicable method for the generic function #<STANDARD-GENERIC-FUNCTION SWANK-BACKEND:SPAWN (0)> when called with arguments (# :NAME "Swank"). You can type HELP for debugger help, or (SB-EXT:QUIT) to exit from SBCL. restarts (invokable by number or by possibly-abbreviated name): 0: [ABORT ] Reduce debugger level (leaving debugger, returning to toplevel). 1: [TOPLEVEL] Restart at toplevel READ/EVAL/PRINT loop. ((NO-APPLICABLE-METHOD (T)) #<unavailable argument> #<unavailable argument> #<STANDARD-GENERIC-FUNCTION SWANK-BACKEND:SPAWN (0)> (#<FUNCTION "CLOSURE" {965627D}> :NAME "Swank")) 0] :a Liam