case bug

gistfile1.clj

(defn problematic-case-fn [x]
  (case x
    :xnw "xnw" :ltg "ltg" :qmu "qmu" :tff "tff" :btw "btw" :zpo "zpo" :dsq "dsq" :tvk "tvk" :iey "iey" :vut "vut" :qyg "qyg" :xgj "xgj" :bpa "bpa" :pgk "pgk" :ovf "ovf" :wqi "wqi" :vwd "vwd" :nfn "nfn" :une "une" :iru "iru" :eyu "eyu" :lfa "lfa" :mmh "mmh" :fze "fze" :siv "siv" :ggq "ggq" :yrf "yrf" :zcz "zcz" :uhl "uhl" :xiu "xiu" :mpi "mpi" :rxa "rxa" :wlg "wlg" :jgi "jgi" :cur "cur" :gbv "gbv" :ddm "ddm" :dki "dki" :lai "lai" :kek "kek" :gia "gia" :dxz "dxz" :tlg "tlg" :odc "odc" :xvx "xvx" :cdg "cdg" :zes "zes" :hci "hci" :voh "voh" :cmu "cmu" :ucc "ucc" :psw "psw" :eia "eia" :tao "tao" :elp "elp" :hzj "hzj" :mux "mux" :twh "twh" :uuy "uuy" :qkj "qkj" :tbu "tbu" :ply "ply" :xws "xws" :ztw "ztw" :gky "gky" :egz "egz" :cwu "cwu" :bby "bby" :usv "usv" :cun "cun" :nlo "nlo" :gvu "gvu" :rdk "rdk" :bla "bla" :ddu "ddu" :yrz "yrz" :xej "xej" :imk "imk" :kfm "kfm" :xvw "xvw" :cre "cre" :eqo "eqo" :rnd "rnd" :otf "otf" :ubf "ubf" :aqn "aqn" :xmx "xmx" :cxf "cxf" :dvx "dvx" :npq "npq" :yjs "yjs" :lbo "lbo" :gsl "gsl" :qzk "qzk" :xki "xki" :ynf "ynf" :yyt "yyt" :apm "apm" :qqo "qqo" :nwr "nwr" :opb "opb" :njv "njv" :jtd "jtd" :fln "fln" :ltn "ltn" :vnn "vnn" :xsw "xsw" :jkn "jkn" :tjn "tjn" :tve "tve" :yuz "yuz" :ktq "ktq" :cmv "cmv" :nwm "nwm" :rmy "rmy" :snp "snp" :opd "opd" :zwe "zwe" :ikj "ikj" :tsi "tsi" :lvk "lvk" :xtu "xtu" :rtx "rtx" :vyb "vyb" :eec "eec" :adl "adl" :vws "vws" :qqp "qqp" :hda "hda" :pvg "pvg" :zpu "zpu" :ivs "ivs" :xtw "xtw" :ajp "ajp" :owz "owz" :jtq "jtq" :dxj "dxj" :yib "yib" :qel "qel" :syr "syr" :jmn "jmn" :dbm "dbm" :jhs "jhs" :xht "xht" :glg "glg" :pvf "pvf" :gpg "gpg" :rdf "rdf" :gcf "gcf" :ode "ode"
    :fail))

(problematic-case-fn :xnw)
;;=> :fail