OpenGL signalled (1280 . INVALID-ENUM) from GET-STRING.
   [Condition of type CL-OPENGL-BINDINGS:OPENGL-ERROR]

Restarts:
 0: [CONTINUE] Continue
 1: [RETRY] Retry SLIME REPL evaluation request.
 2: [*ABORT] Return to SLIME's top level.
 3: [ABORT] abort thread (#<THREAD "repl-thread" RUNNING {1004388033}>)

Backtrace:
  0: (CL-OPENGL-BINDINGS:CHECK-ERROR #<unavailable argument>)
      [No Locals]
  1: (CEPL-GL:HAS-FEATURE "GL_ARB_texture_storage")
      Locals:
        SB-DEBUG::ARG-0 = "GL_ARB_texture_storage"
  2: (CEPL-GL::TEXTURE-FEATURE-CHECK #<unavailable argument>)
      [No Locals]
  3: (CEPL.EVENTS::|context| #<CEPL.EVENTS:CONTEXT-CREATED {1003C0DFD3}>)
      Locals:
        SB-DEBUG::ARG-0 = #<CEPL.EVENTS:CONTEXT-CREATED {1003C0DFD3}>
  4: (CEPL.EVENTS::|all-events| #<CEPL.EVENTS:CONTEXT-CREATED {1003C0DFD3}>)
      Locals:
        SB-DEBUG::ARG-0 = #<CEPL.EVENTS:CONTEXT-CREATED {1003C0DFD3}>
  5: (CEPL:REPL 320 240 :SDL)
      Locals:
        BACKEND = :SDL
        HEIGHT = 240
        WIDTH = 320
  6: (SB-INT:SIMPLE-EVAL-IN-LEXENV (CEPL:REPL) #<NULL-LEXENV>)
      Locals:
        SB-DEBUG::ARG-0 = (CEPL:REPL)
        SB-DEBUG::ARG-1 = #<NULL-LEXENV>
  7: (EVAL (CEPL:REPL))
      Locals:
        SB-DEBUG::ARG-0 = (CEPL:REPL)
  8: (SWANK::EVAL-REGION "(cepl:repl) ..)
  9: ((LAMBDA NIL :IN SWANK-REPL::REPL-EVAL))
 10: (SWANK-REPL::TRACK-PACKAGE #<CLOSURE (LAMBDA NIL :IN SWANK-REPL::REPL-EVAL) {1002CBEAEB}>)
 11: (SWANK::CALL-WITH-RETRY-RESTART "Retry SLIME REPL evaluation request." #<CLOSURE (LAMBDA NIL :IN SWANK-REPL::REPL-EVAL) {1002CBEA4B}>)
 12: (SWANK::CALL-WITH-BUFFER-SYNTAX NIL #<CLOSURE (LAMBDA NIL :IN SWANK-REPL::REPL-EVAL) {1002CBEA2B}>)
 13: (SWANK-REPL::REPL-EVAL "(cepl:repl) ..)
 14: (SB-INT:SIMPLE-EVAL-IN-LEXENV (SWANK-REPL:LISTENER-EVAL "(cepl:repl) ..)
 15: (EVAL (SWANK-REPL:LISTENER-EVAL "(cepl:repl) ..)
 16: (SWANK:EVAL-FOR-EMACS (SWANK-REPL:LISTENER-EVAL "(cepl:repl) ..)
 17: (SWANK::PROCESS-REQUESTS NIL)
 18: ((LAMBDA NIL :IN SWANK::HANDLE-REQUESTS))
 19: ((LAMBDA NIL :IN SWANK::HANDLE-REQUESTS))
 20: (SWANK/SBCL::CALL-WITH-BREAK-HOOK #<FUNCTION SWANK:SWANK-DEBUGGER-HOOK> #<CLOSURE (LAMBDA NIL :IN SWANK::HANDLE-REQUESTS) {100439000B}>)
 21: ((FLET SWANK/BACKEND:CALL-WITH-DEBUGGER-HOOK :IN "/home/brian/.emacs.d/elpa/slime-20151011.2358/swank/sbcl.lisp") #<FUNCTION SWANK:SWANK-DEBUGGER-HOOK> #<CLOSURE (LAMBDA NIL :IN SWANK::HANDLE-REQUESTS..
 22: (SWANK::CALL-WITH-BINDINGS ((*STANDARD-OUTPUT* . #1=#<SWANK/GRAY::SLIME-OUTPUT-STREAM {100436DE83}>) (*STANDARD-INPUT* . #2=#<SWANK/GRAY::SLIME-INPUT-STREAM {1002C80193}>) (*TRACE-OUTPUT* . #1#) (*ERR..
 23: (SWANK::HANDLE-REQUESTS #<SWANK::MULTITHREADED-CONNECTION {10032B4893}> NIL)
 24: ((FLET #:WITHOUT-INTERRUPTS-BODY-1078 :IN SB-THREAD::INITIAL-THREAD-FUNCTION-TRAMPOLINE))
 25: ((FLET SB-THREAD::WITH-MUTEX-THUNK :IN SB-THREAD::INITIAL-THREAD-FUNCTION-TRAMPOLINE))
 26: ((FLET #:WITHOUT-INTERRUPTS-BODY-338 :IN SB-THREAD::CALL-WITH-MUTEX))
 27: (SB-THREAD::CALL-WITH-MUTEX #<CLOSURE (FLET SB-THREAD::WITH-MUTEX-THUNK :IN SB-THREAD::INITIAL-THREAD-FUNCTION-TRAMPOLINE) {7FFFF0A9ED5B}> #<SB-THREAD:MUTEX "thread result lock" owner: #<SB-THREAD:THR..
 28: (SB-THREAD::INITIAL-THREAD-FUNCTION-TRAMPOLINE #<SB-THREAD:THREAD "repl-thread" RUNNING {1004388033}> NIL #<CLOSURE (LAMBDA NIL :IN SWANK-REPL::SPAWN-REPL-THREAD) {1004387F9B}> (#<SB-THREAD:THREAD "re..
 29: ("foreign function: call_into_lisp")
 30: ("foreign function: new_thread_trampoline")