Backtrace:
  0: (SB-BSD-SOCKETS::ADDRINFO-ERROR "getaddrinfo" 8)
  1: (SB-BSD-SOCKETS:GET-HOST-BY-NAME #<unavailable argument>)
  2: (XLIB::OPEN-X-STREAM NIL 0 #<unused argument>)
  3: (XLIB:OPEN-DISPLAY NIL :DISPLAY 0 :PROTOCOL NIL :AUTHORIZATION-NAME NIL :AUTHORIZATION-DATA NIL)
  4: (SB-INT:SIMPLE-EVAL-IN-LEXENV (XLIB:OPEN-DISPLAY NIL) #<NULL-LEXENV>)
  5: (EVAL (XLIB:OPEN-DISPLAY NIL))
  6: (SWANK::EVAL-REGION "(xlib:open-display nil) ..)
  7: ((LAMBDA NIL :IN SWANK-REPL::REPL-EVAL))
  8: (SWANK-REPL::TRACK-PACKAGE #<CLOSURE (LAMBDA NIL :IN SWANK-REPL::REPL-EVAL) {100283D14B}>)
  9: (SWANK::CALL-WITH-RETRY-RESTART "Retry SLIME REPL evaluation request." #<CLOSURE (LAMBDA NIL :IN SWANK-REPL::REPL-EVAL) {100283D0EB}>)
 10: (SWANK::CALL-WITH-BUFFER-SYNTAX NIL #<CLOSURE (LAMBDA NIL :IN SWANK-REPL::REPL-EVAL) {100283D0CB}>)
 11: (SWANK-REPL::REPL-EVAL "(xlib:open-display nil) ..)
 12: (SB-INT:SIMPLE-EVAL-IN-LEXENV (SWANK-REPL:LISTENER-EVAL "(xlib:open-display nil) ..)
 13: (EVAL (SWANK-REPL:LISTENER-EVAL "(xlib:open-display nil) ..)
 14: (SWANK:EVAL-FOR-EMACS (SWANK-REPL:LISTENER-EVAL "(xlib:open-display nil) ..)
 15: (SWANK::PROCESS-REQUESTS T)
 16: ((LAMBDA NIL :IN SWANK::HANDLE-REQUESTS))
 17: ((LAMBDA NIL :IN SWANK::HANDLE-REQUESTS))
 18: (SWANK/SBCL::CALL-WITH-BREAK-HOOK #<FUNCTION SWANK:SWANK-DEBUGGER-HOOK> #<CLOSURE (LAMBDA NIL :IN SWANK::HANDLE-REQUESTS) {100283B68B}>)
 19: ((FLET SWANK/BACKEND:CALL-WITH-DEBUGGER-HOOK :IN "/home/vms/.emacs.d/elpa/slime-20181211.1434/swank/sbcl.lisp") #<FUNCTION SWANK:SWANK-DEBUGGER-HOOK> #<CLOSURE (LAMBDA NIL :IN SWANK::HANDLE-REQUESTS) ..
 20: (SWANK::CALL-WITH-BINDINGS ((*STANDARD-INPUT* . #1=#<SWANK/GRAY::SLIME-INPUT-STREAM {10021EA763}>) (*STANDARD-OUTPUT* . #2=#<SWANK/GRAY::SLIME-OUTPUT-STREAM {10022D05D3}>) (*TRACE-OUTPUT* . #2#) (*ERR..
 21: (SWANK::HANDLE-REQUESTS #<SWANK::SINGLETHREADED-CONNECTION {1004B2A853}> T)
 22: ((LABELS SWANK/SBCL::RUN :IN SWANK/BACKEND:ADD-FD-HANDLER) 5)
 23: (SB-IMPL::SUB-SUB-SERVE-EVENT NIL NIL)
 24: (SB-IMPL::SUB-SERVE-EVENT NIL NIL NIL)
 25: (SB-SYS:WAIT-UNTIL-FD-USABLE 0 :INPUT NIL T)
 26: (SB-IMPL::REFILL-INPUT-BUFFER #<SB-SYS:FD-STREAM for "standard input" {1005049153}>)
 27: (SB-IMPL::INPUT-CHAR/ASCII #<SB-SYS:FD-STREAM for "standard input" {1005049153}> NIL 0)
 28: ((LAMBDA (&REST REST) :IN SB-IMPL::GET-EXTERNAL-FORMAT) #<SB-SYS:FD-STREAM for "standard input" {1005049153}> NIL 0)
 29: (READ-CHAR #<SB-SYS:FD-STREAM for "standard input" {1005049153}> NIL 0 #<unused argument>)
 30: (READ-CHAR #<SYNONYM-STREAM :SYMBOL SB-SYS:*STDIN* {100001D353}> NIL 0 #<unused argument>)
 31: (SB-IMPL::%READ-PRESERVING-WHITESPACE #<SYNONYM-STREAM :SYMBOL SB-SYS:*STDIN* {100001D353}> NIL (NIL) T)
 32: (SB-IMPL::%READ-PRESERVING-WHITESPACE #<SYNONYM-STREAM :SYMBOL SB-SYS:*STDIN* {100001D353}> NIL (NIL) NIL)
 33: (READ #<SYNONYM-STREAM :SYMBOL SB-SYS:*STDIN* {100001D353}> NIL (NIL) NIL)
 34: (SB-IMPL::REPL-READ-FORM-FUN #<SYNONYM-STREAM :SYMBOL SB-SYS:*STDIN* {100001D353}> #<unused argument>)
 35: (SB-IMPL::REPL-FUN NIL)
 36: ((LAMBDA NIL :IN SB-IMPL::TOPLEVEL-REPL))
 37: (SB-IMPL::%WITH-REBOUND-IO-SYNTAX #<CLOSURE (LAMBDA NIL :IN SB-IMPL::TOPLEVEL-REPL) {100311D46B}>)
 38: (SB-IMPL::TOPLEVEL-REPL NIL)
 39: (SB-IMPL::TOPLEVEL-INIT)
 40: ((FLET SB-UNIX::BODY :IN SAVE-LISP-AND-DIE))
 41: ((FLET "WITHOUT-INTERRUPTS-BODY-27" :IN SAVE-LISP-AND-DIE))
 42: ((LABELS SB-IMPL::RESTART-LISP :IN SAVE-LISP-AND-DIE))