Lisp Error

WEB> last-request
#S(LACK.REQUEST:REQUEST
   :ENV (:LACK.SESSION.OPTIONS
         (:ID "c63c88cc4ceaefcf2891e6a5da195b6e59500e2a" :NEW-SESSION NIL
          :CHANGE-ID NIL :EXPIRE NIL)
         :LACK.SESSION #<HASH-TABLE :TEST EQUAL :COUNT 2 {1009835303}>
         :REQUEST-METHOD :POST :SCRIPT-NAME "" :PATH-INFO "/create/component"
         :SERVER-NAME "localhost" :SERVER-PORT 5000 :SERVER-PROTOCOL :HTTP/1.1
         :REQUEST-URI "/create/component" :URL-SCHEME "http" ...)
   :METHOD :POST
   :SCRIPT-NAME ""
   :PATH-INFO "/create/component"
   :SERVER-NAME "localhost"
   :SERVER-PORT 5000
   :SERVER-PROTOCOL :HTTP/1.1
   :URI "/create/component"
   :URI-SCHEME "http"
   :REMOTE-ADDR "127.0.0.1"
   :REMOTE-PORT 58467
   :QUERY-STRING NIL
   :RAW-BODY #<CIRCULAR-STREAMS:CIRCULAR-INPUT-STREAM {10020B2E73}>
   :CONTENT-LENGTH 71
   :CONTENT-TYPE "application/x-www-form-urlencoded"
   :HEADERS #<HASH-TABLE :TEST EQUAL :COUNT 11 {10020B1A23}>
   :COOKIES (("lack.session" . "c63c88cc4ceaefcf2891e6a5da195b6e59500e2a"))
   :BODY-PARAMETERS (("contact[name]" . "a") ("contact[material]" . "a")
                     ("contact[file]" . "file.html"))
   :QUERY-PARAMETERS NIL)
WEB> (LACK.REQUEST:REQUEST-RAW-BODY last-request)
#<CIRCULAR-STREAMS:CIRCULAR-INPUT-STREAM {10020B2E73}>
WEB> (read-char (LACK.REQUEST:REQUEST-RAW-BODY last-request))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ERROR
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

#<SB-SYS:FD-STREAM for "socket 127.0.0.1:5000, peer: 127.0.0.1:58467" {1001B74CD3}> is closed
   [Condition of type SB-INT:CLOSED-STREAM-ERROR]

Restarts:
 0: [RETRY] Retry SLIME REPL evaluation request.
 1: [ABORT] Return to sldb level 3.
 2: [RETRY] Retry SLIME REPL evaluation request.
 3: [ABORT] Return to sldb level 2.
 4: [RETRY] Retry calling the generic function.
 5: [RETRY] Retry SLIME REPL evaluation request.
 --more--

Backtrace:
  0: (SB-KERNEL:CLOSED-FLAME #<SB-SYS:FD-STREAM for "socket 127.0.0.1:5000, peer: 127.0.0.1:58467" {1001B74CD3}>)
  1: (READ-BYTE #<SB-SYS:FD-STREAM for "socket 127.0.0.1:5000, peer: 127.0.0.1:58467" {1001B74CD3}> NIL NIL)
  2: ((:METHOD FLEXI-STREAMS::READ-BYTE* (FLEXI-STREAMS:FLEXI-INPUT-STREAM)) #<FLEXI-STREAMS:FLEXI-IO-STREAM {10020B15E3}>) [fast-method]
  3: ((:METHOD SB-GRAY:STREAM-READ-BYTE (FLEXI-STREAMS:FLEXI-INPUT-STREAM)) #<FLEXI-STREAMS:FLEXI-IO-STREAM {10020B15E3}>) [fast-method]
  4: ((SB-PCL::EMF SB-GRAY:STREAM-READ-BYTE) #<unused argument> #<unused argument> #<FLEXI-STREAMS:FLEXI-IO-STREAM {10020B15E3}>)
  5: (READ-BYTE #<FLEXI-STREAMS:FLEXI-IO-STREAM {10020B15E3}> NIL :EOF)
  6: (CIRCULAR-STREAMS::EXTEND-BUFFER-ONE #<CIRCULAR-STREAMS:CIRCULAR-INPUT-STREAM {10020B2E73}>)
  7: ((:METHOD SB-GRAY:STREAM-READ-BYTE (CIRCULAR-STREAMS:CIRCULAR-INPUT-STREAM)) #<CIRCULAR-STREAMS:CIRCULAR-INPUT-STREAM {10020B2E73}>) [fast-method]
  8: ((:METHOD SB-GRAY:STREAM-READ-CHAR (CIRCULAR-STREAMS:CIRCULAR-INPUT-STREAM)) #<CIRCULAR-STREAMS:CIRCULAR-INPUT-STREAM {10020B2E73}>) [fast-method]
  9: (READ-CHAR #<CIRCULAR-STREAMS:CIRCULAR-INPUT-STREAM {10020B2E73}> T NIL #<unused argument>)
 10: (SB-INT:SIMPLE-EVAL-IN-LEXENV (READ-CHAR (REQUEST-RAW-BODY LAST-REQUEST)) #<NULL-LEXENV>)
 11: (EVAL (READ-CHAR (REQUEST-RAW-BODY LAST-REQUEST)))
 --more--